MixSig
About the MixSig PCB
MixSig is an open source STM32 PCB design by a-s-adam, published on GitHub. It is a 4-layer board measuring 59.9 × 73.3 mm, with 110 components from 39 distinct parts.
Its main chip is the STM32F103CBT6, from the STM32 family. Other key parts include the TLV62569DBVT, HT7533-1, MCP6001T-E/OT, USBLC6-2SC6 and REF3033AIDBZT. By type, the board carries 45 capacitors, 36 resistors, 11 ICs, 9 diodes, 4 connectors and 4 inductors.
From the project
Repository for PCB designs
Working with JDM product development structures, it's hard to get full exposure on an entire electrical PCB design from start to finish. The goal of this repository is to display design, component selection, schematic capture, layout, ordering, and bring-up without sharing designs done during my 9-5 job.
dev_board - Working to redefine scope of this board; originally it was ATMEGA which is less common in production boards, so I'm exploring ESP32 based system to make an IoT mesh network. - [Work in Progress]
Main components on the MixSig
MixSig bill of materials (BOM)
110 components, 39 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | TLV62569DBVT TLV62569DBV TEXAS INSTRUMENTS | SOT-23-5 | U100 |
| 1 | HT7533-1 HOLTEK | SOT-89-3 | U101 |
| 4 | MCP6001T-E/OT MICROCHIP | SOT-23-5 | U102, U302, U303, U401 |
| 1 | STM32F103CBT6 STMicroelectronics | LQFP-48_7x7mm_P0.5mm | U200 |
| 1 | USBLC6-2SC6 STMicroelectronics | SOT-23-6 | U201 |
| 1 | REF3033AIDBZT TEXAS INSTRUMENTS | SOT-23 | U300 |
| 1 | ADC141S626CIMM/NOPB ADC141S626CIMM_NOPB TEXAS INSTRUMENTS | VSSOP-10 | U301 |
| 1 | DAC7563SDGSR TEXAS INSTRUMENTS | VSSOP-10 | U400 |
| 1 | TSX-3225 16.0000MF09Z-AC3 16MHz Epson Timing | Crystal_SMD_3225-4Pin_3.2x2.5mm | Y200 |
| 1 | 3220-10-0100-00 2x5 1.27mm CNC TECH | PinHeader_2x05_P1.27mm_Vertical_SMD | J200 |
| 1 | TYPE-C-31-M-12 USB_C_Receptacle_USB2.0 Korean Hroparts Elec | USB_C_Receptacle_HRO_TYPE-C-31-M-12 | J201 |
| 2 | 31-5640-1010 031-5640-1010 AMPHENOL RF | AMPHENOL-BNC-031-5640-1010 | J300, J400 |
| 1 | APT1608ZGC-AMT GREEN KINGBRIGHT | LED_0603_1608Metric | D100 |
| 1 | OVSARGB4R8 ASMB-MTB1-0A3A2 TT ELECTRONICS/OPTEK TECHNOLOGY | LED_Avago_PLCC4_3.2x2.8mm_CW | D200 |
| 7 | PESD3V3L1BA,115 NEXPERIA USA INC. | D_SOD-323 | D201, D202, D203, D204, D205, D300, D400 |
| 2 | BLM15BX601SZ1D 10n MURATA ELECTRONICS | L_0402_1005Metric | L100, L200 |
| 1 | MWSA0603S-100MT 68u SHENZHEN SUNLORD ELECTRONICS CO., LTD. | MWSA0603S | L101 |
| 1 | CMF3216F-900-2P-T HYHONGYEX | CMC-1206 | L201 |
| 5 | CC0603KRX5R6BB105 1u YAGEO | C_0603_1608Metric | C100, C101, C209, C211, C402 |
| 5 | GRM21BZ71A226ME15L 22u MURATA ELECTRONICS | C_0805_2012Metric | C102, C103, C104, C105, C107 |
Show 19 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | DNP | C_0402_1005Metric | C106 |
| 16 | LMK105B7104KVHF 100n TAIYO YUDEN | C_0402_1005Metric | C108, C202, C203, C204, C206, C207, C210, C212 +8 |
| 7 | MLASL168BB5106MTNB33 10u TAIYO YUDEN | C_0603_1608Metric | C200, C300, C301, C304, C305, C311, C400 |
| 2 | KAM05ACG1H100JH 10p KYOCERA AVX | C_0402_1005Metric | C201, C205 |
| 1 | GRM022C81C103ME01L 10n MURATA ELECTRONICS | C_0402_1005Metric | C208 |
| 4 | C0402C151J1GACAUTO 150p KEMET | C_0402_1005Metric | C302, C313, C315, C405 |
| 4 | 04025C102KAZ2A 1n KYOCERA AVX | C_0402_1005Metric | C310, C312, C403, C404 |
| 1 | 0805W8F100JT5E 10R UNI-ROYAL(Uniroyal Elec) | R_0805_2012Metric | R100 |
| 1 | 0402WGJ0104TCE 100k UNI-ROYAL(Uniroyal Elec) | R_0402_1005Metric | R101 |
| 3 | 0402WGJ0223TCE 22k UNI-ROYAL(Uniroyal Elec) | R_0402_1005Metric | R102, R306, R403 |
| 9 | 0402WGF1001TCE 1k UNI-ROYAL(Uniroyal Elec) | R_0402_1005Metric | R103, R104, R105, R200, R201, R202, R301, R308 +1 |
| 4 | 0402WGF1002TCE 10k UNI-ROYAL(Uniroyal Elec) | R_0402_1005Metric | R203, R204, R206, R401 |
| 3 | 0402WGF0000TCE 0R UNI-ROYAL(Uniroyal Elec) | R_0402_1005Metric | R205, R305, R400 |
| 6 | 0402WGF499JTCE 49R9 UNI-ROYAL(Uniroyal Elec) | R_0402_1005Metric | R207, R208, R209, R210, R300, R405 |
| 1 | 0402WGF1501TCE 1k5 UNI-ROYAL(Uniroyal Elec) | R_0402_1005Metric | R211 |
| 2 | 0402WGF5101TCE 5k1 UNI-ROYAL(Uniroyal Elec) | R_0402_1005Metric | R212, R213 |
| 2 | RC0402FR-072M2L 2M2 YAGEO | R_0402_1005Metric | R302, R303 |
| 2 | 0402WGF6801TCE 6k8 UNI-ROYAL(Uniroyal Elec) | R_0402_1005Metric | R304, R402 |
| 2 | 0402WGJ0123TCE 12k UNI-ROYAL(Uniroyal Elec) | R_0402_1005Metric | R307, R404 |
MixSig design files
The KiCad project lives in the a-s-adam/pcb_work repository on GitHub; these links point at the commit this page was built from.
MixSig: common questions
What microcontroller does the MixSig use?
The MixSig is built around the STM32F103CBT6, from the STM32 family.
How big is the MixSig PCB?
The MixSig measures 59.9 × 73.3 mm, has 4 copper layers and is 1.591 mm thick.
How many components are on the MixSig?
110 components, from 39 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.
Where can I download the MixSig design files?
From the a-s-adam/pcb_work repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.
Can I use the MixSig design in my own project?
The repository has no license, so all rights stay with a-s-adam. Use it as a reference, and ask the author before reusing the design.
Can I test firmware for the MixSig without the hardware?
Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug STM32 firmware against it before you order a PCB.
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