6 layers105.6 × 86.1 mm
2 layers299.3 × 93.1 mm
HAT CM4 base
ConnectBox/Circuit-DesignConnectbox Circuit Design
- Size
- 299.3 × 93.1 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 178
- Nets
- 133
- Pads
- 902
- Tracks, vias
- 0, 0
- Routed
- Not yet
- KiCad
- KiCad 5 (file 20210722)
- Created
- 31 Jul 2018
- Updated
- 9 Mar 2025
Overview
HAT CM4 base is an open-source printed circuit board by ConnectBox, from the ConnectBox/Circuit-Design repository on GitHub. It is a 2-layer board of 299.3 × 93.1 mm with 178 parts on 133 nets.
It is built around the ATTINY88-AU, MAX1709ESE+T and RT9742ANGJ5F, with the AP22814AW5, AT24CS01-SSHM-B and AXP209 among its other parts. Its parts include 60 resistors, 40 capacitors, 18 transistors, 17 diodes and 14 ICs. It belongs with the computers and single-board computers boards and the AVR (ATmega, ATtiny) and Raspberry Pi (Linux) boards of this library.
Main components
9
ATTINY88-AU
TQFP-32(7x7)-40℃~+85℃ 1.8V~5.5V 10bit 12MHz 28 512Byte 64Byte 8 Bit 8KB AVR Built-in FLASH TQFP-32(7x7) Microcontrollers (MCU/MPU/SOC) ROHSMicrochip TechnologyMicrocontrollers (MCU/MPU/SOC)
MAX1709ESE+T
SOP-16-40℃~+85℃@(TA) 1 1MHz 2.5V~5.5V 7.5A 700mV~5V Adjustable Boost Boost Built-in No SOP-16 DC-DC Converters ROHSMaxim Integrated (Analog Devices)DC-DC Converters
RT9742ANGJ5F
TSOT-23-5-40℃~+85℃ 1 2.7V~6V 3A 55mΩ Active High High Side Switch 输出放电功能、软启动、欠压锁定、反向电压保护、Overcurrent Protection、Over temperature protection、Short-Circuit Protection、反向电流阻断 TSOT-23-5 Power Distribution Switches ROHSRichtek TechPower Distribution SwitchesAP22814AW5
SOT-25-40℃~+85℃ 1 2.7V~5.5V 3A 50mΩ Active High、Active Low High Side Switch Output discharge function、Soft-start、Under-voltage lockout、Reverse voltage protection、Overcurrent Protection、Over temperature protection、Short-Circuit Protection、Reverse current blocking SOT-25 Power Distribution Switches ROHSDiodes IncorporatedPower Distribution Switches
AT24CS01-SSHM-B
SOIC-8-40℃~+85℃ 1.7V~5.5V 1Kbit 1MHz 5ms I2C SOIC-8 EEPROM ROHSMicrochip TechnologyEEPROMAXP209
QFN-48-EP(6x6)Overcurrent Protection、Operating status indication、Adjustable current limiting、Power-on timing control QFN-48-EP(6x6) Power Management - Specialized ROHSX-Powers TechBattery Management
FSUSB42MUX
MSOP-10-40℃~+85℃ 12ns 13ns 2 250ps 2:1 3.7pF 3.9Ω 3V~4.4V 720MHz MSOP-10 Analog Switches, Multiplexers ROHSonsemiAnalog Switches, Multiplexers
USB2514B-I/M2
SQFN-36-EP(6x6)-40℃~+85℃ 3.3V 4 Hub I2C USB 2.0 SQFN-36-EP(6x6) USB HUB Controllers ROHSMicrochip TechnologyUSB HUB Controllers
MMBD914
SOT-231.25V@150mA 100V 1uA@75V 300mA 350mW 4ns 500mA Independent SOT-23 Switching Diodes ROHSJiangsu Changjing Electronics Technology (CJ)Switching Diodes
README
README.mdCircuit-Design
Connectbox Circuit Design
This repo contains the schematic and KiCAD design files for the NEO-USB-HAT. This is a daugherboard to add an extra USB port and power input to a NanoPi NEO.
Parts
178| Qty | Value | Footprint | References |
|---|---|---|---|
| 13 | 10K | Resistor_SMD:R_0603_1608Metric | R1, R6, R9, R13, R16, R20, R23, R27, R30, R35, R42, R46, R47 |
| 13 | 10uF | Capacitor_SMD:C_0603_1608Metric | C1, C2, C3, C4, C19, C20, C25, C26, C27, C32, C34, C36, C38 |
| 12 | 3J15 | Package_TO_SOT_SMD:SOT-323_SC-70 | Q2, Q3, Q4, Q6, Q7, Q8, Q10, Q11, Q12, Q14, Q15, Q16 |
| 9 | 0.1uf | Capacitor_SMD:C_0603_1608Metric | C15, C21, C22, C28, C29, C31, C33, C35, C37 |
| 9 | 510 | Resistor_SMD:R_0603_1608Metric | R8, R12, R15, R19, R22, R26, R29, R31, R48 |
| 8 | 100K | Resistor_SMD:R_0603_1608Metric | R5, R10, R14, R17, R21, R24, R28, R32 |
| 6 | 20K | Resistor_SMD:R_0603_1608Metric | R3, R4, R11, R18, R25, R33 |
| 5 | 2.2K | Resistor_SMD:R_0603_1608Metric | R2, R43, R44, R54, R55 |
| 5 | Red | LED_SMD:LED_0603_1608Metric | LED2, LED4, LED6, LED8, LED9 |
| 4 | 150uf | Capacitor_SMD:CP_Elec_5x3 | C11, C12, C16, C17 |
| 4 | 36.0K | Resistor_SMD:R_0603_1608Metric | R56, R57, R58, R60 |
| 4 | 8205A | Package_SO:TSSOP-8_4.4x3mm_P0.65mm | Q5, Q9, Q13, Q17 |
| 4 | Battery Connector | CustomComponents:Battery 18650-3 | BT1, BT2, BT3, BT4 |
| 4 | Blue | LED_SMD:LED_0603_1608Metric | LED1, LED3, LED5, LED7 |
| 4 | MMBD914 | Diode_SMD:D_SOT-23_ANK | D1, D2, D3, D5 |
| 4 | MountingHole | MountingHole:MountingHole_3.2mm_M3 | H1, H2, H3, H4 |
| 3 | 12K | Resistor_SMD:R_0603_1608Metric | R49, R52, R59 |
| 3 | 1K | Resistor_SMD:R_0603_1608Metric | R41, R45, R51 |
| 3 | 1uF | Capacitor_SMD:C_0603_1608Metric | C8, C9, C18 |
| 3 | 22uF | Capacitor_SMD:C_0603_1608Metric | C10, C39, C40 |
| 3 | 4.7uF | Capacitor_SMD:C_0603_1608Metric | C5, C6, C7 |
| 3 | RT9742ANGJ5F | Package_TO_SOT_SMD:SOT-23-5 | U8, U9, U12 |
| 3 | TPD4EUSB30 | CustomComponents:USON-10_2.5x1.0mm_P0.5mm | U6, U7, U10 |
| 2 | 51K | Resistor_SMD:R_0603_1608Metric | R50, R53 |
| 2 | 9pF | Capacitor_SMD:C_0603_1608Metric | C23, C24 |
| 2 | SPST-PUSH | CustomComponents:SW-TL3330A | PB1, PB2 |
| 2 | USB_A | CustomComponents:USB_A_CUI_smd | J3, J5 |
| 1 | 0.03 ohm | Resistor_SMD:R_0603_1608Metric | R34 |
| 1 | 0.22uf | Capacitor_SMD:C_0603_1608Metric | C14 |
| 1 | 1.0 uH | Inductor_SMD:L_Taiyo-Yuden_MD-5050 | L2 |
| 1 | 1.0uf | Capacitor_SMD:C_0603_1608Metric | C13 |
| 1 | 1.5 uH | Inductor_SMD:L_Taiyo-Yuden_NR-50xx | L3 |
| 1 | 1.8K | Resistor_SMD:R_0603_1608Metric | R38 |
| 1 | 100 | Resistor_SMD:R_0603_1608Metric | R36 |
| 1 | 100uF | Capacitor_SMD:CP_Elec_6.3x4.5 | C30 |
| 1 | 2.0 | Resistor_SMD:R_0603_1608Metric | R40 |
| 1 | 200K | Resistor_SMD:R_0603_1608Metric | R37 |
| 1 | 220K | Resistor_SMD:R_0603_1608Metric | R39 |
| 1 | 24MHz | Crystal:Crystal_SMD_HC49-SD | Y1 |
| 1 | 2N7002 | Package_TO_SOT_SMD:SOT-23 | Q18 |
| 1 | 36K | Resistor_SMD:R_0603_1608Metric | R7 |
| 1 | 4.7 uH | CustomComponents:INDUCTOR_SMD_6x6-1 | L1 |
| 1 | 5V | TestPoint:TestPoint_THTPad_D1.5mm_Drill0.7mm | TP6 |
| 1 | 690-019-298-412 | CustomComponents:HDMI_CnC_SMT | J2 |
| 1 | AC_IN | TestPoint:TestPoint_THTPad_D1.5mm_Drill0.7mm | TP1 |
| 1 | AP22814A | CustomComponents:U-DFN2020-6 | U3 |
| 1 | AT24CS01-SSHM | Package_SO:SOIC-8_3.9x4.9mm_P1.27mm | U5 |
| 1 | ATtiny88-AU | Package_QFP:TQFP-32_7x7mm_P0.8mm | U1 |
| 1 | AXP209 | CustomComponents:UQFN-48-1EP_6x6mm_Pitch0.4mm_75 | U2 |
| 1 | Amber | LED_SMD:LED_0603_1608Metric | LED12 |
| 1 | Bat+ | TestPoint:TestPoint_THTPad_D1.5mm_Drill0.7mm | TP3 |
| 1 | ComputeModule4 | CM4IO:Raspberry-Pi-4-Compute-Module | Module1 |
| 1 | Conn_01x04 | CustomComponents:HFW4R | J4 |
| 1 | Conn_01x04 | Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Vertical | P1 |
| 1 | FSUSB42MUX | Package_SO:MSOP-10_3x3mm_P0.5mm | U11 |
| 1 | Green | LED_SMD:LED_0603_1608Metric | LED10 |
| 1 | HC-R8812AF1 | CustomComponents:HC-R8812AU2 | U14 |
| 1 | IPS | TestPoint:TestPoint_THTPad_D1.5mm_Drill0.7mm | TP4 |
| 1 | IPS_Sw | TestPoint:TestPoint_THTPad_D1.5mm_Drill0.7mm | TP5 |
| 1 | LED Green | LED_SMD:LED_0603_1608Metric | LED11 |
| 1 | MAX1709ESE | Package_SO:SOP-16_3.9x9.9mm_P1.27mm | U4 |
| 1 | Micro_SD_Card | CM4IO:SDCARD_MOLEX_503398-1892 | J1 |
| 1 | NRVTS260ESFT1G | CustomComponents:SOD-123FL | D4 |
| 1 | NX6008 | Package_TO_SOT_SMD:SOT-23 | Q1 |
| 1 | Pwr_Gnd | TestPoint:TestPoint_THTPad_D1.5mm_Drill0.7mm | TP2 |
| 1 | SolderJumper_2_Open | Jumper:SolderJumper-2_P1.3mm_Open_TrianglePad1.0x1.5mm | JP1 |
| 1 | USB-C | CustomComponents:USB-C-GCT | J6 |
| 1 | USB2514B-I/M2 | Package_DFN_QFN:QFN-36-1EP_6x6mm_P0.5mm_EP3.7x3.7mm | U13 |
More from ConnectBox/Circuit-Design
12- 6 layers105.6 × 86.1 mm
- 4 layers105 × 78 mm
- 2 layers56.6 × 71.6 mm
- 2 layers57.4 × 71.6 mm
- 2 layers66 × 81.6 mm
- 4 layers53.7 × 87 mm
- 4 layers41.6 × 79.2 mm
- 2 layers52.3 × 80.4 mm
- 2 layers57.6 × 88.2 mm
- 2 layers52 × 23.2 mm
- 2 layers52 × 23.4 mm
Similar boards
- 2 layers76 × 28 mm
- 4 layers110 × 100 mm
- 4 layers40 × 55 mm
CM4 Carrier
xwlred/OpenHD-CM4-Carrier-Board
[Shelved] RPI CM4 carrier for use in OpenHD
73 parts14LGPL-2.1 - 2 layers213.7 × 137.6 mm
- 4 layers160 × 90 mm
- 4 layers100 × 100 mm
UMMTJ Mainboard
vamatis/UMMTJ
A universal Test jig setup for small production and prototype shops
147 parts - 8 layers75 × 79 mm
- 2 layers58 × 78 mm
CM4 1
YC-Lam/simple_CM4_cluster
Raspbberry Pi compute module 4 cluster in a 120x120x60mm form-factor. each pi can work alone as a 78x58mm SBC
72 parts11GPL-3.0
Questions
How big is the HAT CM4 base PCB?
It measures 299.3 × 93.1 mm and has 2 copper layers, 1.6 mm thick.
What parts does the HAT CM4 base use?
178 parts, built around the ATTINY88-AU, MAX1709ESE+T, RT9742ANGJ5F and AP22814AW5. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the HAT CM4 base KiCad files?
From the ConnectBox/Circuit-Design repository on GitHub, at the commit this page was made from: the board is Hat 2.0/HAT_CM4_183_041022-V2.1/Base/HAT_CM4 base.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the HAT CM4 base design in my own project?
Its repository states no licence, so its author keeps all rights: ask ConnectBox before reusing the design.