# RallyComm I/O Box Rev A

## Description

Production\-intent automotive USB dock interface with protected 12 V input, STM32G0 USB CDC device, dual CAN interfaces, 5 V/3 A charge output, and switched 12 V keypad power\.

## Project Details

- **Owner:** jaredbeyer
- **Created:** 8/18/2026
- **Last Updated:** 8/19/2026
- **Visibility:** Public

## Key Components

### D1 — [SMAJ24A](https://flux.ai/lcsc/smaj24a~ienq.md)

- Role Details: 24 V unidirectional automotive input TVS
- Manufacturer Part Number: SMAJ24AHE3
- Role: Clamping
- Datasheet URL: https://storage\.googleapis\.com/graviton\-electric\-symbols/document\_assets/lcsc/2304140030\_Shikues\-SMAJ24A\_C499818\.pdf
- JLCPCB Part Class: Extended Part
- Manufacturer Name: Vishay
- Part Type: TVS
- LCSC Part Number: C499818
- Product Info Url: https://lcsc\.com/product\-detail/TVS\_Shikues\-SMAJ24A\_C499818\.html
- Package or Case Code: SMA\_L4\.3\-W2\.6\-LS5\.0\-RD
- Functional Group: Protected Automotive Input

**Pins:**
- A [pin 2]
- C [pin 1]

### D10 — [150060VS75000](https://flux.ai/silicon-yard/150060vs75000.md)

- Role Details: LED\_STATUS driven by PA10 as current sink
- Role: Status Indicator
- Datasheet URL: https://storage\.googleapis\.com/graviton\-electric\-symbols/document\_assets/user\-uploaded/4785c458b2c53f281c6149dd11617420e108d5d9a5c642541811a66a30135e21\.pdf
- Package or Case Code: R0603
- Part Type: LED
- Manufacturer Part Number: 150060VS75000
- Manufacturer Name: Würth Elektronik
- Functional Group: MCU Status

**Pins:**
- \- [pin 1]
- \+ [pin 2]

### D11 — [150060AS75000](https://flux.ai/adrian95/150060as75000~eol.md)

- Role: Signal Generation
- Role Details: Amber warning LED driven active\-low by PC13
- Forward Voltage: 2V
- Manufacturer Name: Würth Elektronik
- Manufacturer Part Number: 150060YS75000
- Part Type: LED
- Functional Group: MCU Status
- License: https://creativecommons\.org/licenses/by/4\.0/
- Datasheet URL: https://www\.we\-online\.com/catalog/datasheet/150060AS75000\.pdf

**Pins:**
- A [pin 2]
- K [pin 1]

### D2 — [STPS5H100BY\-TR](https://flux.ai/silicon-yard/stps5h100by-tr~4h.md)

- Role: Reverse Polarity Protection
- Max Reverse Voltage: 100V
- Part Type: Diode
- License: https://creativecommons\.org/licenses/by/4\.0/
- Role Details: AEC\-Q101 100 V 5 A DPAK series Schottky reverse\-battery block
- Manufacturer Name: STMicroelectronics
- Datasheet URL: https://www\.st\.com/content/ccc/resource/technical/document/datasheet/63/6b/b5/02/41/b5/47/f4/CD00280169\.pdf/files/CD00280169\.pdf/jcr:content/translations/en\.CD00280169\.pdf
- Manufacturer Part Number: STPS5H100BY\-TR
- Current Rating: 5A
- Package or Case Code: TO\-252\-3, DPAK \(2 Leads \+ Tab\), SC\-63
- Functional Group: Protected Automotive Input

**Pins:**
- A [pin 3]
- K [pin 2]
- NC [pin 1]

### D4 — [ESD2CAN24DBZRQ1](https://flux.ai/silicon-yard/esd2can24dbzrq1.md)

- Role: ESD Protection
- Manufacturer Name: Texas Instruments
- Role Details: Vehicle CANH/CANL protection at J1
- Part Type: Tvs Diode	
- Manufacturer Part Number: ESD2CAN24DBZRQ1
- Functional Group: Vehicle CAN
- Datasheet URL: https://storage\.googleapis\.com/graviton\-electric\-symbols/document\_assets/user\-uploaded/b40a13364b87f37a4a674d045008ff692912477ffbb33e4353a536bfee33429c\.pdf

**Pins:**
- 1 [pin 1]
- 2 [pin 2]
- 3 [pin 3]

### D5 — [ESD2CAN24DBZRQ1](https://flux.ai/silicon-yard/esd2can24dbzrq1.md)

- Manufacturer Name: Texas Instruments
- Role: ESD Protection
- Part Type: Tvs Diode	
- Manufacturer Part Number: ESD2CAN24DBZRQ1
- Functional Group: Keypad CAN
- Role Details: Keypad CANH/CANL protection at J1
- Datasheet URL: https://storage\.googleapis\.com/graviton\-electric\-symbols/document\_assets/user\-uploaded/b40a13364b87f37a4a674d045008ff692912477ffbb33e4353a536bfee33429c\.pdf

**Pins:**
- 1 [pin 1]
- 2 [pin 2]
- 3 [pin 3]

### D6 — [TPD2E2U06QDCKRQ1](https://flux.ai/lcsc/tpd2e2u06qdckrq1~eduy.md)

- LCSC Part Number: C915089
- JLCPCB Part Class: Extended Part
- Functional Group: USB\-C Data
- Manufacturer Part Number: TPD2E2U06QDCKRQ1
- Role Details: USB\_DP and USB\_DM protection adjacent to J2
- Role: ESD Protection
- Package or Case Code: SC\-70\-3\_L2\.0\-W1\.3\-P0\.65\-LS2\.1\-BR
- Part Type: ESD and Surge Protection \(TVS/ESD\)
- Manufacturer Name: TI\(德州仪器\)

**Pins:**
- GND [pin 3]
- IO1 [pin 1]
- IO2 [pin 2]

### F1 — [0453005\.MR](https://flux.ai/lcsc/0453005pmr~9gpo.md)

- Datasheet URL: https://storage\.googleapis\.com/graviton\-electric\-symbols/document\_assets/lcsc/2304140030\_Littelfuse\-0453005\-MR\_C178993\.pdf
- Part Type: Fuses
- JLCPCB Part Class: Extended Part
- Functional Group: Protected Automotive Input
- Role Details: 5 A fuse sized for simultaneous keypad and charge loads
- Manufacturer Part Number: 0453005\.MR
- Product Info Url: https://lcsc\.com/product\-detail/Surface\-Mount\-Fuses\_Littelfuse\_0453005\-MR\_5A\-125V\_C178993\.html
- Manufacturer Name: Littelfuse\(美国力特\)
- Package or Case Code: FUSE\-SMD\_L6\.1\-W2\.7
- LCSC Part Number: C178993
- Role: Input Protection

**Pins:**
- 1 [pin 1]
- 2 [pin 2]

### H1 — Plated GND Mounting Hole 4\.0\-2\.2mm

- Functional Group: Mechanical / Chassis Ground
- Package or Case Code: PTH 4\.00mm pad / 2\.20mm drill
- Role Details: 4\.00 mm plated GND pad, 2\.20 mm finished drill at \(\-21\.50, \-13\.50\) mm
- Mount: Chassis
- Part Type: Integrated Circuits
- Role: Mounting Hole

**Pins:**
- GND [pin 1]

### H2 — Plated GND Mounting Hole 4\.0\-2\.2mm

- Functional Group: Mechanical / Chassis Ground
- Package or Case Code: PTH 4\.00mm pad / 2\.20mm drill
- Mount: Chassis
- Part Type: Integrated Circuits
- Role: Mounting Hole
- Role Details: 4\.00 mm plated GND pad, 2\.20 mm finished drill at \(\+21\.50, \-13\.50\) mm

**Pins:**
- GND [pin 1]

### H3 — Plated GND Mounting Hole 4\.0\-2\.2mm

- Role: Mounting Hole
- Functional Group: Mechanical / Chassis Ground
- Mount: Chassis
- Part Type: Integrated Circuits
- Package or Case Code: PTH 4\.00mm pad / 2\.20mm drill
- Role Details: 4\.00 mm plated GND pad, 2\.20 mm finished drill at \(\-21\.50, \+13\.50\) mm

**Pins:**
- GND [pin 1]

### H4 — Plated GND Mounting Hole 4\.0\-2\.2mm

- Package or Case Code: PTH 4\.00mm pad / 2\.20mm drill
- Functional Group: Mechanical / Chassis Ground
- Mount: Chassis
- Role: Mounting Hole
- Part Type: Integrated Circuits
- Role Details: 4\.00 mm plated GND pad, 2\.20 mm finished drill at \(\+21\.50, \+13\.50\) mm

**Pins:**
- GND [pin 1]

### J1 — [532610871](https://flux.ai/lcsc/532610871~bzp6.md)

- Datasheet URL: https://storage\.googleapis\.com/graviton\-electric\-symbols/document\_assets/lcsc/2406281007\_MOLEX\-532610871\_C293349\.pdf
- Functional Group: Vehicle Input and External I/O
- JLCPCB Part Class: Extended Part
- Manufacturer Part Number: 532610871
- Part Type: Wire To Board / Wire To Wire Connector
- LCSC Part Number: C293349
- Package or Case Code: CONN\-SMD\_532610871
- Role Details: Vehicle VBAT, ground, vehicle CAN, keypad power and keypad CAN
- Role: External Connector
- Manufacturer Name: MOLEX
- Product Info Url: https://lcsc\.com/product\-detail/PCB\-Connectors\-Headers\-Male\-Pins\_MOLEX\-532610871\_C293349\.html

**Pins:**
- 0 [pin 0]
- 1 [pin 1]
- 2 [pin 2]
- 3 [pin 3]
- 4 [pin 4]
- 5 [pin 5]
- 6 [pin 6]
- 7 [pin 7]
- 8 [pin 8]

### J2 — [FTSH\-105\-01\-L\-DV\-K](https://flux.ai/adrian95/ftsh-105-01-l-dv-k.md)

- License: https://creativecommons\.org/licenses/by/4\.0/
- Manufacturer Name: Samtec
- Manufacturer Part Number: FTSH\-105\-01\-X\-DV\-K\-X
- Role Details: Data\-only pigtail header; no VBUS connection
- Functional Group: USB\-C Data
- Role: USB\-C Data Header
- Datasheet URL: https://suddendocs\.samtec\.com/catalog\_english/ftsh\_smt\.pdf
- Part Type: Connector

**Pins:**
- 01 [pin 01]
- 02 [pin 02]
- 03 [pin 03]
- 04 [pin 04]
- 05 [pin 05]
- 06 [pin 06]
- 07 [pin 07]
- 08 [pin 08]
- 09 [pin 09]
- 10 [pin 10]

### J3 — [X1311WVS\-04J\-C18D42R1](https://flux.ai/lcsc/x1311wvs-04j-c18d42r1~s2pe.md)

- Role Details: \+3V3, SWDIO, SWCLK, GND
- Manufacturer Name: XKB Connection\(中国星坤\)
- Role: Debug Header
- Functional Group: SWD Debug
- Manufacturer Part Number: X1311WVS\-04J\-C18D42R1
- Package or Case Code: HDR\-SMD\_4P\-P1\.27\-V\-M\-LS4\.2\-R1
- LCSC Part Number: C2881571
- JLCPCB Part Class: Extended Part
- Part Type: Pin Headers

**Pins:**
- 1 [pin 1]
- 2 [pin 2]
- 3 [pin 3]
- 4 [pin 4]

### J4 — [532610871](https://flux.ai/lcsc/532610871~bzp6.md)

- Role: Charge Output Connector
- Datasheet URL: https://storage\.googleapis\.com/graviton\-electric\-symbols/document\_assets/lcsc/2406281007\_MOLEX\-532610871\_C293349\.pdf
- Functional Group: USB\-A Charge Output
- JLCPCB Part Class: Extended Part
- Manufacturer Part Number: 532610871
- Part Type: Wire To Board / Wire To Wire Connector
- Role Details: Three parallel CHG\_5V contacts, three parallel GND contacts, two NC; requires matching 8\-position harness
- LCSC Part Number: C293349
- Current Rating: 1A
- Package or Case Code: CONN\-SMD\_532610871
- Manufacturer Name: Molex
- Product Info Url: https://lcsc\.com/product\-detail/PCB\-Connectors\-Headers\-Male\-Pins\_MOLEX\-532610871\_C293349\.html
- Connector Positions: 8

**Pins:**
- 0 [pin 0]
- 1 [pin 1]
- 2 [pin 2]
- 3 [pin 3]
- 4 [pin 4]
- 5 [pin 5]
- 6 [pin 6]
- 7 [pin 7]
- 8 [pin 8]

### U10 — [TPS259530DSGT](https://flux.ai/lcsc/tps259530dsgt~rjba.md)

- JLCPCB Part Class: Extended Part
- Role: eFuse
- Symbol Style: parametric\-v1
- Part Type: Power Management
- Manufacturer Part Number: TPS259530DSGT
- LCSC Part Number: C2866860
- Functional Group: Charge Rail eFuse
- Manufacturer Name: TI\(德州仪器\)
- License: https://creativecommons\.org/licenses/by/4\.0/
- Package or Case Code: WSON\-8\_L2\.0\-W2\.0\-P0\.50\-TL\-EP
- Role Details: 5 V input, approximately 3 A current limit, UVLO near 4\.3 V
- Datasheet URL: https://storage\.googleapis\.com/graviton\-electric\-symbols/document\_assets/user\-uploaded/2ee9d36c736b94c823f3e974f01327c9e6535cf939e312150f666823abb6232b\.pdf

**Pins:**
- \~\{FLT\} [pin 6]
- dVdt [pin 1]
- EN/UVLO [pin 2]
- EP [pin 9]
- GND [pin 8]
- ILM [pin 7]
- IN [pin 3]
- IN [pin 4]
- OUT [pin 5]

### U14 — [TMP117MAIDRVR](https://flux.ai/lcsc/tmp117maidrvr~t4kq.md)

- Part Type: Temperature Sensors
- Role Details: TMP117 on I2C1 with ADD0 grounded
- Functional Group: Temperature Sensor
- LCSC Part Number: C2803242
- Manufacturer Part Number: TMP117MAIDRVR
- Manufacturer Name: TI\(德州仪器\)
- Package or Case Code: WSON\-6\_L2\.0\-W2\.0\-P0\.65\-BL\-EP
- JLCPCB Part Class: Extended Part
- Role: Temperature Sensor

**Pins:**
- ADD0 [pin 4]
- ALERT [pin 3]
- EP [pin 7]
- GND [pin 2]
- SCL [pin 1]
- SDA [pin 6]
- V\+ [pin 5]

### U2 — [STM32G0B1CBT6](https://flux.ai/lcsc/stm32g0b1cbt6~dg8z.md)

- Manufacturer Part Number: STM32G0B1CBT3
- JLCPCB Part Class: Extended Part
- Datasheet URL: https://www\.st\.com/resource/en/datasheet/stm32g0b1cb\.pdf
- Role Details: Main MCU; HSI48 USB, dual FDCAN, I2C, ADC and SWD
- Package or Case Code: LQFP\-48\_L7\.0\-W7\.0\-P0\.50\-LS9\.0\-BL
- Operating Temperature: \-40°C \~ 85°C \(TA\)
- Symbol Style: parametric\-v1
- Frequency: 64MHz
- Role: Signal Generation
- Part Type: ST Microelectronics
- Manufacturer Name: ST\(意法半导体\)
- Functional Group: MCU Core
- LCSC Part Number: C2847904
- Voltage Supply: 1\.7 \~ 3\.6V

**Pins:**
- PA0 [pin 11]
- PA1 [pin 12]
- PA10 [pin 32]
- PA11\[PA9\] [pin 33]
- PA12\[PA10\] [pin 34]
- PA13 [pin 35]
- PA14\-BOOT0 [pin 36]
- PA15 [pin 37]
- PA2 [pin 13]
- PA3 [pin 14]
- PA4 [pin 15]
- PA5 [pin 16]
- PA6 [pin 17]
- PA7 [pin 18]
- PA8 [pin 28]
- PA9 [pin 29]
- PB0 [pin 19]
- PB1 [pin 20]
- PB10 [pin 22]
- PB11 [pin 23]
- PB12 [pin 24]
- PB13 [pin 25]
- PB14 [pin 26]
- PB15 [pin 27]
- PB2 [pin 21]
- PB3 [pin 42]
- PB4 [pin 43]
- PB5 [pin 44]
- PB6 [pin 45]
- PB7 [pin 46]
- PB8 [pin 47]
- PB9 [pin 48]
- PC13 [pin 1]
- PC14\-OSC32\_IN [pin 2]
- PC15\-OSC32\_OUT [pin 3]
- PC6 [pin 30]
- PC7 [pin 31]
- PD0 [pin 38]
- PD1 [pin 39]
- PD2 [pin 40]
- PD3 [pin 41]
- PF0\-OSC\_IN [pin 8]
- PF1\-OSC\_OUT [pin 9]
- PF2\-NRST [pin 10]
- VBAT [pin 4]
- VDD/VDDA [pin 6]
- VREF\+ [pin 5]
- VSS/VSSA [pin 7]

### U4 — [LM65645SRZTRQ1](https://flux.ai/silicon-yard/lm65645srztrq1.md)

- Manufacturer Part Number: LM65645SRZTRQ1
- Manufacturer Name: Texas Instruments
- Symbol Style: parametric\-v1
- License: https://creativecommons\.org/licenses/by/4\.0/
- Role: Power Conversion
- Max Current: 4\.5A
- Datasheet URL: https://storage\.googleapis\.com/graviton\-electric\-symbols/document\_assets/user\-uploaded/66a5596410ea65e697b50148afbb994976ab01079629c675a073b9d02c373bf6\.pdf
- Role Details: LM65645SRZTRQ1 fixed 5 V, 2\.2 MHz AUTO; 4\.5 A rated vs 3\.5 A design peak \(28\.6% margin\); 3\-65 V operating input, 70 V transient, 0\.7 mm WQFN
- Part Type: Power Management
- Package or Case Code:  20\-WFQFN Exposed Pad
- Functional Group: 5 V Buck
- Current: 3\.5A

**Pins:**
- BIAS [pin 20]
- BOOT [pin 15]
- DAP [pin 21]
- EN\_UVLO [pin 7]
- FB [pin 3]
- MODE\_SYNC [pin 5]
- NC [pin 18]
- NC [pin 10]
- NC [pin 12]
- NC [pin 16]
- NC1 [pin 1]
- NC2 [pin 8]
- PG [pin 2]
- PGND1 [pin 9]
- PGND2 [pin 19]
- RT [pin 6]
- SW1 [pin 13]
- SW2 [pin 14]
- VCC [pin 4]
- VIN1 [pin 11]
- VIN2 [pin 17]

### U5 — [TPS1H200A\-Q1](https://flux.ai/adrian95/tps1h200a-q1~o2z.md)

- Package or Case Code: SOP65P490X110\-9N
- Datasheet URL: https://www\.ti\.com/lit/gpn/tps1h200a\-q1
- Role: Switching
- Role Details: VBAT\_PROT to KP\_PWR; 2 A hardware current limit, latch\-off delay, 3\.3 V logic\-compatible control
- Manufacturer Part Number: TPS1H200AQDGNRQ1
- Manufacturer Name: Texas Instruments
- Integrated Circuit Type: Power Management
- Functional Group: Keypad Power
- License: https://creativecommons\.org/licenses/by/4\.0/
- Part Type: Integrated Circuit

**Pins:**
- \~FAULT [pin 3]
- CL [pin 4]
- DELAY [pin 5]
- DIAG\_EN [pin 2]
- EP [pin 9]
- GND [pin 6]
- IN [pin 1]
- OUT [pin 7]
- VS [pin 8]

### U6 — [TCAN1042DRBRQ1](https://flux.ai/lcsc/tcan1042drbrq1~q4bt.md)

- Manufacturer Part Number: TCAN3404DRBRQ1
- LCSC Part Number: C2671508
- Manufacturer Name: TI\(德州仪器\)
- Datasheet URL: https://www\.ti\.com/lit/ds/symlink/tcan3404\-q1\.pdf
- JLCPCB Part Class: Extended Part
- Package or Case Code: VSON\-8\_L3\.0\-W3\.0\-P0\.65\-LS3\.5\-TL
- Role: Logic\-level Shifting
- Functional Group: Vehicle CAN
- Role Details: Vehicle 3\.3 V CAN transceiver

**Pins:**
- CANH [pin 7]
- CANL [pin 6]
- EP [pin 9]
- GND [pin 2]
- NC [pin 5]
- RXD [pin 4]
- STB [pin 8]
- TXD [pin 1]
- VCC [pin 3]

### U7 — [TCAN1042DRBRQ1](https://flux.ai/lcsc/tcan1042drbrq1~q4bt.md)

- Manufacturer Part Number: TCAN3404DRBRQ1
- LCSC Part Number: C2671508
- Manufacturer Name: TI\(德州仪器\)
- Datasheet URL: https://www\.ti\.com/lit/ds/symlink/tcan3404\-q1\.pdf
- Role Details: Keypad 3\.3 V CAN transceiver
- Role: Logic\-level Shifting
- JLCPCB Part Class: Extended Part
- Package or Case Code: VSON\-8\_L3\.0\-W3\.0\-P0\.65\-LS3\.5\-TL
- Functional Group: Keypad CAN

**Pins:**
- CANH [pin 7]
- CANL [pin 6]
- EP [pin 9]
- GND [pin 2]
- NC [pin 5]
- RXD [pin 4]
- STB [pin 8]
- TXD [pin 1]
- VCC [pin 3]

### U8 — [SN74LVC1G126DBVR](https://flux.ai/adrian95/sn74lvc1g126dbvr~knl.md)

- Manufacturer Name: Texas Instruments
- Role Details: Active\-high vehicle CAN TX physical gate
- Role: Isolation
- Part Type: Integrated Circuit
- Functional Group: Vehicle CAN
- Datasheet URL: https://www\.ti\.com/lit/ds/symlink/sn74lvc1g126\-q1\.pdf
- Manufacturer Part Number: SN74LVC1G126QDBVRQ1
- License: https://creativecommons\.org/licenses/by/4\.0/

**Pins:**
- A [pin 2]
- GND [pin 3]
- OE [pin 1]
- VCC [pin 5]
- Y [pin 4]

### U9 — [TLV76633QWDRBRQ1](https://flux.ai/lcsc/tlv76633qwdrbrq1~qjs4.md)

- JLCPCB Part Class: Extended Part
- Package or Case Code: WSON\-8\_L3\.0\-W3\.0\-P0\.65\-TL\-EP
- Role: Power Conversion
- Datasheet URL: https://www\.ti\.com/lit/ds/symlink/tlv767\-q1\.pdf
- Functional Group: 3\.3 V LDO
- Manufacturer Name: TI\(德州仪器\)
- LCSC Part Number: C2866477
- Manufacturer Part Number: TLV76733QWDRBRQ1
- Role Details: Automotive fixed 3\.3 V 1 A LDO

**Pins:**
- EN [pin 5]
- EP [pin 9]
- GND [pin 4]
- GND [pin 6]
- IN [pin 8]
- NC [pin 2]
- NC [pin 7]
- OUT [pin 1]
- SNS [pin 3]

*The full schematic, PCB layout, bill of materials, and interactive design are available at [https://flux\.ai/jaredbeyer/rallycomm\-io\-box\-rev\-a\~li](https://flux.ai/jaredbeyer/rallycomm-io-box-rev-a~li).*

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*Generated from [https://flux\.ai/jaredbeyer/rallycomm\-io\-box\-rev\-a\~li](https://flux.ai/jaredbeyer/rallycomm-io-box-rev-a~li)*