4 layers293 × 406 mm
4 layers153 × 81 mm
Input Output Module
SSCsimsi/8Bit_Computer- Size
- 153 × 81 mm
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 150
- Nets
- 148
- Pads
- 643
- Tracks, vias
- 1,487, 598
- Pours
- 4
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 20 Jun 2023
- Updated
- 28 Apr 2026
Overview
Input Output Module is an open-source printed circuit board by SSCsimsi, from the SSCsimsi/8Bit_Computer repository on GitHub. It is a 4-layer board of 153 × 81 mm with 150 parts on 148 nets, routed with 1,487 tracks and 598 vias.
It is built around the MP2338GTL-Z, SN74LVC1G14DBVR and SN74AHC74DRE4, with the SN74LVC1G08DBVR, DS1100Z-150+ and SN74LVC1G32DBVR among its other parts. Its parts include 46 capacitors, 36 resistors, 31 ICs, 24 diodes and 9 switches.
Main components
12
MP2338GTL-Z
SOT-583-40℃~+125℃ 1 160uA 3A 4.5V~28V 450kHz 500mV~16V Adjustable Buck Buck Built-in Yes SOT-583 DC-DC Converters ROHSMonolithic Power SystemsDC-DC Converters
SN74LVC1G14DBVR
SOT-23-5-40℃~+125℃ 1 1 1.65V~5.5V 10uA 24mA 24mA 6ns@4.5V~5.5V,50pF 74LVC SOT-23-5 Inverters ROHSTECH PUBLICLogic Gates
SN74AHC74DRE4
-Flip FlopsTexas InstrumentsSN74LVC1G08DBVR
SOT-23-5-40℃~+85℃ 1 1.65V~5.5V 1.7V、2V 100nA 2 3.4ns@5V,15pF 32mA 32mA 350mV 4V 700mV、800mV 74LVC AND Gate Local shutdown mode SOT-23-5 Logic Gates ROHSTWGMCLogic Gates
DS1100Z-150+
SOIC-8-40℃~+85℃ 150ns 4.75V~5.25V SOIC-8 Time Delays ROHSMaxim Integrated (Analog Devices)Time DelaysSN74LVC1G32DBVR
SOT-23-5SOT-23-5 Logic Gates ROHSTECH PUBLICLogic GatesSN74LVC1G86DBVR-TP
SOT-23-5-40℃~+125℃ 1 1.2V、1.9V、2.3V、2.4V、3.8V 1.65V~5.5V 10uA 2 300mV、400mV、450mV、550mV 32mA 32mA 4ns@3.3V,50pF 74LVC XOR Gate SOT-23-5 Logic Gates ROHSTECH PUBLICLogic Gates
LTST-C170KRKT
0805-55℃~+85℃ 130° 20mA 2V 54mcd 631nm 639nm 75mW Discrete Diode Red Water Clear 0805 LED Indication - Discrete ROHSLite-OnLED Indication - DiscreteLTST-C171TBKT
0805-20℃~+80℃ 104mcd 130° 20mA 3.3V 465nm~475nm 468nm 76mW Blue Discrete Diode Water Clear 0805 LED Indication - Discrete ROHSLite-OnLED Indication - DiscreteLTST-C170KFKT
0805-55℃~+85℃ 130° 20mA 2V 605nm 611nm 75mW 90mcd Discrete Diode Orange Water Clear 0805 LED Indication - Discrete ROHSLite-OnLED Indication - Discrete
1N4148WS-7-F-CN
SOD-323Switching DiodesChipNoboM20-8890845
SMD,P=2.54mm,卧贴-40℃~+105℃ 1 2.54mm 3A 8P Black Brass Surface Mount, Right Angle SMD,P=2.54mm,卧贴 Pin Headers ROHSHarwinPin Headers
README
README.mdComputer_HTL
Parts
150| Qty | Value | Footprint | References |
|---|---|---|---|
| 39 | 100nF | Capacitor_SMD:C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C174, C181, C183, C184, C185, C186, C187, C188, C189, C190, C191, C192, C193, C194, C195, C196 +23 |
| 9 | 4.7k | Resistor_SMD:R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R31, R35, R39, R42, R45, R50, R54, R57, R60 |
| 9 | SN74LVC1G14DBVR | Samacsys:SOT95P280X145-5N | IC239, IC241, IC244, IC245, IC246, IC248, IC249, IC252, IC273 |
| 8 | 270 | Resistor_SMD:R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R46, R48, R51, R53, R56, R58, R59, R61 |
| 8 | 2MS1T2B3M2QES | Samacsys:2MS1T2B3M2QES | S3, S4, S5, S6, S7, S8, S9, S10 |
| 8 | 390 | Resistor_SMD:R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R40, R41, R43, R44, R47, R49, R52, R55 |
| 8 | LTST-C170KRKT | Samacsys:LEDC2012X120N | LED1, LED2, LED3, LED4, LED6, LED8, LED10, LED12 |
| 8 | LTST-C171TBKT | Samacsys:LTSTC171TBKT | LED5, LED7, LED9, LED11, LED13, LED14, LED15, LED16 |
| 5 | 150 | Resistor_SMD:R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R72, R73, R74, R75, R76 |
| 5 | LTST-C170KFKT | Samacsys:LEDC2012X120N | LED17, LED18, LED19, LED20, LED21 |
| 5 | SN74F521DWR | Samacsys:SOIC127P1030X265-20N | IC236, IC237, IC242, IC243, IC272 |
| 4 | SN74AHC74DR | Samacsys:SOIC127P600X175-14N | IC250, IC253, IC254, IC257 |
| 3 | 10k | Resistor_SMD:R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R32, R36, R38 |
| 3 | 1N4148WS-7-F | Samacsys:SOD2513X120N | D28, D29, D31 |
| 3 | 22uF | Capacitor_SMD:C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C175, C176, C177 |
| 3 | M20-8890845 | Samacsys:M208890845 | J32, J33, J34 |
| 3 | SN74ABT245BDWR | Samacsys:SOIC127P1030X265-20N | IC256, IC259, IC260 |
| 2 | 0.1uF | Capacitor_SMD:C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C178, C179 |
| 2 | SN74ABT574ADWR | Samacsys:SOIC127P1030X265-20N | IC247, IC255 |
| 2 | SN74AHC540DWR | Samacsys:SOIC127P1030X265-20N | IC262, IC263 |
| 2 | SN74LVC1G08DBVR | Samacsys:SOT95P280X145-5N | IC251, IC258 |
| 1 | 191k | Resistor_SMD:R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R33 |
| 1 | 22nF | Capacitor_SMD:C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C180 |
| 1 | 300pF | Capacitor_SMD:C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C182 |
| 1 | 49.9k | Resistor_SMD:R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R34 |
| 1 | 6.8uH | Samacsys:INDPM108100X400N | L4 |
| 1 | 90.9k | Resistor_SMD:R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R37 |
| 1 | B3FS-4055P | Samacsys:B3FS4055P | S2 |
| 1 | DS1100Z-150+ | Samacsys:SOIC127P600X175-8N | IC238 |
| 1 | MP2338GTL-Z | Samacsys:MP2338GTLZ | IC261 |
| 1 | SN74LVC1G32DBVR | Samacsys:SOT95P280X145-5N | IC102 |
| 1 | SN74LVC1G86DBVR | Samacsys:SOT95P280X145-5N | IC240 |
Questions
How big is the Input Output Module PCB?
It measures 153 × 81 mm and has 4 copper layers, 1.6 mm thick.
What parts does the Input Output Module use?
150 parts, built around the MP2338GTL-Z, SN74LVC1G14DBVR, SN74AHC74DRE4 and SN74LVC1G08DBVR. 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 Input Output Module KiCad files?
From the SSCsimsi/8Bit_Computer repository on GitHub, at the commit this page was made from: the board is 8Bit Computer ver2.0/Kicad/Computer/Input_Output_Module.kicad_pcb and its schematic 8Bit Computer ver2.0/Kicad/ClockGen/ClockGen.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Input Output Module design in my own project?
Its repository states no licence, so its author keeps all rights: ask SSCsimsi before reusing the design.
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