# UL Fire Alarm IoT Signaling Device ## Description UL-listed fire alarm signaling IoT device using STM32H757, dual Quectel EC21-AUV cellular modules, USB-C programming, LCD UI, dual SIM, dual antenna ports, 8 inputs, and isolated/dc-dc-coupled Quectel power/interface domains. ## Project Details - **Owner:** drewmoutney - **Created:** 7/5/2026 - **Last Updated:** 7/5/2026 - **Visibility:** Public - **Domain:** Fire Safety - **Human Interface:** LCD - **Compliance:** UL - **Connectivity:** Cellular - **Implementation Details:** STM32H757 dual Quectel EC21-AUV ## Key Components ### D1 — [SMBJ24A](https://www.flux.ai/cherepanyadima/smbj24a~2b.md) - Datasheet URL: https://services.taiwansemi.com/storage/resources/datasheet/SMBJ%20SERIES_R2104.pdf - Voltage Rating: 24V - Manufacturer Part Number: SMBJ24A-TR - Role: Input TVS surge suppressor - Manufacturer Name: Taiwan Semiconductor Corporation - Part Type: TVS **Pins:** - A [pin 2] - K [pin 1] ### D2 — [USBLC6-2SC6](https://www.flux.ai/lcsc/usblc6-2sc6~2e9x.md) - Package or Case Code: SOT-23-6_L2.9-W1.6-P0.95-LS2.8-BL - JLCPCB Part Class: Extended Part - Operating Temperature: -55°C ~ 125°C (TJ) - Manufacturer Name: UMW(友台半导体) - Maximum Clamping Voltage: 17V - Breakdown Voltage: 6V - Power: 150W - Peak Pulse Current: 5A - Datasheet URL: https://www.lcsc.com/datasheet/C2687116.pdf?spm=wm.sxq.inf.ggs&lcsc_vid=FlkNBAIDRQULVABfFAVZBgZVFVZYBgZSQ1NeBVIFQlExVlNRTlhdUVdURFlXXzsOAxUeFF5JWBYZEEoKFBINSQcJGk4dAgUUFAk%3D - Symbol Style: parametric-v1 - LCSC Part Number: C2687116 - Role Details: USB 2.0 D+/D- ESD protection - Part Type: ESD Protection Devices - Manufacturer Part Number: USBLC6-2SC6 - Role: Protection **Pins:** - GND [pin 2] - I/O1 [pin 1] - I/O1 [pin 6] - I/O2 [pin 3] - I/O2 [pin 4] - VBUS [pin 5] ### D3 — [ESD224DQA](https://www.flux.ai/kicad-part-library/esd224dqa~nw.md) - Manufacturer Name: Texas Instruments Inc. - Datasheet URL: https://www.ti.com/lit/ds/symlink/esd224.pdf - Role: Protection - Manufacturer Part Number: ESD224DQA - Package or Case Code: Diodes_UDFN-10_1.0x2.5mm_P0.5mm - Role Details: SIM interface ESD protection **Pins:** - ~ [pin 7] - ~ [pin 9] - ~ [pin 4] - ~ [pin 2] - ~ [pin 5] - ~ [pin 6] - ~ [pin 1] - ~ [pin 10] - VSS [pin 8] - VSS [pin 3] ### D4 — [ESD601DPYRQ1](https://www.flux.ai/adrian95/esd601dpyrq1~jxk.md) - Role Details: Cellular RF antenna ESD protection - Role: Protection - Datasheet URL: https://www.ti.com/lit/ds/symlink/esd601-q1.pdf?ts=1731602930370 - Part Type: Diode - Manufacturer Part Number: ESD601DPYRQ1 - Manufacturer Name: Texas Instruments - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - 1 [pin 1] - 2 [pin 2] ### D5 — [ESD601DPYRQ1](https://www.flux.ai/adrian95/esd601dpyrq1~jxk.md) - Role: Protection - Manufacturer Name: Texas Instruments - License: https://creativecommons.org/licenses/by/4.0/ - Role Details: Cellular RF antenna ESD protection - Datasheet URL: https://www.ti.com/lit/ds/symlink/esd601-q1.pdf?ts=1731602930370 - Part Type: Diode - Manufacturer Part Number: ESD601DPYRQ1 **Pins:** - 1 [pin 1] - 2 [pin 2] ### D6 — [1N4148SOD-123](https://www.flux.ai/lcsc/1n4148sod-123~ygrq.md) - Datasheet URL: https://www.lcsc.com/datasheet/C2972760.pdf?spm=wm.sxq.inf.ggs&lcsc_vid=FlkNBAIDRQULVABfFAVZBgZVFVZYBgZSQ1NeBVIFQlExVlNeR1JcUldURVBZUTsOAxUeFF5JWBYZEEoKFBINSQcJGk4dAgUUFAk%3D - Role: Flyback / Freewheeling - JLCPCB Part Class: Extended Part - Manufacturer Part Number: 1N4148SOD-123 - License: https://creativecommons.org/licenses/by/4.0/ - LCSC Part Number: C2972760 - Role Details: Relay coil flyback clamp - Package or Case Code: SOD-123_L2.6-W1.6-LS3.5-RD - Part Type: Switching Diode - Manufacturer Name: JKSEMI(金开盛) **Pins:** - A [pin 2] - K [pin 1] ### D7 — [1N4148SOD-123](https://www.flux.ai/lcsc/1n4148sod-123~ygrq.md) - Datasheet URL: https://www.lcsc.com/datasheet/C2972760.pdf?spm=wm.sxq.inf.ggs&lcsc_vid=FlkNBAIDRQULVABfFAVZBgZVFVZYBgZSQ1NeBVIFQlExVlNeR1JcUldURVBZUTsOAxUeFF5JWBYZEEoKFBINSQcJGk4dAgUUFAk%3D - Role: Flyback / Freewheeling - Manufacturer Part Number: 1N4148SOD-123 - JLCPCB Part Class: Extended Part - Role Details: Relay coil flyback clamp - LCSC Part Number: C2972760 - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Name: JKSEMI(金开盛) - Package or Case Code: SOD-123_L2.6-W1.6-LS3.5-RD - Part Type: Switching Diode **Pins:** - A [pin 2] - K [pin 1] ### D8 — [1N4148SOD-123](https://www.flux.ai/lcsc/1n4148sod-123~ygrq.md) - License: https://creativecommons.org/licenses/by/4.0/ - LCSC Part Number: C2972760 - Datasheet URL: https://www.lcsc.com/datasheet/C2972760.pdf?spm=wm.sxq.inf.ggs&lcsc_vid=FlkNBAIDRQULVABfFAVZBgZVFVZYBgZSQ1NeBVIFQlExVlNeR1JcUldURVBZUTsOAxUeFF5JWBYZEEoKFBINSQcJGk4dAgUUFAk%3D - JLCPCB Part Class: Extended Part - Manufacturer Part Number: 1N4148SOD-123 - Package or Case Code: SOD-123_L2.6-W1.6-LS3.5-RD - Part Type: Switching Diode - Role: Flyback / Freewheeling - Manufacturer Name: JKSEMI(金开盛) - Role Details: Relay coil flyback clamp **Pins:** - A [pin 2] - K [pin 1] ### J1 — [236-102](https://www.flux.ai/cherepanyadima/236-102~pe.md) - Connector Positions: 2 - Connector Pitch: 5.08mm - Manufacturer Name: https://wago.priintcloud.com/datasheets/236-102/en/ - Datasheet URL: https://wago.priintcloud.com/datasheets/236-102/en/ - Part Type: Connector - Manufacturer Part Number: 236-102 - Role: 12–24 VDC input terminal - Symbol Style: Parametric **Pins:** - ~ [pin L1] - ~ [pin L2] ### J10 — [DG301-5.0-2P12](https://www.flux.ai/cherepanyadima/dg301-5p0-2p12~2n.md) - Manufacturer Part Number: KF301-2P - Manufacturer Name: DEGSON ELECTRONICS - Role: Headers and Wire Housings - Connector Positions: 2 - Part Type: Connector - Connector Pitch: 5mm - Datasheet URL: https://www.tme.eu/Document/72ad9f371bb0c16572574ac47903b3 **Pins:** - 1 [pin 1] - 2 [pin 2] ### J11 — [DG301-5.0-2P12](https://www.flux.ai/cherepanyadima/dg301-5p0-2p12~2n.md) - Manufacturer Part Number: KF301-2P - Connector Positions: 2 - Manufacturer Name: DEGSON ELECTRONICS - Role: Headers and Wire Housings - Part Type: Connector - Datasheet URL: https://www.tme.eu/Document/72ad9f371bb0c16572574ac47903b3 - Connector Pitch: 5mm **Pins:** - 1 [pin 1] - 2 [pin 2] ### J12 — [DG301-5.0-2P12](https://www.flux.ai/cherepanyadima/dg301-5p0-2p12~2n.md) - Manufacturer Part Number: KF301-2P - Manufacturer Name: DEGSON ELECTRONICS - Role: Headers and Wire Housings - Part Type: Connector - Connector Pitch: 5mm - Connector Positions: 2 - Datasheet URL: https://www.tme.eu/Document/72ad9f371bb0c16572574ac47903b3 **Pins:** - 1 [pin 1] - 2 [pin 2] ### J13 — [DG301-5.0-2P12](https://www.flux.ai/cherepanyadima/dg301-5p0-2p12~2n.md) - Manufacturer Name: DEGSON ELECTRONICS - Manufacturer Part Number: KF301-2P - Datasheet URL: https://www.tme.eu/Document/72ad9f371bb0c16572574ac47903b3 - Part Type: Connector - Connector Positions: 2 - Role: Headers and Wire Housings - Connector Pitch: 5mm **Pins:** - 1 [pin 1] - 2 [pin 2] ### J14 — [DG301-5.0-2P12](https://www.flux.ai/cherepanyadima/dg301-5p0-2p12~2n.md) - Manufacturer Name: DEGSON ELECTRONICS - Manufacturer Part Number: KF301-2P - Connector Pitch: 5mm - Part Type: Connector - Role: Headers and Wire Housings - Datasheet URL: https://www.tme.eu/Document/72ad9f371bb0c16572574ac47903b3 - Connector Positions: 2 **Pins:** - 1 [pin 1] - 2 [pin 2] ### J15 — [DG301-5.0-2P12](https://www.flux.ai/cherepanyadima/dg301-5p0-2p12~2n.md) - Manufacturer Name: DEGSON ELECTRONICS - Role: Headers and Wire Housings - Manufacturer Part Number: KF301-2P - Connector Positions: 2 - Connector Pitch: 5mm - Part Type: Connector - Datasheet URL: https://www.tme.eu/Document/72ad9f371bb0c16572574ac47903b3 **Pins:** - 1 [pin 1] - 2 [pin 2] ### J16 — [DG301-5.0-2P12](https://www.flux.ai/cherepanyadima/dg301-5p0-2p12~2n.md) - Connector Pitch: 5mm - Manufacturer Name: DEGSON ELECTRONICS - Role: Headers and Wire Housings - Manufacturer Part Number: KF301-2P - Datasheet URL: https://www.tme.eu/Document/72ad9f371bb0c16572574ac47903b3 - Part Type: Connector - Connector Positions: 2 **Pins:** - 1 [pin 1] - 2 [pin 2] ### J17 — [5034801000](https://www.flux.ai/adrian95/5034801000~ef9.md) - Datasheet URL: https://tools.molex.com/pdm_docs/sd/5034801000_sd.pdf - Part Type: Connector - Role Details: SPI LCD FFC connector - Manufacturer Name: Molex - Role: Headers and Wire Housings - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Part Number: 5034801000 **Pins:** - 1 [pin 1] - 10 [pin 10] - 2 [pin 2] - 3 [pin 3] - 4 [pin 4] - 5 [pin 5] - 6 [pin 6] - 7 [pin 7] - 8 [pin 8] - 9 [pin 9] ### J18 — [DG301-5.0-2P12](https://www.flux.ai/cherepanyadima/dg301-5p0-2p12~2n.md) - Role Details: Dallas/iButton 1-Wire key reader connector placeholder - Role: Headers and Wire Housings - Manufacturer Name: DEGSON ELECTRONICS - Manufacturer Part Number: KF301-2P - Datasheet URL: https://www.tme.eu/Document/72ad9f371bb0c16572574ac47903b3 - Part Type: Connector **Pins:** - 1 [pin 1] - 2 [pin 2] ### J2 — [TYPE-C-2.0-16PIN-SMT-3-OR](https://www.flux.ai/lcsc/type-c-2p0-16pin-smt-3-or~957d.md) - Manufacturer Name: CIKI(皓富) - Role: Programming connector - LCSC Part Number: C2987387 - Part Type: USB Connectors - Manufacturer Part Number: TYPE-C-2.0-16PIN-SMT-3-OR - JLCPCB Part Class: Extended Part - Connector Type: USB-C - Package or Case Code: USB-SMD_TYPE-C16PIN-1 **Pins:** - 17 [pin 17] - 18 [pin 18] - 19 [pin 19] - 20 [pin 20] - CC1 [pin A5] - CC2 [pin B5] - DN1 [pin A7] - DN2 [pin B7] - DP1 [pin A6] - DP2 [pin B6] - GND [pin B1A12] - GND [pin A1B12] - SBU1 [pin A8] - SBU2 [pin B8] - VBUS [pin A4B9] - VBUS [pin B4A9] ### J3 — [ARM JTAG SWD 10Pin 0.05" Connector](https://www.flux.ai/vasy_skral/arm-jtag-swd-10pin-005-connector~y0b.md) - Role: Programming connector - Datasheet URL: https://suddendocs.samtec.com/catalog_english/ftsh_smt.pdf - Part Type: Connector - Connector Type: SWD - Symbol Style: parametric-v1 - Manufacturer Part Number: FTSH-105-01-L-DV-007-K - Manufacturer Name: Analog Devices **Pins:** - ~RESET~ [pin 10] - GND [pin 5] - GND [pin 3] - GNDDetect [pin 9] - NC/TDI [pin 8] - SWDCLK/TCK [pin 4] - SWDIO/TMS [pin 2] - SWO/TDO [pin 6] - VTref [pin 1] ### J4 — [78646-3001](https://www.flux.ai/adrian95/78646-3001~u5c.md) - Manufacturer Part Number: 78646-3001 - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Name: Molex - Datasheet URL: https://media.digikey.com/pdf/Data%20Sheets/Molex%20PDFs/micro-SIM_CardSockets(Hinged,PushPull).pdf - Role Details: SIM socket, one per modem - Part Type: Connector - Role: Memory Connectors **Pins:** - CLK [pin C3] - GND [pin G2] - GND [pin G6] - GND [pin C5] - GND [pin G4] - GND [pin G1] - GND [pin G3] - GND [pin G5] - I/O [pin C7] - RST [pin C2] - VCC [pin C1] - VPP [pin C6] ### J5 — [78646-3001](https://www.flux.ai/adrian95/78646-3001~u5c.md) - Part Type: Connector - Role: Memory Connectors - Manufacturer Part Number: 78646-3001 - License: https://creativecommons.org/licenses/by/4.0/ - Datasheet URL: https://media.digikey.com/pdf/Data%20Sheets/Molex%20PDFs/micro-SIM_CardSockets(Hinged,PushPull).pdf - Manufacturer Name: Molex - Role Details: SIM socket, one per modem **Pins:** - CLK [pin C3] - GND [pin G2] - GND [pin G6] - GND [pin C5] - GND [pin G4] - GND [pin G1] - GND [pin G3] - GND [pin G5] - I/O [pin C7] - RST [pin C2] - VCC [pin C1] - VPP [pin C6] ### J6 — [20449-001E-03](https://www.flux.ai/adrian95/20449-001e-03.md) - Connector Type: RF / Coaxial Connectors - Controlled Impedance: 50Ω - Role: RF Tuning / Matching - Part Type: Connectors - Datasheet URL: https://www.i-pex.com/sites/default/files/downloads/pdf/2D_MHF_4_RECEPTACLE_20449_1C22.pdf - Mount: Surface Mount - Package or Case Code: 4-SMD - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Part Number: 20449-001E-03 - Manufacturer Name: I-PEX **Pins:** - ~ [pin 2] - ~ [pin 4] - ~ [pin 1] - ~ [pin 3] ### J7 — [20449-001E-03](https://www.flux.ai/adrian95/20449-001e-03.md) - Connector Type: RF / Coaxial Connectors - Role: RF Tuning / Matching - Part Type: Connectors - Datasheet URL: https://www.i-pex.com/sites/default/files/downloads/pdf/2D_MHF_4_RECEPTACLE_20449_1C22.pdf - Package or Case Code: 4-SMD - Mount: Surface Mount - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Name: I-PEX - Manufacturer Part Number: 20449-001E-03 - Controlled Impedance: 50Ω **Pins:** - ~ [pin 2] - ~ [pin 4] - ~ [pin 1] - ~ [pin 3] ### J8 — [DG301-5.0-2P12](https://www.flux.ai/cherepanyadima/dg301-5p0-2p12~2n.md) - Connector Pitch: 5mm - Manufacturer Name: DEGSON ELECTRONICS - Manufacturer Part Number: KF301-2P - Datasheet URL: https://www.tme.eu/Document/72ad9f371bb0c16572574ac47903b3 - Role: Headers and Wire Housings - Connector Positions: 2 - Part Type: Connector **Pins:** - 1 [pin 1] - 2 [pin 2] ### J9 — [DG301-5.0-2P12](https://www.flux.ai/cherepanyadima/dg301-5p0-2p12~2n.md) - Manufacturer Name: DEGSON ELECTRONICS - Manufacturer Part Number: KF301-2P - Connector Positions: 2 - Part Type: Connector - Role: Headers and Wire Housings - Connector Pitch: 5mm - Datasheet URL: https://www.tme.eu/Document/72ad9f371bb0c16572574ac47903b3 **Pins:** - 1 [pin 1] - 2 [pin 2] ### K1 — [SRD-03VDC-SL-C](https://www.flux.ai/thornyspore/srd-03vdc-sl-c~db.md) - Manufacturer Part Number: SRD-03VDC-SL-C - Manufacturer Name: Ningbo Songle Relay - Role: Switching - Role Details: Firmware-programmable relay output - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Relay - Datasheet URL: https://www.circuitbasics.com/wp-content/uploads/2015/11/SRD-05VDC-SL-C-Datasheet.pdf **Pins:** - 3VDC [pin COIL2] - COM [pin COM] - GND [pin COIL1] - NC [pin NC] - NO [pin NO] ### K2 — [SRD-03VDC-SL-C](https://www.flux.ai/thornyspore/srd-03vdc-sl-c~db.md) - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Relay - Datasheet URL: https://www.circuitbasics.com/wp-content/uploads/2015/11/SRD-05VDC-SL-C-Datasheet.pdf - Role: Switching - Manufacturer Part Number: SRD-03VDC-SL-C - Manufacturer Name: Ningbo Songle Relay - Role Details: Firmware-programmable relay output **Pins:** - 3VDC [pin COIL2] - COM [pin COM] - GND [pin COIL1] - NC [pin NC] - NO [pin NO] ### K3 — [SRD-03VDC-SL-C](https://www.flux.ai/thornyspore/srd-03vdc-sl-c~db.md) - License: https://creativecommons.org/licenses/by/4.0/ - Role Details: Firmware-programmable relay output - Datasheet URL: https://www.circuitbasics.com/wp-content/uploads/2015/11/SRD-05VDC-SL-C-Datasheet.pdf - Part Type: Relay - Manufacturer Name: Ningbo Songle Relay - Manufacturer Part Number: SRD-03VDC-SL-C - Role: Switching **Pins:** - 3VDC [pin COIL2] - COM [pin COM] - GND [pin COIL1] - NC [pin NC] - NO [pin NO] ### Q1 — [PSMN5R2-60YLX](https://www.flux.ai/jecstronic/psmn5r2-60ylx~hnw.md) - Manufacturer Part Number: PSMN5R2-60YLX - Manufacturer Name: Nexperia USA Inc. - Datasheet URL: https://assets.nexperia.com/documents/data-sheet/PSMN5R2-60YL.pdf - License: https://creativecommons.org/licenses/by/4.0/ - Role Details: LTC4368 controlled back-to-back input protection MOSFETs - Role: Reverse Polarity Protection - Part Type: Transistor - Drain to Source Voltage: 60V **Pins:** - D [pin 5] - G [pin 4] - S [pin 3] - S [pin 2] - S [pin 1] ### Q2 — [PSMN5R2-60YLX](https://www.flux.ai/jecstronic/psmn5r2-60ylx~hnw.md) - Manufacturer Part Number: PSMN5R2-60YLX - Part Type: Transistor - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Name: Nexperia USA Inc. - Datasheet URL: https://assets.nexperia.com/documents/data-sheet/PSMN5R2-60YL.pdf - Role: Reverse Polarity Protection - Drain to Source Voltage: 60V - Role Details: LTC4368 controlled back-to-back input protection MOSFETs **Pins:** - D [pin 5] - G [pin 4] - S [pin 3] - S [pin 2] - S [pin 1] ### Q3 — [DTD143TKT146](https://www.flux.ai/jecstronic/dtd143tkt146~zz5.md) - Manufacturer Name: Diodes Incorporated - Role: Switching - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Transistor - Datasheet URL: https://www.rohm.com/datasheet/DTD143TK - Manufacturer Part Number: DTD143TKT146 - Role Details: Low-side relay coil driver **Pins:** - B [pin 1] - C [pin 3] - E [pin 2] ### Q4 — [DTD143TKT146](https://www.flux.ai/jecstronic/dtd143tkt146~zz5.md) - Manufacturer Part Number: DTD143TKT146 - Datasheet URL: https://www.rohm.com/datasheet/DTD143TK - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Transistor - Manufacturer Name: Diodes Incorporated - Role Details: Low-side relay coil driver - Role: Switching **Pins:** - B [pin 1] - C [pin 3] - E [pin 2] ### Q5 — [DTD143TKT146](https://www.flux.ai/jecstronic/dtd143tkt146~zz5.md) - Manufacturer Name: Diodes Incorporated - Datasheet URL: https://www.rohm.com/datasheet/DTD143TK - Manufacturer Part Number: DTD143TKT146 - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Transistor - Role Details: Low-side relay coil driver - Role: Switching **Pins:** - B [pin 1] - C [pin 3] - E [pin 2] ### SW1 — [TS-1088-AR02016](https://www.flux.ai/lcsc/ts-1088-ar02016~e3n1.md) - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2409302330_XUNPU-TS-1088-AR02016_C720477.pdf - Part Type: Tactile Switches - Package or Case Code: SW-SMD_L3.9-W3.0-P4.45 - JLCPCB Part Class: Extended Part - Manufacturer Name: XUNPU(讯普) - Role: Switching - Product Info Url: https://lcsc.com/product-detail/Tactile-Switches_XUNPU-TS-1088-AR02016_C720477.html - Role Details: Front panel navigation button - Manufacturer Part Number: TS-1088-AR02016 - LCSC Part Number: C720477 **Pins:** - 1 [pin 1] - 2 [pin 2] ### SW2 — [TS-1088-AR02016](https://www.flux.ai/lcsc/ts-1088-ar02016~e3n1.md) - Product Info Url: https://lcsc.com/product-detail/Tactile-Switches_XUNPU-TS-1088-AR02016_C720477.html - Manufacturer Part Number: TS-1088-AR02016 - LCSC Part Number: C720477 - Role: Switching - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2409302330_XUNPU-TS-1088-AR02016_C720477.pdf - Package or Case Code: SW-SMD_L3.9-W3.0-P4.45 - Role Details: Front panel navigation button - Part Type: Tactile Switches - JLCPCB Part Class: Extended Part - Manufacturer Name: XUNPU(讯普) **Pins:** - 1 [pin 1] - 2 [pin 2] ### SW3 — [TS-1088-AR02016](https://www.flux.ai/lcsc/ts-1088-ar02016~e3n1.md) - JLCPCB Part Class: Extended Part - Part Type: Tactile Switches - Package or Case Code: SW-SMD_L3.9-W3.0-P4.45 - Manufacturer Name: XUNPU(讯普) - Role: Switching - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2409302330_XUNPU-TS-1088-AR02016_C720477.pdf - LCSC Part Number: C720477 - Manufacturer Part Number: TS-1088-AR02016 - Role Details: Front panel navigation button - Product Info Url: https://lcsc.com/product-detail/Tactile-Switches_XUNPU-TS-1088-AR02016_C720477.html **Pins:** - 1 [pin 1] - 2 [pin 2] ### SW4 — [TS-1088-AR02016](https://www.flux.ai/lcsc/ts-1088-ar02016~e3n1.md) - Role: Switching - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2409302330_XUNPU-TS-1088-AR02016_C720477.pdf - Part Type: Tactile Switches - Package or Case Code: SW-SMD_L3.9-W3.0-P4.45 - JLCPCB Part Class: Extended Part - Manufacturer Name: XUNPU(讯普) - Product Info Url: https://lcsc.com/product-detail/Tactile-Switches_XUNPU-TS-1088-AR02016_C720477.html - Role Details: Front panel navigation button - Manufacturer Part Number: TS-1088-AR02016 - LCSC Part Number: C720477 **Pins:** - 1 [pin 1] - 2 [pin 2] ### U1 — [LTC4368HMS-1#PBF](https://www.flux.ai/lcsc/ltc4368hms-1pbf~u2c4.md) - Product Info Url: https://lcsc.com/product-detail/Pre-ordered-Products_Analog-Devices_LTC4368HMS-1-PBF_Analog-Devices-ADI-LINEAR-LTC4368HMS-1-PBF_C688391.html - LCSC Part Number: C688391 - JLCPCB Part Class: Extended Part - Operating Voltage: 2.5–60V - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2304140030_Analog-Devices-LTC4368HMS-1-PBF_C688391.pdf - Manufacturer Part Number: LTC4368HMS-1#PBF - Manufacturer Name: Analog Devices - Package or Case Code: MSOP-10_L3.0-W3.0-P0.50-LS5.0-BL - Role: Input surge/OV/UV/reverse protection controller **Pins:** - ~{FAULT} [pin 7] - ~{SHDN} [pin 6] - GATE [pin 10] - GND [pin 5] - OV [pin 3] - RETRY [pin 4] - SENSE [pin 9] - UV [pin 2] - VIN [pin 1] - VOUT [pin 8] ### U10 — [FM25V20A-DG](https://www.flux.ai/lcsc/fm25v20a-dg~8ddb.md) - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/1912131039_Infineon-Cypress-Semicon-FM25V20A-DG_C466868.pdf - Role Details: Nonvolatile event log/configuration memory; footprinted LCSC/JLCPCB-compatible FM25V20A-DG - LCSC Part Number: C466868 - JLCPCB Part Class: Extended Part - Package or Case Code: DFN-8_L6.0-W5.0-P1.27-BL-EP - Part Type: FRAM - Manufacturer Name: CYPRESS(赛普拉斯) - Manufacturer Part Number: FM25V20A-DG - Product Info Url: https://lcsc.com/product-detail/FRAM_Cypress-Semicon-FM25V20A-DG_C466868.html - Role: Memory **Pins:** - ~{CS} [pin 1] - ~{WP} [pin 3] - DNU [pin 7] - PAD [pin 9] - SCK [pin 6] - SI [pin 5] - SO [pin 2] - VDD [pin 8] - VSS [pin 4] ### U2 — [LM46002AQPWPRQ1](https://www.flux.ai/lcsc/lm46002aqpwprq1~1w7e.md) - Current Rating: 2A - LCSC Part Number: C2864368 - Package or Case Code: HTSSOP-16_L5.0-W4.4-P0.65-LS6.4-BL-EP-4 - JLCPCB Part Class: Extended Part - Manufacturer Name: TI(德州仪器) - Role: 3.3V system buck regulator - Max Output Voltage: 3.3V - Part Type: DC-DC Converters - Manufacturer Part Number: LM46002AQPWPRQ1 **Pins:** - AGND [pin 10] - BIAS [pin 5] - CBOOT [pin 3] - EN [pin 12] - EP [pin 17] - FB [pin 9] - PGND [pin 15] - PGND [pin 16] - PGOOD [pin 8] - RT [pin 7] - SS/TRK [pin 11] - SW [pin 1] - SW [pin 2] - SYNC [pin 6] - VCC [pin 4] - VIN [pin 14] - VIN [pin 13] ### U3 — [LM46002PWPT](https://www.flux.ai/lcsc/lm46002pwpt~m60r.md) - Part Type: DC-DC Converters - Role: MODEM_A 4.0V buck regulator placeholder - Current Rating: 3A - LCSC Part Number: C2070681 - Max Output Voltage: 4V - Package or Case Code: HTSSOP-16_L5.0-W4.4-P0.65-LS6.4-BL-EP - JLCPCB Part Class: Extended Part - Manufacturer Part Number: LM46002PWPT - Manufacturer Name: TI(德州仪器) **Pins:** - AGND [pin 10] - BIAS [pin 5] - CBOOT [pin 3] - EN [pin 12] - FB [pin 9] - PAD [pin 17] - PGND [pin 16] - PGND [pin 15] - PGOOD [pin 8] - RT [pin 7] - SS/TRK [pin 11] - SW [pin 2] - SW [pin 1] - SYNC [pin 6] - VCC [pin 4] - VIN [pin 13] - VIN [pin 14] ### U4 — [LM46002PWPT](https://www.flux.ai/lcsc/lm46002pwpt~m60r.md) - Manufacturer Name: TI(德州仪器) - Role: MODEM_B 4.0V buck regulator placeholder - JLCPCB Part Class: Extended Part - Manufacturer Part Number: LM46002PWPT - Package or Case Code: HTSSOP-16_L5.0-W4.4-P0.65-LS6.4-BL-EP - LCSC Part Number: C2070681 - Current Rating: 3A - Max Output Voltage: 4V - Part Type: DC-DC Converters **Pins:** - AGND [pin 10] - BIAS [pin 5] - CBOOT [pin 3] - EN [pin 12] - FB [pin 9] - PAD [pin 17] - PGND [pin 16] - PGND [pin 15] - PGOOD [pin 8] - RT [pin 7] - SS/TRK [pin 11] - SW [pin 2] - SW [pin 1] - SYNC [pin 6] - VCC [pin 4] - VIN [pin 13] - VIN [pin 14] ### U5 — [STM32H757IIT6](https://www.flux.ai/lcsc/stm32h757iit6~h8rz.md) - Role Details: Main dual-core STM32H757 system controller; LQFP-176 replacement for WLCSP U5 due to footprint/pad overlap issue. - JLCPCB Part Class: Extended Part - Manufacturer Name: ST(意法半导体) - Package or Case Code: LQFP-176_L24.0-W24.0-P0.50-LS26.0-BL - Manufacturer Part Number: STM32H757IIT6 - Role: Logic - Part Type: ST Microelectronics - LCSC Part Number: C730215 - Datasheet URL: https://assets.lcsc.com/datasheet/szlcsc/Download-ISO9001-Certification.pdf - Product Info Url: https://lcsc.com/product-detail/Pre-ordered-MCUs_STMicroelectronics-STM32H757IIT6_C730215.html **Pins:** - BOOT0 [pin 167] - DSI_CKN [pin 107] - DSI_CKP [pin 106] - DSI_D0N [pin 104] - DSI_D0P [pin 103] - NRST [pin 33] - PA0 [pin 41] - PA1 [pin 42] - PA10 [pin 129] - PA11 [pin 130] - PA12 [pin 131] - PA13 [pin 132] - PA14 [pin 138] - PA15 [pin 139] - PA2 [pin 43] - PA3 [pin 46] - PA4 [pin 49] - PA5 [pin 50] - PA6 [pin 51] - PA7 [pin 52] - PA8 [pin 127] - PA9 [pin 128] - PB0 [pin 55] - PB1 [pin 56] - PB10 [pin 78] - PB11 [pin 79] - PB12 [pin 85] - PB13 [pin 86] - PB14 [pin 87] - PB15 [pin 88] - PB2 [pin 57] - PB3 [pin 162] - PB4 [pin 163] - PB5 [pin 164] - PB6 [pin 165] - PB7 [pin 166] - PB8 [pin 168] - PB9 [pin 169] - PC0 [pin 34] - PC1 [pin 35] - PC10 [pin 140] - PC11 [pin 141] - PC12 [pin 142] - PC13 [pin 9] - PC14-OSC32_IN [pin 10] - PC15-OSC32_OUT [pin 11] - PC2_C [pin 36] - PC3_C [pin 37] - PC4 [pin 53] - PC5 [pin 54] - PC6 [pin 122] - PC7 [pin 123] - PC8 [pin 124] - PC9 [pin 125] - PD0 [pin 143] - PD1 [pin 144] - PD10 [pin 91] - PD11 [pin 94] - PD12 [pin 95] - PD13 [pin 96] - PD14 [pin 97] - PD15 [pin 98] - PD2 [pin 145] - PD3 [pin 146] - PD4 [pin 147] - PD5 [pin 148] - PD6 [pin 149] - PD7 [pin 150] - PD8 [pin 89] - PD9 [pin 90] - PDR_ON [pin 174] - PE0 [pin 170] - PE1 [pin 171] - PE10 [pin 72] - PE11 [pin 73] - PE12 [pin 74] - PE13 [pin 75] - PE14 [pin 76] - PE15 [pin 77] - PE2 [pin 1] - PE3 [pin 2] - PE4 [pin 3] - PE5 [pin 4] - PE6 [pin 5] - PE7 [pin 67] - PE8 [pin 68] - PE9 [pin 69] - PF0 [pin 18] - PF1 [pin 19] - PF10 [pin 30] - PF11 [pin 58] - PF12 [pin 59] - PF13 [pin 60] - PF14 [pin 61] - PF15 [pin 62] - PF2 [pin 20] - PF3 [pin 21] - PF4 [pin 22] - PF5 [pin 23] - PF6 [pin 26] - PF7 [pin 27] - PF8 [pin 28] - PF9 [pin 29] - PG0 [pin 63] - PG1 [pin 66] - PG10 [pin 154] - PG11 [pin 155] - PG12 [pin 156] - PG13 [pin 157] - PG14 [pin 158] - PG15 [pin 161] - PG2 [pin 110] - PG3 [pin 111] - PG4 [pin 114] - PG5 [pin 115] - PG6 [pin 116] - PG7 [pin 117] - PG8 [pin 118] - PG9 [pin 153] - PH0-OSC_IN [pin 31] - PH1-OSC_OUT [pin 32] - VBAT [pin 8] - VCAP [pin 133] - VCAP [pin 172] - VCAP [pin 80] - VCAPDSI [pin 101] - VDD [pin 13] - VDD [pin 44] - VDD [pin 113] - VDD [pin 71] - VDD [pin 25] - VDD [pin 65] - VDD [pin 176] - VDD [pin 160] - VDD [pin 48] - VDD [pin 99] - VDD [pin 84] - VDD [pin 92] - VDD [pin 136] - VDD [pin 152] - VDD [pin 7] - VDD [pin 126] - VDD12DSI [pin 108] - VDD12DSI [pin 102] - VDD33USB [pin 121] - VDD50USB [pin 120] - VDDA [pin 40] - VDDLDO [pin 175] - VDDLDO [pin 82] - VDDLDO [pin 135] - VDDSMPS [pin 16] - VFBSMPs [pin 17] - VLXSMPS [pin 15] - VREF+ [pin 39] - VSS [pin 64] - VSS [pin 137] - VSS [pin 70] - VSS [pin 173] - VSS [pin 12] - VSS [pin 134] - VSS [pin 47] - VSS [pin 45] - VSS [pin 100] - VSS [pin 93] - VSS [pin 112] - VSS [pin 24] - VSS [pin 6] - VSS [pin 83] - VSS [pin 151] - VSS [pin 81] - VSS [pin 119] - VSS [pin 159] - VSSA [pin 38] - VSSDSI [pin 109] - VSSDSI [pin 105] - VSSSMPS [pin 14] ### U6 — [EC25MXGA-128-SNNS](https://www.flux.ai/cherepanyadima/ec25mxga-128-snns.md) - Part Type: RF and Wireless - Datasheet URL: https://mm.digikey.com/Volume0/opasdata/d220001/medias/docus/7133/Quectel_EC25_Series_LTE_Standard_Specification_V2.8.pdf - Symbol Style: parametric-v1 - Manufacturer Name: Quectel - Role Details: Working selected module for modem A. EC25MXGA/EC25 footprint is EC21-family compatible and will be used instead of seeking exact EC21-AUV. - Role: Final selected cellular modem A module - Manufacturer Part Number: EC25MXGA-128-SNNS **Pins:** - ADC0 [pin 45] - ADC1 [pin 44] - ANT_DIV [pin 35] - ANT_GNSS [pin 47] - ANT_MAIN [pin 49] - AP_READY [pin 2] - BT_CTS [pin 40] - BT_EN [pin 139] - BT_RTS [pin 37] - BT_RXD [pin 39] - BT_TXD [pin 38] - COEX_UART_RX [pin 137] - COEX_UART_TX [pin 138] - CTS [pin 64] - DBG_RXD [pin 11] - DBG_TXD [pin 12] - DCD [pin 63] - DTR [pin 66] - EPHY_INT_N [pin 120] - EPHY_RST_N [pin 119] - GND [pin 100] - GND [pin 90] - GND [pin 91] - GND [pin 56] - GND [pin 46] - GND [pin 103] - GND [pin 109] - GND [pin 53] - GND [pin 99] - GND [pin 52] - GND [pin 8] - GND [pin 94] - GND [pin 50] - GND [pin 101] - GND [pin 19] - GND [pin 86] - GND [pin 107] - GND [pin 108] - GND [pin 92] - GND [pin 54] - GND [pin 104] - GND [pin 22] - GND [pin 102] - GND [pin 98] - GND [pin 110] - GND [pin 72] - GND [pin 36] - GND [pin 95] - GND [pin 89] - GND [pin 105] - GND [pin 93] - GND [pin 51] - GND [pin 111] - GND [pin 87] - GND [pin 9] - GND [pin 88] - GND [pin 85] - GND [pin 112] - GND [pin 48] - GND [pin 97] - GND [pin 96] - GND [pin 106] - I2C_SCL [pin 41] - I2C_SDA [pin 42] - NET_MODE [pin 5] - NET_STATUS [pin 6] - PCM_CLK [pin 27] - PCM_IN [pin 24] - PCM_OUT [pin 25] - PCM_SYNC [pin 26] - PM_ENABLE [pin 127] - PWRKEY [pin 21] - RESERVED [pin 74] - RESERVED [pin 3] - RESERVED [pin 55] - RESERVED [pin 116] - RESERVED [pin 114] - RESERVED [pin 75] - RESERVED [pin 77] - RESERVED [pin 144] - RESERVED [pin 83] - RESERVED [pin 80] - RESERVED [pin 18] - RESERVED [pin 117] - RESERVED [pin 78] - RESERVED [pin 81] - RESERVED [pin 43] - RESERVED [pin 84] - RESERVED [pin 141] - RESERVED [pin 79] - RESERVED [pin 82] - RESERVED [pin 113] - RESERVED [pin 143] - RESERVED [pin 76] - RESERVED [pin 140] - RESERVED [pin 73] - RESERVED [pin 142] - RESET_N [pin 20] - RI [pin 62] - RTS [pin 65] - RXD [pin 68] - SD_INS_DET [pin 23] - SDC1_CLK [pin 133] - SDC1_CMD [pin 134] - SDC1_DATA0 [pin 132] - SDC1_DATA1 [pin 131] - SDC1_DATA2 [pin 130] - SDC1_DATA3 [pin 129] - SDC2_CLK [pin 32] - SDC2_CMD [pin 33] - SDC2_DATA0 [pin 31] - SDC2_DATA1 [pin 30] - SDC2_DATA2 [pin 29] - SDC2_DATA3 [pin 28] - SGMII_MCLK [pin 122] - SGMII_MDATA [pin 121] - SGMII_RX_M [pin 126] - SGMII_RX_P [pin 125] - SGMII_TX_M [pin 123] - SGMII_TX_P [pin 124] - STATUS [pin 61] - TXD [pin 67] - USB_BOOT [pin 115] - USB_DM [pin 70] - USB_DP [pin 69] - USB_VBUS [pin 71] - USIM_CLK [pin 16] - USIM_DATA [pin 15] - USIM_GND [pin 10] - USIM_PRESENCE [pin 13] - USIM_RST [pin 17] - USIM_VDD [pin 14] - USIM2_VDD [pin 128] - VBAT_BB [pin 60] - VBAT_BB [pin 59] - VBAT_RF [pin 57] - VBAT_RF [pin 58] - VDD_EXT [pin 7] - VDD_SDIO [pin 34] - W_DISABLE# [pin 4] - WAKE_ON_WIRELESS [pin 135] - WAKEUP_IN [pin 1] - WLAN_EN [pin 136] - WLAN_SLP_CLK [pin 118] ### U7 — [EC25MXGA-128-SNNS](https://www.flux.ai/cherepanyadima/ec25mxga-128-snns.md) - Part Type: RF and Wireless - Manufacturer Name: Quectel - Datasheet URL: https://mm.digikey.com/Volume0/opasdata/d220001/medias/docus/7133/Quectel_EC25_Series_LTE_Standard_Specification_V2.8.pdf - Role Details: Working selected module for modem B. EC25MXGA/EC25 footprint is EC21-family compatible and will be used instead of seeking exact EC21-AUV. - Symbol Style: parametric-v1 - Role: Final selected cellular modem B module - Manufacturer Part Number: EC25MXGA-128-SNNS **Pins:** - ADC0 [pin 45] - ADC1 [pin 44] - ANT_DIV [pin 35] - ANT_GNSS [pin 47] - ANT_MAIN [pin 49] - AP_READY [pin 2] - BT_CTS [pin 40] - BT_EN [pin 139] - BT_RTS [pin 37] - BT_RXD [pin 39] - BT_TXD [pin 38] - COEX_UART_RX [pin 137] - COEX_UART_TX [pin 138] - CTS [pin 64] - DBG_RXD [pin 11] - DBG_TXD [pin 12] - DCD [pin 63] - DTR [pin 66] - EPHY_INT_N [pin 120] - EPHY_RST_N [pin 119] - GND [pin 100] - GND [pin 90] - GND [pin 91] - GND [pin 56] - GND [pin 46] - GND [pin 103] - GND [pin 109] - GND [pin 53] - GND [pin 99] - GND [pin 52] - GND [pin 8] - GND [pin 94] - GND [pin 50] - GND [pin 101] - GND [pin 19] - GND [pin 86] - GND [pin 107] - GND [pin 108] - GND [pin 92] - GND [pin 54] - GND [pin 104] - GND [pin 22] - GND [pin 102] - GND [pin 98] - GND [pin 110] - GND [pin 72] - GND [pin 36] - GND [pin 95] - GND [pin 89] - GND [pin 105] - GND [pin 93] - GND [pin 51] - GND [pin 111] - GND [pin 87] - GND [pin 9] - GND [pin 88] - GND [pin 85] - GND [pin 112] - GND [pin 48] - GND [pin 97] - GND [pin 96] - GND [pin 106] - I2C_SCL [pin 41] - I2C_SDA [pin 42] - NET_MODE [pin 5] - NET_STATUS [pin 6] - PCM_CLK [pin 27] - PCM_IN [pin 24] - PCM_OUT [pin 25] - PCM_SYNC [pin 26] - PM_ENABLE [pin 127] - PWRKEY [pin 21] - RESERVED [pin 74] - RESERVED [pin 3] - RESERVED [pin 55] - RESERVED [pin 116] - RESERVED [pin 114] - RESERVED [pin 75] - RESERVED [pin 77] - RESERVED [pin 144] - RESERVED [pin 83] - RESERVED [pin 80] - RESERVED [pin 18] - RESERVED [pin 117] - RESERVED [pin 78] - RESERVED [pin 81] - RESERVED [pin 43] - RESERVED [pin 84] - RESERVED [pin 141] - RESERVED [pin 79] - RESERVED [pin 82] - RESERVED [pin 113] - RESERVED [pin 143] - RESERVED [pin 76] - RESERVED [pin 140] - RESERVED [pin 73] - RESERVED [pin 142] - RESET_N [pin 20] - RI [pin 62] - RTS [pin 65] - RXD [pin 68] - SD_INS_DET [pin 23] - SDC1_CLK [pin 133] - SDC1_CMD [pin 134] - SDC1_DATA0 [pin 132] - SDC1_DATA1 [pin 131] - SDC1_DATA2 [pin 130] - SDC1_DATA3 [pin 129] - SDC2_CLK [pin 32] - SDC2_CMD [pin 33] - SDC2_DATA0 [pin 31] - SDC2_DATA1 [pin 30] - SDC2_DATA2 [pin 29] - SDC2_DATA3 [pin 28] - SGMII_MCLK [pin 122] - SGMII_MDATA [pin 121] - SGMII_RX_M [pin 126] - SGMII_RX_P [pin 125] - SGMII_TX_M [pin 123] - SGMII_TX_P [pin 124] - STATUS [pin 61] - TXD [pin 67] - USB_BOOT [pin 115] - USB_DM [pin 70] - USB_DP [pin 69] - USB_VBUS [pin 71] - USIM_CLK [pin 16] - USIM_DATA [pin 15] - USIM_GND [pin 10] - USIM_PRESENCE [pin 13] - USIM_RST [pin 17] - USIM_VDD [pin 14] - USIM2_VDD [pin 128] - VBAT_BB [pin 60] - VBAT_BB [pin 59] - VBAT_RF [pin 57] - VBAT_RF [pin 58] - VDD_EXT [pin 7] - VDD_SDIO [pin 34] - W_DISABLE# [pin 4] - WAKE_ON_WIRELESS [pin 135] - WAKEUP_IN [pin 1] - WLAN_EN [pin 136] - WLAN_SLP_CLK [pin 118] ### U8 — [ESD224DQA](https://www.flux.ai/kicad-part-library/esd224dqa~nw.md) - Package or Case Code: Diodes_UDFN-10_1.0x2.5mm_P0.5mm - Manufacturer Part Number: ESD224DQA - Role: Protection - Datasheet URL: https://www.ti.com/lit/ds/symlink/esd224.pdf - Manufacturer Name: Texas Instruments Inc. - Role Details: SIM interface ESD protection **Pins:** - ~ [pin 7] - ~ [pin 9] - ~ [pin 4] - ~ [pin 2] - ~ [pin 5] - ~ [pin 6] - ~ [pin 1] - ~ [pin 10] - VSS [pin 8] - VSS [pin 3] ### U9 — [DS3231MZ+TRL](https://www.flux.ai/lcsc/ds3231mzplustrl~w042.md) - Part Type: Real-time Clocks (RTC) - Manufacturer Part Number: DS3231MZ+TRL - Product Info Url: https://lcsc.com/product-detail/Real-time-Clocks_MAXIM_DS3231MZ_DS3231MZ_C107410.html - Role: Timing - Package or Case Code: SOIC-8_L4.9-W3.9-P1.27-LS6.0-BL - Logic Function: Clock - Operating Temperature: -40°C ~ 85°C - Role Details: RTC for timestamping and clock sync - LCSC Part Number: C107410 - JLCPCB Part Class: Extended Part - Manufacturer Name: ADI(亚德诺)/MAXIM(美信) - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2304140030_Analog-Devices-Inc--Maxim-Integrated-DS3231MZ-TRL_C107410.pdf - Voltage Supply: 2.3 ~ 5.5V **Pins:** - ~{INT}/SQW [pin 3] - ~{RST} [pin 4] - 32kHz [pin 1] - GND [pin 5] - SCL [pin 8] - SDA [pin 7] - VBAT [pin 6] - VCC [pin 2] *The full schematic, PCB layout, bill of materials, and interactive design are available at [https://www.flux.ai/drewmoutney/ul-fire-alarm-iot-signaling-device~ex](https://www.flux.ai/drewmoutney/ul-fire-alarm-iot-signaling-device~ex).* --- *Generated from [https://www.flux.ai/drewmoutney/ul-fire-alarm-iot-signaling-device~ex](https://www.flux.ai/drewmoutney/ul-fire-alarm-iot-signaling-device~ex)*