# IoT Edge-Connector Placement Requirements ## Description Requirements update for an IoT PCB module emphasizing compact placement around the main MCU and board-edge connector positioning for easier assembly. Includes mechanical constraints, connector orientation expectations, keep-out guidance, and acceptance criteria for the next layout phase. ## Project Details - **Owner:** spiadmin5 - **Created:** 4/1/2026 - **Last Updated:** 4/2/2026 - **Visibility:** Public - **Implementation Details:** Revised layout requirements: use compact component placement centered around the main MCU; keep all connectors on the board edge for accessible assembly. Verify board dimensions and connector edge-access on all sides. Group MCU support parts tightly around the MCU, including decoupling, clocking, level shifting, and short critical signal paths. Keep noisy power and RF pathways separated from sensitive MCU and sensor routing. Define connector orientation so mating direction is outward from the board edge, maintain assembly handling clearance around each connector, and preserve local keep-out where cable bodies, antenna connectors, or acoustic openings require unobstructed access. Acceptance criteria for the next layout phase: connectors are edge-mounted and accessible, MCU support circuitry is tightly clustered with short local interconnects, critical pathways are not obstructed by connector placement, and the layout can proceed using these requirements as the governing board-level constraints. ## Key Components ### D2 — [1N4148W-13-F](https://www.flux.ai/lcsc/1n4148w-13-f.md) - Package: SOD-123 - LCSC Part Number: C112342 - Manufacturer Part Number: 1N4148W-13-F - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2304140030_Diodes-Incorporated-1N4148W-13-F_C112342.pdf - Role Details: Flyback diode across vibration motor pads - Role: Flyback Protection - Part Type: Switching Diode - Product Info Url: https://lcsc.com/product-detail/Switching-Diode_DIODES_1N4148W-13-F_1N4148W-13-F_C112342.html - Manufacturer Name: DIODES(美台) - JLCPCB Part Class: Extended Part - Package or Case Code: SOD-123_L2.7-W1.6-LS3.7-RD **Pins:** - 1 [pin 1] - 2 [pin 2] ### D3 — [SML-LX0603GW-TR](https://www.flux.ai/adrian95/sml-lx0603gw-tr.md) - Manufacturer Name: Lumex Opto/Components Inc. - Part Type: LED - Manufacturer Part Number: SML-LX0603GW-TR - License: https://creativecommons.org/licenses/by/4.0/ - Role Details: General status indicator from MCU GPIO - Datasheet URL: https://www.lumex.com/spec/SML-LX0603GW-TR.pdf - Role: Status LED - Package: 0603 **Pins:** - A [pin 2] - K [pin 1] ### D4 — [SML-LX0603GW-TR](https://www.flux.ai/adrian95/sml-lx0603gw-tr.md) - License: https://creativecommons.org/licenses/by/4.0/ - Datasheet URL: https://www.lumex.com/spec/SML-LX0603GW-TR.pdf - Role: Charge LED - Package: 0603 - Part Type: LED - Manufacturer Name: Lumex Opto/Components Inc. - Role Details: Charge status indicator from charger status output - Manufacturer Part Number: SML-LX0603GW-TR **Pins:** - A [pin 2] - K [pin 1] ### D5 — [SS34](https://www.flux.ai/lcsc/ss34.md) - Reverse Voltage: 40V - LCSC Part Number: C2758511 - Part Type: Schottky Barrier Diodes (SBD) - Forward Voltage: 0.3V to 0.45V - Package or Case Code: SMB_L4.3-W3.6-LS5.4-RD - Package: SMB - Diode Type: Schottky - JLCPCB Part Class: Extended Part - Manufacturer Part Number: SS34 - Role: Input Protection - Role Details: Schottky diode from USB VBUS into charger input path - Manufacturer Name: UMW(友台半导体) **Pins:** - A [pin 2] - K [pin 1] ### D6 — [SML-LX0603GW-TR](https://www.flux.ai/adrian95/sml-lx0603gw-tr.md) - Role Details: Charge complete or standby indicator from charger status output - Package: 0603 - Datasheet URL: https://www.lumex.com/spec/SML-LX0603GW-TR.pdf - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Part Number: SML-LX0603GW-TR - Role: Standby LED - Manufacturer Name: Lumex Opto/Components Inc. - Part Type: LED **Pins:** - A [pin 2] - K [pin 1] ### J1 — [USB4105-GF-A](https://www.flux.ai/adrian95/usb4105-gf-a.md) - Package: USB-C - Role Details: Board edge USB-C for 5V input and USB2 data - Manufacturer Name: GCT - Part Type: USB C - Datasheet URL: https://mm.digikey.com/Volume0/opasdata/d220001/medias/docus/5492/USB4105.pdf - License: https://creativecommons.org/licenses/by/4.0/ - Role: USB Connector - Manufacturer Part Number: USB4105-GF-A - Manufacturer Name: GCT **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] ### J2 — [SIM8051-6-0-14-00-A](https://www.flux.ai/adrian95/sim8051-6-0-14-00-a.md) - Package: Nano SIM - Role Details: Nano SIM interface for LTE modem - Part Type: Connector - Manufacturer Part Number: SIM8051-6-0-14-00-A - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Name: GCT - Role: SIM Connector - Datasheet URL: https://media.digikey.com/pdf/Data%20Sheets/GCT%20PDFs/SIM8051_Spec.pdf **Pins:** - CLK [pin C3] - GND [pin C5] - I/O [pin C7] - RST [pin C2] - VCC [pin C1] - VPP [pin C6] ### J3 — [S2B-PH-SM4-TB(LF)(SN)](https://www.flux.ai/adrian95/s2b-ph-sm4-tblfsn.md) - Datasheet URL: https://www.jst-mfg.com/product/pdf/eng/ePH.pdf - Manufacturer Name: JST Sales America Inc. - Role: Battery Connector - Part Type: Connector - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Part Number: S2B-PH-SM4-TB(LF)(SN) - Role Details: 2-pin LiPo battery input connector - Package: JST-PH-2 **Pins:** - P1 [pin 1] - P2 [pin 2] ### J4 — [U.FL-R-SMT-1(10)](https://www.flux.ai/jecstronic/upfl-r-smt-110.md) - Manufacturer Name: Hirose Electric Co Ltd - Part Type: Connector - License: https://creativecommons.org/licenses/by/4.0/ - Package: U.FL - Role Details: GNSS antenna connector - Datasheet URL: https://media.digikey.com/pdf/Data%20Sheets/Hirose%20PDFs/EDC3-302540-10.tif.pdf - Manufacturer Part Number: U.FL-R-SMT-1(10) - Role: RF Connector **Pins:** - Center_Contact [pin 2] - Outer_Contact [pin 1] - Outer_Contact [pin 3] ### J5 — [U.FL-R-SMT-1(10)](https://www.flux.ai/jecstronic/upfl-r-smt-110.md) - Role: RF Connector - Manufacturer Part Number: U.FL-R-SMT-1(10) - Package: U.FL - Datasheet URL: https://media.digikey.com/pdf/Data%20Sheets/Hirose%20PDFs/EDC3-302540-10.tif.pdf - Role Details: LTE antenna connector - Manufacturer Name: Hirose Electric Co Ltd - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Connector **Pins:** - Center_Contact [pin 2] - Outer_Contact [pin 1] - Outer_Contact [pin 3] ### J6 — [JST_SH_BM04_1x04_P1.00mm_Vertical](https://www.flux.ai/jecstronic/jstshbm041x04p1p00mmvertical.md) - Part Type: Connector - Package: JST-SH-4 - License: https://creativecommons.org/licenses/by/4.0/ - Role Details: 4-pin external audio or accessory connector - Role: Accessory Connector **Pins:** - P1 [pin 1] - P2 [pin 2] - P3 [pin 3] - P4 [pin 4] ### Q1 — [FS8205A](https://www.flux.ai/klam23/fs8205a.md) - Manufacturer Part Number: FS8205A - Role: Battery Protection MOSFET - License: https://creativecommons.org/licenses/by/4.0/ - Package: SOT-23-6 - Datasheet URL: https://datasheet.lcsc.com/lcsc/2108132230_TECH-PUBLIC-FS8205A_C2830320.pdf - Role Details: Dual MOSFET paired with DW01A for pack protection - Manufacturer Name: TECH PUBLIC - Part Type: Integrated Circuit **Pins:** - D1/D2 [pin 3] - D1/D2 [pin 4] - G1 [pin 2] - G2 [pin 6] - S1 [pin 1] - S2 [pin 5] ### Q2 — [2N7002](https://www.flux.ai/lcsc/2n7002.md) - Part Type: MOSFETs - JLCPCB Part Class: Extended Part - Manufacturer Part Number: 2N7002 - Role Details: Low-side MOSFET driver for vibration motor - Transistor Type: N-channel MOSFET - Package: SOT-23 - Manufacturer Name: MDD(辰达半导体) - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2407101108_MDD-Microdiode-Semiconductor-2N7002_C472906.pdf - Package or Case Code: SOT-23-3_L2.9-W1.5-P1.90-LS2.6-BR - Continuous Drain Current: 200mA at 25°C - Product Info Url: https://lcsc.com/product-detail/MOSFET_MDD-Microdiode-Electronics-2N7002_C472906.html - LCSC Part Number: C472906 - Role: Motor Driver - Drain to Source Voltage: 60V **Pins:** - D [pin 3] - G [pin 1] - S [pin 2] ### SW1 — [TL3342F160QG/TR](https://www.flux.ai/adrian95/tl3342f160qgtr.md) - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Part Number: TL3342F160QG - Role Details: Boot or user input switch to ground - Package: SMD - Part Type: Switch - Manufacturer Name: E-Switch - Datasheet URL: https://sten-eswitch-13110800-production.s3.amazonaws.com/system/asset/product_line/data_sheet/165/TL3342.pdf - Role: User Switch - Mount: Surface Mount **Pins:** - 1 [pin 1] - 2 [pin 2] - 3 [pin 3] - 4 [pin 4] ### SW2 — [TL3342F160QG/TR](https://www.flux.ai/adrian95/tl3342f160qgtr.md) - Mount: Surface Mount - Package: SMD - Datasheet URL: https://sten-eswitch-13110800-production.s3.amazonaws.com/system/asset/product_line/data_sheet/165/TL3342.pdf - Role: Reset Switch - Part Type: Switch - Manufacturer Name: E-Switch - Role Details: Reset input pulling EN low - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Part Number: TL3342F160QG **Pins:** - 1 [pin 1] - 2 [pin 2] - 3 [pin 3] - 4 [pin 4] ### U1 — [ESP32-C6-MINI-1-N4](https://www.flux.ai/vasyl/esp32-c6-mini-1-n4.md) - Part Type: RF module - Manufacturer Part Number: ESP32-C6-MINI-1-N4 - Datasheet URL: https://www.espressif.com/sites/default/files/documentation/esp32-c6-mini-1_mini-1u_datasheet_en.pdf - License: https://creativecommons.org/licenses/by/4.0/ - Role: Main MCU - Manufacturer Name: Espressif Systems - Package: Module - Role Details: ESP32-C6 module with native USB and GPIO for LTE, GNSS, I2C, I2S, LEDs, switches, and motor control **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] ### U10 — [MAX17048G+T10](https://www.flux.ai/adrian95/max17048gplust10.md) - License: https://creativecommons.org/licenses/by/4.0/ - Package: TDFN-8 - Part Type: Integrated Circuit - Datasheet URL: https://www.analog.com/media/en/technical-documentation/data-sheets/MAX17048-MAX17049.pdf - Manufacturer Part Number: MAX17048G+T10 - Role Details: Single-cell Li-ion fuel gauge on I2C - Manufacturer Name: Analog Devices Inc./Maxim Integrated - Role: Fuel Gauge **Pins:** - ~ALERT [pin 5] - CELL [pin 2] - CTG [pin 1] - EP [pin 9] - GND [pin 4] - QSTRT [pin 6] - SCL [pin 7] - SDA [pin 8] - VDD [pin 3] ### U11 — [SP0503BAHT](https://www.flux.ai/kicad-part-library/sp0503baht.md) - Datasheet URL: http://www.littelfuse.com//media/files/littelfuse/technical%20resources/documents/data%20sheets/sp05xxba.pdf - Package or Case Code: SOT-143 - Package: SOT-143 - Role Details: Protect USB D+, D-, and VBUS at connector - Manufacturer Part Number: SP0503BAHT - Manufacturer Name: Texas Instruments Inc. - Role: ESD Protection **Pins:** - A [pin 1] - K [pin 3] - K [pin 4] - K [pin 2] ### U2 — [SIM7080G](https://www.flux.ai/adrian95/sim7080g.md) - Package: Module - Role: LTE Modem - Manufacturer Name: SIMCom Wireless Solutions Limited - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Part Number: SIM7080G - Role Details: SIM7080G LTE modem placeholder per approved plan - Datasheet URL: https://www.waveshare.com/w/upload/e/e7/SIM7080G_Hardware_Design_V1.03.pdf - Part Type: Integrated Circuit **Pins:** - ~SPI_MOSI [pin 49] - ~USB_BOOT [pin 20] - ADC [pin 38] - ANT_CONTROL0 [pin 44] - ANT_CONTROL1 [pin 43] - GND_1 [pin 8] - GND_10 [pin 37] - GND_11 [pin 45] - GND_12 [pin 63] - GND_13 [pin 66] - GND_14 [pin 67] - GND_15 [pin 69] - GND_16 [pin 70] - GND_17 [pin 71] - GND_18 [pin 72] - GND_19 [pin 73] - GND_2 [pin 13] - GND_20 [pin 74] - GND_21 [pin 75] - GND_22 [pin 76] - GND_23 [pin 77] - GND_3 [pin 19] - GND_4 [pin 21] - GND_5 [pin 27] - GND_6 [pin 30] - GND_7 [pin 31] - GND_8 [pin 33] - GND_9 [pin 36] - GNSS_ANT [pin 68] - GPIO1 [pin 57] - GPIO2 [pin 58] - GPIO3 [pin 59] - GPIO4 [pin 60] - GPIO5 [pin 14] - I2C_SCL [pin 65] - I2C_SDA [pin 64] - NC_1 [pin 28] - NC_2 [pin 29] - NC_3 [pin 46] - NC_4 [pin 47] - NC_5 [pin 52] - NC_6 [pin 53] - NC_7 [pin 54] - NC_8 [pin 55] - NC_9 [pin 56] - NETLIGHT [pin 41] - PCM_CLK [pin 11] - PCM_DIN [pin 9] - PCM_DOUT [pin 10] - PCM_SYNC [pin 12] - PWRKEY [pin 39] - RF_ANT [pin 32] - SIM_CLK [pin 16] - SIM_DATA [pin 15] - SIM_RST [pin 17] - SIM_VDD [pin 18] - SPI_CLK [pin 50] - SPI_CS [pin 48] - SPI_MISO [pin 51] - STATUS [pin 42] - UART1_CTS [pin 4] - UART1_DCD [pin 5] - UART1_DTR [pin 6] - UART1_RI [pin 7] - UART1_RTS [pin 3] - UART1_RXD [pin 2] - UART1_TXD [pin 1] - UART2_RXD [pin 23] - UART2_TXD [pin 22] - UART3_RXD [pin 62] - UART3_TXD [pin 61] - USB_DM [pin 26] - USB_DP [pin 25] - USB_VBUS [pin 24] - VBAT_1 [pin 34] - VBAT_2 [pin 35] - VDD_EXT [pin 40] ### U3 — [L76KB-A58](https://www.flux.ai/lcsc/l76kb-a58.md) - Part Type: Satellite Positioning Modules - Manufacturer Part Number: L76KB-A58 - Manufacturer Name: Quectel(移远) - Role: GNSS Module - JLCPCB Part Class: Extended Part - LCSC Part Number: C2916234 - Package or Case Code: GPSM-SMD_18P-L10.1-W9.7-P1.10 - Package: GPSM-SMD_18P-L10.1-W9.7-P1.10 - Role Details: L76KB-A58 GNSS placeholder per approved plan **Pins:** - 1PPS [pin 4] - ANTON [pin 13] - GND [pin 10] - GND [pin 12] - GND [pin 1] - RESERVED [pin 15] - RESERVED [pin 7] - RESERVED [pin 16] - RESERVED [pin 17] - RESET_N [pin 9] - RF_IN [pin 11] - RXD [pin 3] - SET [pin 18] - TXD [pin 2] - V_BCKP [pin 6] - VCC [pin 8] - VDD_RF [pin 14] - WAKE_UP [pin 5] ### U4 — [TXB0102DCUT](https://www.flux.ai/lcsc/txb0102dcut.md) - Package or Case Code: VSSOP-8_L2.3-W2.0-P0.50-LS3.1-BL - Role: Level Shifter - Manufacturer Name: TI(德州仪器) - Package: VSSOP-8 - Role Details: Bidirectional 2-bit translator for LTE UART between ESP32 and modem 1.8V domain - LCSC Part Number: C2677366 - Manufacturer Part Number: TXB0102DCUT - Part Type: Translators / Level Shifters - JLCPCB Part Class: Extended Part **Pins:** - A1 [pin 5] - A2 [pin 4] - B1 [pin 8] - B2 [pin 1] - GND [pin 2] - OE [pin 6] - VCCA [pin 3] - VCCB [pin 7] ### U5 — [ICS-43434](https://www.flux.ai/adrian95/ics-43434.md) - Datasheet URL: https://www.verical.com/datasheet/invensense-microphones-ICS-43434-7218944.pdf - Package: LGA-6 - Role: MEMS Microphone - Role Details: I2S digital microphone for audio capture - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Part Number: ICS-43434 - Part Type: Audio Product - Manufacturer Name: TDK InvenSense **Pins:** - GND [pin 3] - LR [pin 2] - SCK [pin 4] - SD [pin 6] - VDD [pin 5] - WS [pin 1] ### U6 — [ME6211C33M5G-N](https://www.flux.ai/jecstronic/me6211c33m5g-n.md) - Package: SOT-23-5 - Part Type: LDO - Role Details: VBAT to 3.3V regulator for MCU and peripherals - Role: LDO - Manufacturer Name: MICRONE(Nanjing Micro One Elec) - Manufacturer Part Number: ME6211C33M5G-N - Datasheet URL: https://datasheet.lcsc.com/lcsc/1811131510_MICRONE-Nanjing-Micro-One-Elec-ME6211C33M5G-N_C82942.pdf **Pins:** - CE - NC - VIN - VOUT - VSS ### U7 — [TP4056](https://www.flux.ai/vasy_skral/tp4056.md) - Role: Charger - Manufacturer Part Number: TP4056 - Datasheet URL: https://dlnmh9ip6v2uc.cloudfront.net/datasheets/Prototyping/TP4056.pdf - Package: SOP-8 - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Name: NanJing Top Power ASIC Corp. - Part Type: Integrated Circuit - Role Details: USB powered single-cell Li-ion charger **Pins:** - ~CHRG [pin 7] - ~STDBY [pin 6] - BAT [pin 5] - CE [pin 8] - EP [pin 9] - GND [pin 3] - PROG [pin 2] - TEMP [pin 1] - VCC [pin 4] ### U8 — [DW01A+G](https://www.flux.ai/lcsc/dw01aplusg.md) - Manufacturer Part Number: DW01A+G - LCSC Part Number: C3020699 - Package: SOT-23-6 - Role: Battery Protection - Package or Case Code: SOT-23-6_L2.9-W1.6-P0.95-LS2.8-BR - Role Details: Single-cell protection controller for Li-ion battery pack - JLCPCB Part Class: Extended Part - Manufacturer Name: FORTUNE(富晶) **Pins:** - CS [pin 2] - GND [pin 6] - OC [pin 3] - OD [pin 1] - TD [pin 4] - VCC [pin 5] ### U9 — [LIS2DH12TR](https://www.flux.ai/lcsc/lis2dh12tr.md) - Product Info Url: https://lcsc.com/product-detail/Motion-Sensors-Accelerometers_STMicroelectronics_LIS2DH12TR_STMicroelectronics-LIS2DH12TR_C110926.html - Manufacturer Name: ST(意法半导体) - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/1810010329_STMicroelectronics-LIS2DH12TR_C110926.pdf - Part Type: Motion Sensors - Accelerometers - Role Details: I2C accelerometer with interrupt output - Termination: 16-pin LGA - JLCPCB Part Class: Extended Part - Package or Case Code: LGA-12_L2.0-W2.0-P0.50-BL - Sensor Type: 3-axis digital accelerometer - LCSC Part Number: C110926 - Manufacturer Part Number: LIS2DH12TR - Role: Accelerometer - Package: LGA-12 **Pins:** - CS [pin 2] - GND [pin 8] - GND [pin 6] - GND [pin 7] - INT1 [pin 12] - INT2 [pin 11] - RES [pin 5] - SCL/SPC [pin 1] - SDA/SDI/SDO [pin 4] - SDO/SA0 [pin 3] - VDD [pin 9] - VDD_IO [pin 10] *The full schematic, PCB layout, bill of materials, and interactive design are available at [https://www.flux.ai/spiadmin5/iot-edge-connector-placement-requirements](https://www.flux.ai/spiadmin5/iot-edge-connector-placement-requirements).* --- *Generated from [https://www.flux.ai/spiadmin5/iot-edge-connector-placement-requirements](https://www.flux.ai/spiadmin5/iot-edge-connector-placement-requirements)*