2 layers86.1 × 128.5 mm
2 layers140 × 128.5 mm
Expander gate output
doctea/usb_midi_clocker_hardware- Size
- 140 × 128.5 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 116
- Nets
- 112
- Pads
- 389
- Tracks, vias
- 595, 57
- Pours
- 4
- Routed
- Yes
- KiCad
- KiCad 8.0 (file 20240108)
- Created
- 22 Jun 2023
- Updated
- 4 Jan 2025
Overview
Expander gate output is an open-source printed circuit board by doctea, from the doctea/usb_midi_clocker_hardware repository on GitHub. It is a 2-layer board of 140 × 128.5 mm with 116 parts on 112 nets, routed with 595 tracks and 57 vias.
It is built around the TXS0108EPW and BAT43. Its parts include 48 diodes, 32 resistors, 10 connectors, 5 capacitors and 3 ICs.
Main components
2
TXS0108EPW
TSSOP-20-40℃~+85℃ 1 1.4V~3.6V 1.65V~5.5V 60Mbps 8 Automatic direction detection、Output enable high-impedance、Integrated pull-up resistor Bidirectional Level translator Push-Pull、Open-drain TSSOP-20 Translators, Level Shifters ROHSTexas InstrumentsTranslators, Level Shifters
BAT43
DO-204AH-65℃~+125℃ 1 Independent 1V@0.2A 200mA 30V 4A 500nA@25V DO-204AH Schottky Diodes ROHSSTMicroelectronicsSchottky Diodes
README
expander_usb_sd/README.md#TODO
- DONE check measurements of the USB C screw-holes
- DONE check measurements of cutout for the SD card holder
- DONEish arrange silkscreen text so purpose of each connector is properly usable
Parts
116| Qty | Value | Footprint | References |
|---|---|---|---|
| 32 | BAT43 | Diode_SMD:D_SOD-123 | D1, D2, D3, D10, D11, D12, D13, D14, D15, D16, D25, D26, D27, D28, D29, D30 +16 |
| 16 | 1K | Resistor_SMD:R_0805_2012Metric | R2, R4, R6, R8, R10, R12, R14, R16, R18, R20, R22, R24, R26, R28, R30, R32 |
| 16 | 47K | Resistor_SMD:R_0805_2012Metric | R1, R3, R5, R7, R9, R11, R13, R15, R17, R19, R21, R23, R25, R27, R29, R31 |
| 16 | LED | LED_THT:LED_D3.0mm | D17, D18, D19, D20, D21, D22, D23, D24, D41, D42, D43, D44, D45, D46, D47, D48 |
| 14 | fuzzySI_thonkiconn | doctea:Thonkiconn Renumbered | JACK2, JACK3, JACK4, JACK5, JACK6, JACK7, JACK8, JACK9, JACK10, JACK11, JACK12, JACK13, JACK15, JACK16 |
| 5 | C_Small | Capacitor_SMD:C_0805_2012Metric | C1, C2, C5, C6, C7 |
| 2 | 16 pin header | Connector_PinHeader_2.54mm:PinHeader_2x08_P2.54mm_Vertical | EXPANDER_THRU, GATE_SPI_OUTPUT_EXPANDER1 |
| 2 | TXS0108EPW | Package_SO:TSSOP-20_4.4x6.5mm_P0.65mm | U1, U2 |
| 2 | ~ | doctea:Thonkiconn Renumbered | JACK1, JACK14 |
| 1 | 5V selector | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical | J7 |
| 1 | ADDR0 | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical | J16 |
| 1 | ADDR1 | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical | J17 |
| 1 | ADDR2 | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical | J18 |
| 1 | CS_SELECT | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical | J6 |
| 1 | Eurorack power | Connector_IDC:IDC-Header_2x08_P2.54mm_Vertical | J5 |
| 1 | MCP23S17_SS | Package_SO:SSOP-28_5.3x10.2mm_P0.65mm | U3 |
| 1 | Output_A_Connector_Backboard | Connector_PinSocket_2.54mm:PinSocket_1x10_P2.54mm_Vertical | J1 |
| 1 | Output_A_Connector_Frontboard | Connector_PinHeader_2.54mm:PinHeader_1x10_P2.54mm_Vertical | J3 |
| 1 | Output_B_Connector_Backboard | Connector_PinSocket_2.54mm:PinSocket_1x10_P2.54mm_Vertical | J2 |
| 1 | Output_B_Connector_Frontboard | Connector_PinHeader_2.54mm:PinHeader_1x10_P2.54mm_Vertical | J4 |
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Questions
How big is the Expander gate output PCB?
It measures 140 × 128.5 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Expander gate output use?
116 parts, built around the TXS0108EPW and BAT43. 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 Expander gate output KiCad files?
From the doctea/usb_midi_clocker_hardware repository on GitHub, at the commit this page was made from: the board is expander_gate_output/expander_gate_output.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the Expander gate output design in my own project?
Its repository states no licence, so its author keeps all rights: ask doctea before reusing the design.