2 layers14.2 × 25 mm
Usd adapter
tmarkettos/sd-mux
SD card multiplexer, for automated embedded development
2 parts7Apache-2.0
2 layers50 × 132 mm
Sd mux
tmarkettos/sd-mux7SD card multiplexer, for automated embedded development
- Size
- 50 × 132 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 55
- Nets
- 74
- Pads
- 274
- Tracks, vias
- 827, 77
- Pours
- 6
- Routed
- Yes
- KiCad
- KiCad 4
- Created
- 29 Aug 2017
- Updated
- 17 May 2018
Overview
Sd mux is an open-source printed circuit board by tmarkettos, from the tmarkettos/sd-mux repository on GitHub, published under the Apache-2.0 licence. It is a 2-layer board of 50 × 132 mm with 55 parts on 74 nets, routed with 827 tracks and 77 vias.
It is built around the 74AHC1G14GV, TS3A27518EPW and TS3USB30EDGSR-TP, with the ES1AL and MI0805K400R-10 among its other parts. Its parts include 11 resistors, 10 connectors, 9 capacitors, 8 transistors and 5 ICs.
Main components
5
74AHC1G14GV
SOT-23-5-40℃~+125℃ 1 1 1.2V~2.2V、1.75V~3.15V、2.15V~3.85V 16.3ns@3.3V,15pF 2V~5.5V 40uA 74AHC 8mA 8mA 900mV~1.9V、1.35V~2.75V、1.65V~3.35V SOT-23-5 Logic Gates ROHSTECH PUBLICLogic Gates
TS3A27518EPW
TSSOP-241.65V~3.6V 6 6.2Ω TSSOP-24 Analog Switches, Multiplexers ROHSTexas InstrumentsAnalog Switches, Multiplexers
TS3USB30EDGSR-TP
MSOP-10L-40℃~+85℃ 1.1GHz 1.2us 11Ω 2.5V~5.5V 200ps 20us 4pF MSOP-10L Analog Switches, Multiplexers ROHSTECH PUBLICAnalog Switches, Multiplexers
ES1AL
SOD-123FLFast Recovery / High Efficiency DiodesJiangsu Changjing Electronics Technology (CJ)
MI0805K400R-10
0805-40℃~+125℃ 1 1.5A 40Ω@100MHz 50mΩ 0805 Ferrite Beads ROHSLairdFerrite Beads
README
READMEsd-mux stands for Secure Digital Multiplexer.
This is SD card switcher (multiplexer) designed to help automatic testing.
This project is sd-mux controller - binary for controlling sd-mux device.
Requirements:
- libftdi1 1.2 - development library
- popt - development library
- cmake - binary tool
Build:
- enter into project directory
- create 'build' directory
- enter into "build" directory
- run 'cmake ..'
- run 'make'
Install:
- enter into 'build' directory
- run 'sudo make install' to install binary into '/usr/local/bin' (the default one) directory
Note: If you want to install files into different directory then add argument to cmake command: cmake -DCMAKE_INSTALL_PREFIX=/usr .. Then again run: make make install
Upstream
This is a fork of the git repo from https://git.tizen.org/cgit/tools/testlab/sd-mux/ which is described here: https://wiki.tizen.org/SD_MUX
Modifications
This version has hardware modified by A. Theodore Markettos to:
- Replace the Micro SD socket with a full-size SD card socket, since we need to use a specific SD card with our FPGA. The downstream adapter boards are still Micro SD format, since we can use adaptors to turn Micro SD into SD when needed.
- Refactor some of the components displaced by the SD card socket.
- Rework the relay section so it provides better isolation for mains power, in particular segregating potentially high and low voltage signals. The pin headers have been removed, and wiring rearranged so that 'live' and 'neutral' are not on adjacent pins on the connectors.
- Add fiducials for automated pick and place
- Replace the 8 way headers to the MicroSD adapters with 10 ways, using more common ribbon cables. Rotate so right-angle connectors can be used.
- Add spare GPIOs on a header, to match relay boards (eg ebay '4 Channel 5V Relay Module Arduino' with header with GND, 4x GPIOs, 5V)
- Current target is DirtyPCBs.com 2-layer process: 0.8mm ENIG for the usd-adaptor, 1.6mm for the main board.
The software interface is unchanged.
Parts
55| Qty | Value | Footprint | References |
|---|---|---|---|
| 7 | 10K | Resistors_SMD:R_0805_HandSoldering | R5, R6, R7, R8, R9, R10, R11 |
| 6 | IRF7606PBF | footprints:msoic-8 | Q1, Q2, Q3, Q4, Q7, Q8 |
| 4 | 100n | Capacitors_SMD:C_0805_HandSoldering | C3, C6, C7, C8 |
| 4 | 27p | Capacitors_SMD:C_0805_HandSoldering | C1, C2, C4, C5 |
| 4 | 4.7K | Resistors_SMD:R_0805_HandSoldering | R1, R2, R3, R4 |
| 4 | Fiducial | Fiducials:Fiducial_1mm_Dia_2.54mm_Outer_CopperTop | FID1, FID2, FID3, FID4 |
| 2 | 2N7002 | TO_SOT_Packages_SMD:SOT-23 | Q5, Q6 |
| 2 | 61400416021 | footprints:conn_usb_A | P3, P4 |
| 2 | 74AHC1G14 | TO_SOT_Packages_SMD:SOT-23-5 | U3, U5 |
| 2 | Conn_02x05_Odd_Even | Connector_IDC:IDC-Header_2x05_P2.54mm_Vertical | P5, P6 |
| 2 | ES1AL | footprints:do219ab | D1, D2 |
| 2 | MKDS 1,5/3 | footprints:cons_1,5x3 | P7, P10 |
| 1 | 4.7u | Capacitors_SMD:C_0805_HandSoldering | C9 |
| 1 | 629105136821 | footprints:conn_usb_B_micro | P2 |
| 1 | 693063020911 | EAGLE-INPUT_OUTPUT_CONNECTORS-rev17c:693063020911 | J1 |
| 1 | CONN_01X07 | Connector_PinHeader_2.54mm:PinHeader_1x07_P2.54mm_Vertical | P8 |
| 1 | FT245RL | footprints:ssop-28 | U2 |
| 1 | G2RK-2 | footprints:G2RK-2 | RL1 |
| 1 | MI0805K400R-10 | Resistors_SMD:R_0805_HandSoldering | FB1 |
| 1 | TS3A27518E | footprints:tssop-24 | U4 |
| 1 | TS3USB30EDGSR | footprints:msoic-10 | U1 |
| 1 | USB_OTG | footprints:conn_usb_B_micro | P1 |
The 51 most common of 55 parts.
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Questions
How big is the Sd mux PCB?
It measures 50 × 132 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Sd mux use?
55 parts, built around the 74AHC1G14GV, TS3A27518EPW, TS3USB30EDGSR-TP and ES1AL. 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 Sd mux KiCad files?
From the tmarkettos/sd-mux repository on GitHub, at the commit this page was made from: the board is doc/hardware/main-board/sd-mux.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the Sd mux design in my own project?
Its repository publishes it under the Apache-2.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).