# TCS-SC-Core-Baseboard-v1 ## Description ESP32-S3 + C6 controller. 4× thermocouple, 2× SSR, CAN, ▎ 3.5" QSPI display (FRU mezzanine), tire SELV loop. ▎ 4-layer, 130×90mm. SmarTemp+ standard. ## Project Details - **Owner:** mikanik - **Created:** 5/29/2026 - **Last Updated:** 6/1/2026 - **Visibility:** Public - **Human Interface:** 3.5 inch 320x480 AXS15231 QSPI display FRU mezzanine; PWM piezo beeper - **Operating Voltage:** 12V input + USB-C 5V + LiPo backup via AXP2101 - **Implementation Details:** ESP32-S3-WROOM-1-N16R8 main MCU, ESP32-C6 radio co-processor, 4x MAX31856 thermocouple channels, 2x off-board SSR drives, 4-layer 130x90mm ENIG prototype - **Connectivity:** WiFi 2.4GHz, BLE, WiFi6/Thread/Matter co-processor over SPI, CAN - **Domain:** Industrial IoT temperature controller baseboard - **Reliability Target (MTBF):** 1-year warranty / 3-5 year product life ## Key Components ### D_CAN — [PESD1CANVL](https://www.flux.ai/lcsc/pesd1canvl~zvz7.md) - Role: CAN ESD Protection - Role Details: PESD1CAN TVS near CAN connector for paddock/vehicle transient immunity - Manufacturer Part Number: PESD1CANVL - Product Info Url: https://lcsc.com/product-detail/presales_Nexperia-PESD1CANVL_C552462.html - Part Type: ESD Protection Devices - LCSC Part Number: C552462 - Manufacturer Name: Nexperia(安世) - JLCPCB Part Class: Extended Part - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2006101537_Nexperia-PESD1CANVL_C552462.pdf - Package or Case Code: SOT-23-3_L2.9-W1.3-P1.90-LS2.4-BR **Pins:** - 1 [pin 1] - 2 [pin 2] - 3 [pin 3] ### D_TC — [CDSOT23-SM712](https://www.flux.ai/jecstronic/cdsot23-sm712~xbk.md) - Role Details: SM712 TVS for thermocouple input protection - Manufacturer Name: Bourns Inc. - Manufacturer Part Number: CDSOT23-SM712 - Datasheet URL: https://www.bourns.com/docs/Product-Datasheets/CDSOT23-SM712.pdf - Part Type: Diode - Role: Protection - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - GND [pin 3] - I/O_1 [pin 1] - I/O_2 [pin 2] ### D_TC1 — [CDSOT23-SM712](https://www.flux.ai/jecstronic/cdsot23-sm712~xbk.md) - Manufacturer Name: Bourns Inc. - Manufacturer Part Number: CDSOT23-SM712 - Datasheet URL: https://www.bourns.com/docs/Product-Datasheets/CDSOT23-SM712.pdf - Role: Protection - Part Type: Diode - License: https://creativecommons.org/licenses/by/4.0/ - Role Details: SM712 TVS for thermocouple input protection **Pins:** - GND [pin 3] - I/O_1 [pin 1] - I/O_2 [pin 2] ### D2 — [SMBJ24A-TR](https://www.flux.ai/lcsc/smbj24a-tr~hqz2.md) - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2304140030_STMicroelectronics-SMBJ24A-TR_C133668.pdf - Role: Surge Protection - Product Info Url: https://lcsc.com/product-detail/TVS_STMicroelectronics_SMBJ24A-TR_SMBJ24A-TR_C133668.html - Manufacturer Part Number: SMBJ24A-TR - Part Type: TVS - Manufacturer Name: ST(意法半导体) - LCSC Part Number: C133668 - JLCPCB Part Class: Extended Part - Role Details: SMBJ24A TVS on 12V input after reverse protection - Package or Case Code: SMB_L4.6-W3.6-LS5.3-RD **Pins:** - A [pin 2] - K [pin 1] ### F1 — [SMD2920-250-24](https://www.flux.ai/adrian95/smd2920-250-24~jof.md) - LCSC Part Number: C47753886 - Manufacturer Name: R+O - Role: Protection - Part Type: Fuse - License: https://creativecommons.org/licenses/by/4.0/ - Datasheet URL: https://www.lcsc.com/datasheet/C47753886.pdf - Role Details: 12V input polyfuse; provisional high-current library match, EE to verify hold current against final power budget - Manufacturer Part Number: SMD2920-250-24 **Pins:** - P1 [pin 1] - P2 [pin 2] ### J_FP — [SM10B-GHS-TB(LF)(SN)](https://www.flux.ai/adrian95/sm10b-ghs-tblfsn~y53.md) - Manufacturer Part Number: SM10B-GHS-TB(LF)(SN) - Role: Connector - Datasheet URL: https://www.mouser.tw/datasheet/3/1070/1/eGH.pdf - Part Type: Connectors - Mount: Surface Mount - Role Details: POPULATED front-panel/enclosure harness connector. Carries U30 TCA9554 P0-P7 slow I/O for buttons/LEDs/BL_EN plus +3V3/GND reference. Exact button/LED count and per-pin assignment OPEN enclosure/EE item. - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Name: JST **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] - MP_1 [pin 11] - MP_2 [pin 12] ### J_MEZZ — [DF40C-40DS-0.4V(51)](https://www.flux.ai/lcsc/df40c-40ds-0p4v51~bxjk.md) - JLCPCB Part Class: Extended Part - Manufacturer Part Number: DF40C-40DS-0.4V(51) - Part Type: Mezzanine Connectors (Board to Board) - Manufacturer Name: HRS(广濑) - Role Details: 40-pin Hirose DF40C display FRU boundary for QSPI display, I2C touch, power, and mezzanine ID - Role: Display Mezzanine Connector - LCSC Part Number: C424644 - Package or Case Code: CONN-SMD_DF40C-40DS-0.4V51 **Pins:** - 1 [pin 1] - 10 [pin 10] - 11 [pin 11] - 12 [pin 12] - 13 [pin 13] - 14 [pin 14] - 15 [pin 15] - 16 [pin 16] - 17 [pin 17] - 18 [pin 18] - 19 [pin 19] - 2 [pin 2] - 20 [pin 20] - 21 [pin 21] - 22 [pin 22] - 23 [pin 23] - 24 [pin 24] - 25 [pin 25] - 26 [pin 26] - 27 [pin 27] - 28 [pin 28] - 29 [pin 29] - 3 [pin 3] - 30 [pin 30] - 31 [pin 31] - 32 [pin 32] - 33 [pin 33] - 34 [pin 34] - 35 [pin 35] - 36 [pin 36] - 37 [pin 37] - 38 [pin 38] - 39 [pin 39] - 4 [pin 4] - 40 [pin 40] - 5 [pin 5] - 6 [pin 6] - 7 [pin 7] - 8 [pin 8] - 9 [pin 9] ### J1 — [USB4105-GF-A](https://www.flux.ai/adrian95/usb4105-gf-a~im9.md) - Datasheet URL: https://gct.co/files/specs/usb4105-spec.pdf - Part Type: USB C - Manufacturer Part Number: USB4105-GF-A - Role: USB-C Connector - Manufacturer Name: GCT - Manufacturer Name: GCT - Role Details: USB 2.0 D+/D-, VBUS, CC1/CC2 sink connection for ESP32-S3 programming and 5V input - License: https://creativecommons.org/licenses/by/4.0/ - Symbol Style: parametric-v1 **Pins:** - CC1 [pin A5] - CC2 [pin B5] - DN1 [pin A7] - DN2 [pin B7] - DP1 [pin A6] - DP2 [pin B6] - GND [pin A1_B12] - GND__1 [pin B1_A12] - SBU1 [pin A8] - SBU2 [pin B8] - SHELL_GND [pin SH1] - SHELL_GND__1 [pin SH2] - SHELL_GND__2 [pin SH3] - SHELL_GND__3 [pin SH4] - VBUS [pin A4_B9] - VBUS__1 [pin B4_A9] ### J10 — [691321300004](https://www.flux.ai/adrian95/691321300004~y3o.md) - Manufacturer Part Number: 691321300004 - Role: Protection - Manufacturer Name: Würth Elektronik - Datasheet URL: https://www.we-online.com/components/products/datasheet/6913213000xx.pdf - License: https://creativecommons.org/licenses/by/4.0/ - Role Details: 12V SELV power input connector; feeds 12V-to-5V buck preregulator - Part Type: Connector **Pins:** - Pin_1 [pin 1] - Pin_2 [pin 2] - Pin_3 [pin 3] - Pin_4 [pin 4] ### J2 — [B2B-PH-K-S](https://www.flux.ai/adrian95/b2b-ph-k-s~fx.md) - Manufacturer Name: JST - Role Details: 2-pin JST PH single-cell LiPo connector to AXP2101 BAT/GND - Package or Case Code: JST_B2B-PH-K-S - Datasheet URL: https://www.jst-mfg.com/product/pdf/eng/ePH.pdf - License: https://creativecommons.org/licenses/by/4.0/ - Role: Battery Connector - Part Type: Connector - Manufacturer Part Number: B2B-PH-K-S **Pins:** - 1 [pin 1] - 2 [pin 2] ### J4 — [1935776](https://www.flux.ai/adrian95/1935776~tcy.md) - License: https://creativecommons.org/licenses/by/4.0/ - Role: Sensing (Shunt) - Datasheet URL: https://datasheet.datasheetarchive.com/originals/distributors/SFDatasheet-2/sf-00057493.pdf - Connector Type: Terminal Blocks - Role Details: 2-position thermocouple input connector for one MAX31856 channel - Part Type: Connector - Connector Pitch: 5mm - Manufacturer Name: Phoenix Contact - Connector Positions: 2 - Connector Rows: 1 - Manufacturer Part Number: 1935776 **Pins:** - 1 [pin 1] - 2 [pin 2] ### J5 — [1935776](https://www.flux.ai/adrian95/1935776~tcy.md) - Datasheet URL: https://datasheet.datasheetarchive.com/originals/distributors/SFDatasheet-2/sf-00057493.pdf - Connector Type: Terminal Blocks - Role Details: 2-position thermocouple input connector for one MAX31856 channel - License: https://creativecommons.org/licenses/by/4.0/ - Connector Positions: 2 - Connector Pitch: 5mm - Manufacturer Name: Phoenix Contact - Connector Rows: 1 - Manufacturer Part Number: 1935776 - Role: Sensing (Shunt) - Part Type: Connector **Pins:** - 1 [pin 1] - 2 [pin 2] ### J6 — [1935776](https://www.flux.ai/adrian95/1935776~tcy.md) - License: https://creativecommons.org/licenses/by/4.0/ - Datasheet URL: https://datasheet.datasheetarchive.com/originals/distributors/SFDatasheet-2/sf-00057493.pdf - Connector Type: Terminal Blocks - Part Type: Connector - Connector Pitch: 5mm - Manufacturer Name: Phoenix Contact - Role: Sensing (Shunt) - Connector Positions: 2 - Role Details: 2-position thermocouple input connector for one MAX31856 channel - Connector Rows: 1 - Manufacturer Part Number: 1935776 **Pins:** - 1 [pin 1] - 2 [pin 2] ### J7 — [1935776](https://www.flux.ai/adrian95/1935776~tcy.md) - License: https://creativecommons.org/licenses/by/4.0/ - Role: Sensing (Shunt) - Connector Type: Terminal Blocks - Role Details: 2-position thermocouple input connector for one MAX31856 channel - Datasheet URL: https://datasheet.datasheetarchive.com/originals/distributors/SFDatasheet-2/sf-00057493.pdf - Part Type: Connector - Connector Rows: 1 - Manufacturer Part Number: 1935776 - Connector Pitch: 5mm - Manufacturer Name: Phoenix Contact - Connector Positions: 2 **Pins:** - 1 [pin 1] - 2 [pin 2] ### J8 — [691321300004](https://www.flux.ai/adrian95/691321300004~y3o.md) - Manufacturer Name: Würth Elektronik - Manufacturer Part Number: 691321300004 - Datasheet URL: https://www.we-online.com/components/products/datasheet/6913213000xx.pdf - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Connector - Role: Switching - Role Details: 4-position connector for two off-board SSR control loops; mains remains off-board **Pins:** - Pin_1 [pin 1] - Pin_2 [pin 2] - Pin_3 [pin 3] - Pin_4 [pin 4] ### J9 — [691321300004](https://www.flux.ai/adrian95/691321300004~y3o.md) - Role: SSR Output Connector - Manufacturer Part Number: 691321300004 - Role Details: Only two SmarTemp+ populated SSR control terminals are active; other positions are DNP/no-connect. - Manufacturer Name: Würth Elektronik - Datasheet URL: https://www.we-online.com/components/products/datasheet/6913213000xx.pdf - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Connector **Pins:** - Pin_1 [pin 1] - Pin_2 [pin 2] - Pin_3 [pin 3] - Pin_4 [pin 4] ### LS1 — [CPT-1625-80-SMT-TR](https://www.flux.ai/adrian95/cpt-1625-80-smt-tr~sgo.md) - Datasheet URL: https://www.cuidevices.com/product/resource/cpt-1625-80-smt-tr.pdf - Part Type: Buzzer - Package or Case Code: XDCR_CPT-1625-80-SMT-TR - Manufacturer Part Number: CPT-1625-80-SMT-TR - License: https://creativecommons.org/licenses/by/4.0/ - Role Details: Externally driven piezo transducer LS1; positive terminal to +3V3, negative terminal switched by Q_BEEP from ESP32-S3 GPIO16 PWM. - Role: Audio Indicator - Manufacturer Name: Same Sky (Formerly CUI Devices) **Pins:** - ~ [pin N] - ~ [pin P] ### Q_BEEP — [BSS138LT3G](https://www.flux.ai/openpartlist/bss138lt3g~d7.md) - Datasheet URL: https://www.onsemi.com/pdf/datasheet/bss138lt1-d.pdf - Role: Beeper Driver - Manufacturer Name: onsemi - License: https://creativecommons.org/licenses/by/4.0/ - Role Details: POPULATED beeper drive transistor: ESP32-S3 GPIO16 PWM -> R_BEEP -> Q_BEEP gate; Q_BEEP low-side switches LS1 piezo. Separate from all SSR FETs; do not DNP. - Part Type: Transistor - Manufacturer Part Number: BSS138LT3G **Pins:** - D [pin 3] - G [pin 1] - S [pin 2] ### Q_REV — [DMP3017SFG-7](https://www.flux.ai/lcsc/dmp3017sfg-7~dzba.md) - Manufacturer Part Number: DMP3017SFG-7 - Package or Case Code: POWERDI3333-8_L3.3-W3.3-P0.65-BL - Manufacturer Name: DIODES(美台) - Part Type: MOSFETs - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/1912111437_Diodes-Incorporated-DMP3017SFG-7_C461072.pdf - Role: Reverse Polarity Protection - JLCPCB Part Class: Extended Part - Role Details: DMP3017 P-channel MOSFET for 12V input reverse-polarity survival - LCSC Part Number: C461072 - Product Info Url: https://lcsc.com/product-detail/MOSFET_Diodes-Incorporated-DMP3017SFG-7_C461072.html **Pins:** - D [pin 5] - G [pin 4] - S [pin 1] - S [pin 2] - S [pin 3] ### Q1 — [2N7002,215](https://www.flux.ai/adrian95/2n7002215~nwc.md) - Role: SSR Driver - License: https://creativecommons.org/licenses/by/4.0/ - Datasheet URL: https://assets.nexperia.com/documents/data-sheet/2N7002.pdf - Manufacturer Part Number: 2N7002,215 - Role Details: Populated SmarTemp+ SSR channel 1 low-side FET driven by TCA9555; drain routes to J9 active SSR control terminal. - Part Type: Transistor - Manufacturer Name: Nexperia USA Inc. **Pins:** - D [pin 2] - G [pin 1] - S [pin 3] ### Q2 — [2N7002,215](https://www.flux.ai/adrian95/2n7002215~nwc.md) - Role Details: Populated SmarTemp+ SSR channel 2 low-side FET driven by TCA9555; drain routes to J9 active SSR control terminal. - License: https://creativecommons.org/licenses/by/4.0/ - Datasheet URL: https://assets.nexperia.com/documents/data-sheet/2N7002.pdf - Role: SSR Driver - Manufacturer Part Number: 2N7002,215 - Part Type: Transistor - Manufacturer Name: Nexperia USA Inc. **Pins:** - D [pin 2] - G [pin 1] - S [pin 3] ### SW1 — [B3U-1000P](https://www.flux.ai/adrian95/b3u-1000p~kb2.md) - Part Type: Switch - Manufacturer Part Number: B3U-1000P - License: https://creativecommons.org/licenses/by/4.0/ - Role: Boot Switch - Role Details: BOOT button pulls ESP32-S3 GPIO0 low - Manufacturer Name: Omron Electronics Inc-EMC Div - Datasheet URL: https://omronfs.omron.com/en_US/ecb/products/pdf/en-b3u.pdf **Pins:** - 1 [pin 1] - 2 [pin 2] ### SW2 — [B3U-1000P](https://www.flux.ai/adrian95/b3u-1000p~kb2.md) - Datasheet URL: https://omronfs.omron.com/en_US/ecb/products/pdf/en-b3u.pdf - Role: Reset Switch - Manufacturer Name: Omron Electronics Inc-EMC Div - License: https://creativecommons.org/licenses/by/4.0/ - Role Details: Reset button pulls ESP32-S3 EN low - Manufacturer Part Number: B3U-1000P - Part Type: Switch **Pins:** - 1 [pin 1] - 2 [pin 2] ### U_C6 — [ESP32-C6-MINI-1-N4](https://www.flux.ai/vasyl/esp32-c6-mini-1-n4~0jh.md) - Symbol Style: parametric-v1 - Manufacturer Part Number: ESP32-C6-MINI-1-N4 - Role Details: ESP32-C6-MINI-1 stock esp-hosted SPI slave for WiFi6/Thread/Zigbee/Matter; replaces stale WROOM part - Role: Radio Co-Processor - Manufacturer Name: Espressif Systems - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: RF module - Datasheet URL: https://www.espressif.com/sites/default/files/documentation/esp32-c6-mini-1_mini-1u_datasheet_en.pdf **Pins:** - 3V3 [pin 3] - EN [pin 8] - GND_1 [pin 1] - GND_1__1 [pin 2] - GND_1__10 [pin 42] - GND_1__11 [pin 43] - GND_1__12 [pin 44] - GND_1__13 [pin 45] - GND_1__14 [pin 46] - GND_1__2 [pin 11] - GND_1__3 [pin 14] - GND_1__4 [pin 36] - GND_1__5 [pin 37] - GND_1__6 [pin 38] - GND_1__7 [pin 39] - GND_1__8 [pin 40] - GND_1__9 [pin 41] - GND_2 [pin 47] - GND_2__1 [pin 48] - GND_2__10 [pin 49_9] - GND_2__11 [pin 50] - GND_2__12 [pin 51] - GND_2__13 [pin 52] - GND_2__14 [pin 53] - GND_2__2 [pin 49_1] - GND_2__3 [pin 49_2] - GND_2__4 [pin 49_3] - GND_2__5 [pin 49_4] - GND_2__6 [pin 49_5] - GND_2__7 [pin 49_6] - GND_2__8 [pin 49_7] - GND_2__9 [pin 49_8] - IO0 [pin 12] - IO1 [pin 13] - IO12 [pin 17] - IO13 [pin 18] - IO14 [pin 19] - IO15 [pin 20] - IO18 [pin 24] - IO19 [pin 25] - IO2 [pin 5] - IO20 [pin 26] - IO21 [pin 27] - IO22 [pin 28] - IO23 [pin 29] - IO3 [pin 6] - IO4 [pin 9] - IO5 [pin 10] - IO6 [pin 15] - IO7 [pin 16] - IO8 [pin 22] - IO9 [pin 23] - NC [pin 21] - NC [pin 4] - NC__1 [pin 7] - NC__5 [pin 32] - NC__6 [pin 33] - NC__7 [pin 34] - NC__8 [pin 35] - RXD0 [pin 30] - TXD0 [pin 31] ### U1 — [ESP32-S3-WROOM-1-N16R8](https://www.flux.ai/adrian95/esp32-s3-wroom-1-n16r8~fs1.md) - Part Type: Module - License: https://creativecommons.org/licenses/by/4.0/ - Role Details: ESP32-S3 primary controller for thermocouples, display, SSR, CAN, beeper, USB - Datasheet URL: https://www.mouser.com/datasheet/2/891/esp32_s3_wroom_1_wroom_1u_datasheet_en-2930317.pdf - Symbol Style: parametric-v1 - Role: Main MCU - Manufacturer Name: Espressif Systems - Manufacturer Part Number: ESP32-S3-WROOM-1-N16R8 **Pins:** - 3V3 [pin 2] - EN [pin 3] - GND_1 [pin 1] - GND_10 [pin 48] - GND_11 [pin 49] - GND_2 [pin 40] - GND_3 [pin 41] - GND_4 [pin 42] - GND_5 [pin 43] - GND_6 [pin 44] - GND_7 [pin 45] - GND_8 [pin 46] - GND_9 [pin 47] - IO0 [pin 27] - IO1 [pin 39] - IO10 [pin 18] - IO11 [pin 19] - IO12 [pin 20] - IO13 [pin 21] - IO14 [pin 22] - IO15 [pin 8] - IO16 [pin 9] - IO17 [pin 10] - IO18 [pin 11] - IO19 [pin 13] - IO2 [pin 38] - IO20 [pin 14] - IO21 [pin 23] - IO3 [pin 15] - IO35 [pin 28] - IO36 [pin 29] - IO37 [pin 30] - IO38 [pin 31] - IO39 [pin 32] - IO4 [pin 4] - IO40 [pin 33] - IO41 [pin 34] - IO42 [pin 35] - IO45 [pin 26] - IO46 [pin 16] - IO47 [pin 24] - IO48 [pin 25] - IO5 [pin 5] - IO6 [pin 6] - IO7 [pin 7] - IO8 [pin 12] - IO9 [pin 17] - RXD0 [pin 36] - TXD0 [pin 37] ### U10 — [MAX31856](https://www.flux.ai/vasy_skral/max31856~i3j.md) - Datasheet URL: https://datasheets.maximintegrated.com/en/ds/MAX31856.pdf - Manufacturer Name: Maxim Integrated - Part Type: Integrated - Role: Thermocouple ADC - Manufacturer Part Number: MAX31856MUD+ - Role Details: MAX31856 channel on shared SPI bus with individual chip select **Pins:** - ~CS [pin 9] - ~DRDY [pin 7] - ~FAULT [pin 13] - AGND [pin 1] - AVDD [pin 5] - BIAS [pin 2] - DGND [pin 14] - DNC [pin 6] - DVDD [pin 8] - SCK [pin 10] - SDI [pin 12] - SDO [pin 11] - T- [pin 3] - T+ [pin 4] ### U11 — [MAX31856](https://www.flux.ai/vasy_skral/max31856~i3j.md) - Role: Thermocouple ADC - Manufacturer Name: Maxim Integrated - Datasheet URL: https://datasheets.maximintegrated.com/en/ds/MAX31856.pdf - Part Type: Integrated - Manufacturer Part Number: MAX31856MUD+ - Role Details: MAX31856 channel on shared SPI bus with individual chip select **Pins:** - ~CS [pin 9] - ~DRDY [pin 7] - ~FAULT [pin 13] - AGND [pin 1] - AVDD [pin 5] - BIAS [pin 2] - DGND [pin 14] - DNC [pin 6] - DVDD [pin 8] - SCK [pin 10] - SDI [pin 12] - SDO [pin 11] - T- [pin 3] - T+ [pin 4] ### U12 — [MAX31856](https://www.flux.ai/vasy_skral/max31856~i3j.md) - Part Type: Integrated - Role Details: MAX31856 channel on shared SPI bus with individual chip select - Manufacturer Part Number: MAX31856MUD+ - Role: Thermocouple ADC - Manufacturer Name: Maxim Integrated - Datasheet URL: https://datasheets.maximintegrated.com/en/ds/MAX31856.pdf **Pins:** - ~CS [pin 9] - ~DRDY [pin 7] - ~FAULT [pin 13] - AGND [pin 1] - AVDD [pin 5] - BIAS [pin 2] - DGND [pin 14] - DNC [pin 6] - DVDD [pin 8] - SCK [pin 10] - SDI [pin 12] - SDO [pin 11] - T- [pin 3] - T+ [pin 4] ### U13 — [MAX31856](https://www.flux.ai/vasy_skral/max31856~i3j.md) - Datasheet URL: https://datasheets.maximintegrated.com/en/ds/MAX31856.pdf - Manufacturer Name: Maxim Integrated - Role: Thermocouple ADC - Part Type: Integrated - Role Details: MAX31856 channel on shared SPI bus with individual chip select - Manufacturer Part Number: MAX31856MUD+ **Pins:** - ~CS [pin 9] - ~DRDY [pin 7] - ~FAULT [pin 13] - AGND [pin 1] - AVDD [pin 5] - BIAS [pin 2] - DGND [pin 14] - DNC [pin 6] - DVDD [pin 8] - SCK [pin 10] - SDI [pin 12] - SDO [pin 11] - T- [pin 3] - T+ [pin 4] ### U2 — [MP2315SGJ-P](https://www.flux.ai/adrian95/mp2315sgj-p~zqn.md) - Role: Power Conversion - Manufacturer Part Number: MP2315SGJ-P - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Integrated Circuit - Manufacturer Name: Monolithic Power Systems Inc. - Datasheet URL: https://www.mouser.com/datasheet/2/277/MP2315S-2945733.pdf - Role Details: LOCKED REV-FINAL: MP2315 12V-to-5V buck. Input from +12V_FUSED, output is +5V. This is the only 12V-to-5V converter. **Pins:** - AAM [pin 1] - BST [pin 5] - EN [pin 6] - FB [pin 8] - GND [pin 4] - IN [pin 2] - SW [pin 3] - VCC [pin 7] ### U20 — [TCA9555PWR](https://www.flux.ai/jecstronic/tca9555pwr~buk.md) - Manufacturer Part Number: TCA9555PWR - License: https://creativecommons.org/licenses/by/4.0/ - Role: I/O Expander - Part Type: Integrated Circuit - Datasheet URL: https://www.ti.com/general/docs/suppproductinfo.tsp?distId=10&gotoUrl=https%3A%2F%2Fwww.ti.com%2Flit%2Fgpn%2Ftca9555 - Manufacturer Name: Texas Instruments - Role Details: TCA9555 at I2C address 0x21; polled; drives 8 SSR low-side FET gates **Pins:** - ~INT [pin 1] - A0 [pin 21] - A1 [pin 2] - A2 [pin 3] - GND [pin 12] - P00 [pin 4] - P01 [pin 5] - P02 [pin 6] - P03 [pin 7] - P04 [pin 8] - P05 [pin 9] - P06 [pin 10] - P07 [pin 11] - P10 [pin 13] - P11 [pin 14] - P12 [pin 15] - P13 [pin 16] - P14 [pin 17] - P15 [pin 18] - P16 [pin 19] - P17 [pin 20] - SCL [pin 22] - SDA [pin 23] - VCC [pin 24] ### U3 — [CDSOT23-SM712](https://www.flux.ai/jecstronic/cdsot23-sm712~xbk.md) - Part Type: Diode - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Name: Bourns Inc. - Datasheet URL: https://www.bourns.com/docs/Product-Datasheets/CDSOT23-SM712.pdf - Role: Protection - Manufacturer Part Number: CDSOT23-SM712 - Role Details: SM712 TVS for thermocouple input protection **Pins:** - GND [pin 3] - I/O_1 [pin 1] - I/O_2 [pin 2] ### U30 — [TCA9554PWR](https://www.flux.ai/jecstronic/tca9554pwr~46t.md) - Datasheet URL: https://www.ti.com/general/docs/suppproductinfo.tsp?distId=10&gotoUrl=https%3A%2F%2Fwww.ti.com%2Flit%2Fgpn%2Ftca9554 - Manufacturer Name: Texas Instruments - Part Type: Integrated Circuit - Role Details: TCA9554 at I2C address 0x20; polled peripheral IO expander - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Part Number: TCA9554PWR - Role: I/O Expander **Pins:** - ~INT~ [pin 13] - A0 [pin 1] - A1 [pin 2] - A2 [pin 3] - GND [pin 8] - P0 [pin 4] - P1 [pin 5] - P2 [pin 6] - P3 [pin 7] - P4 [pin 9] - P5 [pin 10] - P6 [pin 11] - P7 [pin 12] - SCL [pin 14] - SDA [pin 15] - VDD [pin 16] ### U31 — [PCF85063AT/AAZ](https://www.flux.ai/adrian95/pcf85063ataaz~086.md) - Manufacturer Part Number: PCF85063AT/AAZ - Datasheet URL: http://www.nxp.com/docs/en/data-sheet/PCF85063A.pdf - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Name: NXP USA Inc. - Part Type: Integrated Circuit - Role: RTC - Role Details: PCF85063A real-time clock at 0x51 with 32.768kHz crystal and CR1220 backup **Pins:** - ~INT [pin 3] - CLKOUT [pin 7] - OSCI [pin 1] - OSCO [pin 2] - SCL [pin 6] - SDA [pin 5] - VDD [pin 8] - VSS [pin 4] ### U35 — [SN65HVD230DR](https://www.flux.ai/vasy_skral/sn65hvd230dr~uf0.md) - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Integrated Circuit - Manufacturer Part Number: SN65HVD230DR - Manufacturer Name: Texas Instruments - Datasheet URL: https://www.ti.com/general/docs/suppproductinfo.tsp?distId=10&gotoUrl=https%3A%2F%2Fwww.ti.com%2Flit%2Fgpn%2Fsn65hvd230 - Role Details: SN65HVD230 on ESP32-S3 GPIO43 TX / GPIO44 RX with CAN TVS and common-mode choke - Role: CAN Transceiver **Pins:** - CANH [pin 7] - CANL [pin 6] - D [pin 1] - GND [pin 2] - R [pin 4] - Rs [pin 8] - VCC [pin 3] - Vref [pin 5] ### U3A — [LM66100DCKR](https://www.flux.ai/lcsc/lm66100dckr~n7rd.md) - JLCPCB Part Class: Extended Part - Role: Ideal-OR Power Path - Package or Case Code: SC-70-6_L2.0-W1.3-P0.65-LS2.1-BL - Manufacturer Part Number: LM66100DCKR - Part Type: Integrated Circuit - LCSC Part Number: C2869734 - Manufacturer Name: TI(德州仪器) - Role Details: POPULATED REV-FINAL: LM66100 ideal-OR / backup-power path element. Must not be DNP. Use only within 1.5–5.5V domain; never connect to 12V. Exact AXP SYS vs battery-backed 5V topology is OPEN EE REVIEW; schematic intent is battery-backed AP63203 input so +3V3 holds up briefly after 12V loss. - Symbol Style: parametric-v1 - Datasheet URL: https://www.ti.com/general/docs/suppproductinfo.tsp?distId=10&gotoUrl=https%3A%2F%2Fwww.ti.com%2Flit%2Fgpn%2flm66100 **Pins:** - ~{CE} [pin 3] - GND [pin 2] - NC [pin 4] - ST [pin 5] - VIN [pin 1] - VOUT [pin 6] ### U3B — [LM66100DCKR](https://www.flux.ai/lcsc/lm66100dckr~n7rd.md) - Part Type: Integrated Circuit - LCSC Part Number: C2869734 - JLCPCB Part Class: Extended Part - Package or Case Code: SC-70-6_L2.0-W1.3-P0.65-LS2.1-BL - Manufacturer Part Number: LM66100DCKR - Role: Ideal-OR Power Path - Manufacturer Name: TI(德州仪器) - Symbol Style: parametric-v1 - Role Details: POPULATED REV-FINAL: LM66100 ideal-OR / backup-power path element. Must not be DNP. Use only within 1.5–5.5V domain; never connect to 12V. Exact AXP SYS vs battery-backed 5V topology is OPEN EE REVIEW; schematic intent is battery-backed AP63203 input so +3V3 holds up briefly after 12V loss. - Datasheet URL: https://www.ti.com/general/docs/suppproductinfo.tsp?distId=10&gotoUrl=https%3A%2F%2Fwww.ti.com%2Flit%2Fgpn%2flm66100 **Pins:** - ~{CE} [pin 3] - GND [pin 2] - NC [pin 4] - ST [pin 5] - VIN [pin 1] - VOUT [pin 6] ### U40 — [24AA02T-I/OT](https://www.flux.ai/adrian95/24aa02t-iot~qr2.md) - License: https://creativecommons.org/licenses/by/4.0/ - Role: ID EEPROM - Manufacturer Part Number: 24AA02T-I/OT - Manufacturer Name: Microchip Technology Inc. - Part Type: Integrated Circuit - Role Details: 24AA02 mezzanine ID EEPROM at 0x50 on display FRU/mezzanine interface - Datasheet URL: https://ww1.microchip.com/downloads/en/DeviceDoc/24AA02-24LC02B-24FC02-2K-I2C-Serial-EEPROM-20001709N.pdf **Pins:** - SCL [pin 1] - SDA [pin 3] - VCC [pin 4] - VSS [pin 2] - WP [pin 5] ### U6 — [CDSOT23-SM712](https://www.flux.ai/jecstronic/cdsot23-sm712~xbk.md) - Role Details: SM712 TVS for thermocouple input protection - Role: Protection - Manufacturer Name: Bourns Inc. - Manufacturer Part Number: CDSOT23-SM712 - Datasheet URL: https://www.bourns.com/docs/Product-Datasheets/CDSOT23-SM712.pdf - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Diode **Pins:** - GND [pin 3] - I/O_1 [pin 1] - I/O_2 [pin 2] ### U7 — [AXP2101](https://www.flux.ai/lcsc/axp2101~wwin.md) - Package or Case Code: QFN-40_L5.0-W5.0-P0.40-TL-EP3.4 - LCSC Part Number: C3036461 - Role: PMIC - Part Type: Microcontroller Units (MCUs/MPUs/SOCs) - Manufacturer Part Number: AXP2101 - Manufacturer Name: x-powers - Role Details: LOCKED REV-FINAL: AXP2101 charge/backup PMIC on +5V from U2. Charges LiPo and provides battery-backed system/backup path through U3A/U3B LM66100. It is not the final +3V3 source. - JLCPCB Part Class: Extended Part **Pins:** - ALDO1 [pin 18] - ALDO2 [pin 19] - ALDO3 [pin 16] - ALDO4 [pin 15] - ALDOIN [pin 17] - BAT [pin 33] - BLDO1 [pin 12] - BLDO2 [pin 14] - BLDOIN [pin 13] - CHGLED [pin 1] - CPULDOS [pin 10] - DLDO1/DC1SW [pin 20] - DLDO2/DC4SW [pin 11] - EP [pin 41] - FB1 [pin 21] - FB2 [pin 26] - FB3 [pin 4] - FB4 [pin 9] - GND [pin 3] - GPIO1/FB5/RTC/LDO2 [pin 32] - IRQ [pin 38] - LX1 [pin 22] - LX2 [pin 25] - LX3 [pin 5] - LX4 [pin 8] - PWROK [pin 29] - PWRON [pin 30] - SCK [pin 40] - SDA [pin 39] - SW [pin 35] - TS [pin 31] - VBACKUP [pin 27] - VBUS [pin 37] - VIN1 [pin 23] - VIN2 [pin 24] - VIN3 [pin 6] - VIN4 [pin 7] - VMID [pin 36] - VREF [pin 2] - VRTC [pin 28] - VSYS [pin 34] ### U8 — [AP63203WU-7](https://www.flux.ai/adrian95/ap63203wu-7~o8a.md) - Role Details: LOCKED REV-FINAL: AP63203 is the ONLY +3V3 source. VIN must be fed from a battery-backed system node for graceful shutdown hold-up, not raw MP2315 +5V alone. Exact backup topology is OPEN EE REVIEW. - Manufacturer Part Number: AP63203WU-7 - Datasheet URL: https://www.diodes.com/assets/Datasheets/AP63200-AP63201-AP63203-AP63205.pdf - Role: Power Conversion - Manufacturer Name: Diodes Incorporated - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Integrated Circuit **Pins:** - BST [pin 6] - EN [pin 2] - FB [pin 1] - GND [pin 4] - SW [pin 5] - VIN [pin 3] ### Y1 — [ABS07-32.768KHZ-T](https://www.flux.ai/adrian95/abs07-32768khz-t~822.md) - License: https://creativecommons.org/licenses/by/4.0/ - Datasheet URL: https://abracon.com/Resonators/ABS07.pdf - Part Type: Oscillator - Role Details: 32.768 kHz crystal for U31 PCF85063A OSCI/OSCO. Crystal CL=12.5pF; PCF85063A has selectable internal load capacitance, external C0G caps placed for EE confirmation/tuning. - Manufacturer Part Number: ABS07-32.768KHZ-T - Manufacturer Name: Abracon LLC - Role: Timing **Pins:** - P1 [pin 1] - P2 [pin 2] *The full schematic, PCB layout, bill of materials, and interactive design are available at [https://www.flux.ai/mikanik/tcs-sc-core-baseboard-v1~w1](https://www.flux.ai/mikanik/tcs-sc-core-baseboard-v1~w1).* --- *Generated from [https://www.flux.ai/mikanik/tcs-sc-core-baseboard-v1~w1](https://www.flux.ai/mikanik/tcs-sc-core-baseboard-v1~w1)*