# 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~5cuh.md) - Role: Flyback Protection - Manufacturer Name: DIODES(美台) - 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 - Part Type: Switching Diode - Package: SOD-123 - JLCPCB Part Class: Extended Part - Manufacturer Part Number: 1N4148W-13-F - LCSC Part Number: C112342 - Package or Case Code: SOD-123_L2.7-W1.6-LS3.7-RD - Product Info Url: https://lcsc.com/product-detail/Switching-Diode_DIODES_1N4148W-13-F_1N4148W-13-F_C112342.html **Pins:** - 1 [pin 1] - 2 [pin 2] ### D3 — [SML-LX0603GW-TR](https://www.flux.ai/adrian95/sml-lx0603gw-tr~uqi.md) - Role Details: General status indicator from MCU GPIO - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Part Number: SML-LX0603GW-TR - Role: Status LED - Part Type: LED - Datasheet URL: https://www.lumex.com/spec/SML-LX0603GW-TR.pdf - Package: 0603 - Manufacturer Name: Lumex Opto/Components Inc. **Pins:** - A [pin 2] - K [pin 1] ### D4 — [SML-LX0603GW-TR](https://www.flux.ai/adrian95/sml-lx0603gw-tr~uqi.md) - Role Details: Charge status indicator from charger status output - License: https://creativecommons.org/licenses/by/4.0/ - Package: 0603 - Manufacturer Part Number: SML-LX0603GW-TR - Role: Charge LED - Manufacturer Name: Lumex Opto/Components Inc. - Part Type: LED - Datasheet URL: https://www.lumex.com/spec/SML-LX0603GW-TR.pdf **Pins:** - A [pin 2] - K [pin 1] ### D5 — [SS34](https://www.flux.ai/lcsc/ss34~6q67.md) - Reverse Voltage: 40V - JLCPCB Part Class: Extended Part - Package: SMB - Forward Voltage: 0.3V to 0.45V - Role: Input Protection - Manufacturer Part Number: SS34 - Package or Case Code: SMB_L4.3-W3.6-LS5.4-RD - Role Details: Schottky diode from USB VBUS into charger input path - Manufacturer Name: UMW(友台半导体) - Part Type: Schottky Barrier Diodes (SBD) - Diode Type: Schottky - LCSC Part Number: C2758511 **Pins:** - A [pin 2] - K [pin 1] ### D6 — [SML-LX0603GW-TR](https://www.flux.ai/adrian95/sml-lx0603gw-tr~uqi.md) - Manufacturer Part Number: SML-LX0603GW-TR - License: https://creativecommons.org/licenses/by/4.0/ - Role Details: Charge complete or standby indicator from charger status output - Part Type: LED - Datasheet URL: https://www.lumex.com/spec/SML-LX0603GW-TR.pdf - Role: Standby LED - Manufacturer Name: Lumex Opto/Components Inc. - Package: 0603 **Pins:** - A [pin 2] - K [pin 1] ### J1 — [USB4105-GF-A](https://www.flux.ai/adrian95/usb4105-gf-a~im9.md) - Part Type: USB C - License: https://creativecommons.org/licenses/by/4.0/ - Datasheet URL: https://mm.digikey.com/Volume0/opasdata/d220001/medias/docus/5492/USB4105.pdf - Package: USB-C - Manufacturer Name: GCT - Manufacturer Name: GCT - Role: USB Connector - Role Details: Board edge USB-C for 5V input and USB2 data - Manufacturer Part Number: USB4105-GF-A **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~2xb.md) - Package: Nano SIM - Role Details: Nano SIM interface for LTE modem - Role: SIM Connector - Manufacturer Name: GCT - Part Type: Connector - Datasheet URL: https://media.digikey.com/pdf/Data%20Sheets/GCT%20PDFs/SIM8051_Spec.pdf - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Part Number: SIM8051-6-0-14-00-A **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~b96.md) - Manufacturer Part Number: S2B-PH-SM4-TB(LF)(SN) - Datasheet URL: https://www.jst-mfg.com/product/pdf/eng/ePH.pdf - Manufacturer Name: JST Sales America Inc. - License: https://creativecommons.org/licenses/by/4.0/ - Role: Battery Connector - Role Details: 2-pin LiPo battery input connector - Package: JST-PH-2 - Part Type: Connector **Pins:** - P1 [pin 1] - P2 [pin 2] ### J4 — [U.FL-R-SMT-1(10)](https://www.flux.ai/jecstronic/upfl-r-smt-110~du.md) - Datasheet URL: https://media.digikey.com/pdf/Data%20Sheets/Hirose%20PDFs/EDC3-302540-10.tif.pdf - Role Details: GNSS antenna connector - Part Type: Connector - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Name: Hirose Electric Co Ltd - Manufacturer Part Number: U.FL-R-SMT-1(10) - Package: U.FL - 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~du.md) - Manufacturer Name: Hirose Electric Co Ltd - Package: U.FL - Role: RF Connector - Manufacturer Part Number: U.FL-R-SMT-1(10) - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Connector - Datasheet URL: https://media.digikey.com/pdf/Data%20Sheets/Hirose%20PDFs/EDC3-302540-10.tif.pdf - Role Details: LTE antenna 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~g1u.md) - License: https://creativecommons.org/licenses/by/4.0/ - Role Details: 4-pin external audio or accessory connector - Package: JST-SH-4 - Part Type: 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~pl.md) - Role Details: Dual MOSFET paired with DW01A for pack protection - Manufacturer Name: TECH PUBLIC - Role: Battery Protection MOSFET - Datasheet URL: https://datasheet.lcsc.com/lcsc/2108132230_TECH-PUBLIC-FS8205A_C2830320.pdf - Part Type: Integrated Circuit - Package: SOT-23-6 - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Part Number: FS8205A **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/2n7002~13ip.md) - Package: SOT-23 - Product Info Url: https://lcsc.com/product-detail/MOSFET_MDD-Microdiode-Electronics-2N7002_C472906.html - Continuous Drain Current: 200mA at 25°C - LCSC Part Number: C472906 - Part Type: MOSFETs - JLCPCB Part Class: Extended Part - Role: Motor Driver - Role Details: Low-side MOSFET driver for vibration motor - Manufacturer Name: MDD(辰达半导体) - Drain to Source Voltage: 60V - Manufacturer Part Number: 2N7002 - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2407101108_MDD-Microdiode-Semiconductor-2N7002_C472906.pdf - Transistor Type: N-channel MOSFET - Package or Case Code: SOT-23-3_L2.9-W1.5-P1.90-LS2.6-BR **Pins:** - D [pin 3] - G [pin 1] - S [pin 2] ### SW1 — [TL3342F160QG/TR](https://www.flux.ai/adrian95/tl3342f160qgtr~415.md) - Manufacturer Name: E-Switch - Manufacturer Part Number: TL3342F160QG - Role Details: Boot or user input switch to ground - License: https://creativecommons.org/licenses/by/4.0/ - Datasheet URL: https://sten-eswitch-13110800-production.s3.amazonaws.com/system/asset/product_line/data_sheet/165/TL3342.pdf - Mount: Surface Mount - Role: User Switch - Part Type: Switch - Package: SMD **Pins:** - 1 [pin 1] - 2 [pin 2] - 3 [pin 3] - 4 [pin 4] ### SW2 — [TL3342F160QG/TR](https://www.flux.ai/adrian95/tl3342f160qgtr~415.md) - Part Type: Switch - Package: SMD - Datasheet URL: https://sten-eswitch-13110800-production.s3.amazonaws.com/system/asset/product_line/data_sheet/165/TL3342.pdf - Mount: Surface Mount - License: https://creativecommons.org/licenses/by/4.0/ - Role Details: Reset input pulling EN low - Manufacturer Part Number: TL3342F160QG - Manufacturer Name: E-Switch - Role: Reset Switch **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-n4~0jh.md) - Part Type: RF module - Role Details: ESP32-C6 module with native USB and GPIO for LTE, GNSS, I2C, I2S, LEDs, switches, and motor control - Manufacturer Part Number: ESP32-C6-MINI-1-N4 - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Name: Espressif Systems - Role: Main MCU - Datasheet URL: https://www.espressif.com/sites/default/files/documentation/esp32-c6-mini-1_mini-1u_datasheet_en.pdf - Package: Module **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/max17048gplust10~3vm.md) - Part Type: Integrated Circuit - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Part Number: MAX17048G+T10 - Manufacturer Name: Analog Devices Inc./Maxim Integrated - Role: Fuel Gauge - Datasheet URL: https://www.analog.com/media/en/technical-documentation/data-sheets/MAX17048-MAX17049.pdf - Package: TDFN-8 - Role Details: Single-cell Li-ion fuel gauge on I2C **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~l9e.md) - Role Details: Protect USB D+, D-, and VBUS at connector - Package: SOT-143 - Manufacturer Name: Texas Instruments Inc. - Manufacturer Part Number: SP0503BAHT - Package or Case Code: SOT-143 - Datasheet URL: http://www.littelfuse.com//media/files/littelfuse/technical%20resources/documents/data%20sheets/sp05xxba.pdf - Role: ESD Protection **Pins:** - A [pin 1] - K [pin 3] - K [pin 4] - K [pin 2] ### U2 — [SIM7080G](https://www.flux.ai/adrian95/sim7080g~pyr.md) - Manufacturer Part Number: SIM7080G - Role Details: SIM7080G LTE modem placeholder per approved plan - Package: Module - Role: LTE Modem - Part Type: Integrated Circuit - Datasheet URL: https://www.waveshare.com/w/upload/e/e7/SIM7080G_Hardware_Design_V1.03.pdf - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Name: SIMCom Wireless Solutions Limited **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~tpv8.md) - Package or Case Code: GPSM-SMD_18P-L10.1-W9.7-P1.10 - Part Type: Satellite Positioning Modules - LCSC Part Number: C2916234 - Manufacturer Name: Quectel(移远) - JLCPCB Part Class: Extended Part - Package: GPSM-SMD_18P-L10.1-W9.7-P1.10 - Role: GNSS Module - Role Details: L76KB-A58 GNSS placeholder per approved plan - Manufacturer Part Number: L76KB-A58 **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~au8i.md) - Part Type: Translators / Level Shifters - Role Details: Bidirectional 2-bit translator for LTE UART between ESP32 and modem 1.8V domain - LCSC Part Number: C2677366 - JLCPCB Part Class: Extended Part - Manufacturer Part Number: TXB0102DCUT - Package or Case Code: VSSOP-8_L2.3-W2.0-P0.50-LS3.1-BL - Manufacturer Name: TI(德州仪器) - Role: Level Shifter - Package: VSSOP-8 **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~w31.md) - Manufacturer Part Number: ICS-43434 - Part Type: Audio Product - Manufacturer Name: TDK InvenSense - Role: MEMS Microphone - Role Details: I2S digital microphone for audio capture - License: https://creativecommons.org/licenses/by/4.0/ - Package: LGA-6 - Datasheet URL: https://www.verical.com/datasheet/invensense-microphones-ICS-43434-7218944.pdf **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~a2.md) - Part Type: LDO - Manufacturer Name: MICRONE(Nanjing Micro One Elec) - Role Details: VBAT to 3.3V regulator for MCU and peripherals - Package: SOT-23-5 - Role: LDO - 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~xa.md) - Role: Charger - Package: SOP-8 - Datasheet URL: https://dlnmh9ip6v2uc.cloudfront.net/datasheets/Prototyping/TP4056.pdf - Manufacturer Name: NanJing Top Power ASIC Corp. - Manufacturer Part Number: TP4056 - Part Type: Integrated Circuit - Role Details: USB powered single-cell Li-ion charger - License: https://creativecommons.org/licenses/by/4.0/ **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~5i1g.md) - Role: Battery Protection - Role Details: Single-cell protection controller for Li-ion battery pack - Manufacturer Name: FORTUNE(富晶) - JLCPCB Part Class: Extended Part - Package: SOT-23-6 - Manufacturer Part Number: DW01A+G - Package or Case Code: SOT-23-6_L2.9-W1.6-P0.95-LS2.8-BR - LCSC Part Number: C3020699 **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~ufe2.md) - Package or Case Code: LGA-12_L2.0-W2.0-P0.50-BL - Termination: 16-pin LGA - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/1810010329_STMicroelectronics-LIS2DH12TR_C110926.pdf - Manufacturer Name: ST(意法半导体) - Role Details: I2C accelerometer with interrupt output - Part Type: Motion Sensors - Accelerometers - Manufacturer Part Number: LIS2DH12TR - Sensor Type: 3-axis digital accelerometer - LCSC Part Number: C110926 - Role: Accelerometer - Package: LGA-12 - JLCPCB Part Class: Extended Part - Product Info Url: https://lcsc.com/product-detail/Motion-Sensors-Accelerometers_STMicroelectronics_LIS2DH12TR_STMicroelectronics-LIS2DH12TR_C110926.html **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~46](https://www.flux.ai/spiadmin5/iot-edge-connector-placement-requirements~46).* --- *Generated from [https://www.flux.ai/spiadmin5/iot-edge-connector-placement-requirements~46](https://www.flux.ai/spiadmin5/iot-edge-connector-placement-requirements~46)*