2 layers100 × 100 mm
2 layers100 × 100 mm
Stack
imihajlow/ccpu145A 8-bit computer made of 74xx series logic gates and memory ICs.
- Size
- 100 × 100 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 79
- Nets
- 143
- Pads
- 553
- Tracks, vias
- 2,008, 574
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 5 (file 20171130)
- Created
- 22 Dec 2019
- Updated
- 24 Feb 2025
Overview
Stack is an open-source printed circuit board by imihajlow, from the imihajlow/ccpu repository on GitHub. It is a 2-layer board of 100 × 100 mm with 79 parts on 143 nets, routed with 2,008 tracks and 574 vias.
It is built around the 74HC244D, 74HC32D and 74AHC1G86SE, with the 74HC00D, 74HC139D and 74HC74D among its other parts. Its parts include 18 capacitors, 18 resistors, 18 diodes, 17 ICs and 4 connectors. It belongs with the retro computing and games boards of this library.
Main components
9
74HC244D
SO-20-300mil-40℃~+125℃ 160uA 2 2V~6V 4 6mA 6mA 74HC 9ns@5V,15pF Tri-State Unidirectional SOIC-20-300mil Buffers, Drivers, Receivers, Transceivers ROHSNexperiaBuffers, Drivers, Receivers, Transceivers
74HC32D
SOP-14-40℃~+125℃ 1.5V~4.2V 1.9V、4.4V、5.9V 100mV、400mV、400mV 2 2V~6V 2uA 4 5.2mA 5.2mA 500mV~1.8V 6ns@6V,50pF 74HC Series OR Gate SOIC-14 Logic Gates ROHSNexperiaLogic Gates
74AHC1G86SE
SOT-353-40℃~+125℃ 1 1.5V~3.85V 1uA 2V~5.5V 500mV~1.65V 74AHC Series 8.8ns@5V,50pF 8mA 8mA XOR Gate SOT-353 Logic Gates ROHSDiodes IncorporatedLogic Gates74HC00D
SOP-14-40℃~+125℃ 1.5V、3.15V、4.2V 1.9V、3.7V、5.9V 100mV、400mV、400mV 2 2V~6V 4 40uA 5.2mA 5.2mA 500mV~1.8V 74HC Series 7ns@6V,50pF NAND Gate SOIC-14 Logic Gates ROHSNexperiaLogic Gates
74HC139D
SO-16-40℃~+125℃ 11ns@6.0V,50pF 160uA 2/4 2V~6V 74HC Decoder Single Supply SOIC-16 Signal Switches, Multiplexers, Decoders ROHSNexperiaSignal Switches / Encoders & Decoders / Multiplexers74HC74D
SOIC-14-40℃~+125℃ 1 15ns 2 2V~6V 3.5pF 37ns@6V,50pF 3ns、3ns、3ns 40uA 5.2mA 5.2mA 74HC Series 82MHz Asynchronous Complementary D-Type Rising Edge Set and Reset SOIC-14 Flip Flops ROHSNexperiaFlip Flops
IS61C5128AS-25QLI
SOP-32-11.3mm-40℃~+85℃ 15mA 25ns 4.5V~5.5V 4Mbit 900uA Auto power-down function Parallel Port (Parallel) SOP-32-11.3mm SRAM ROHSISSISRAMSSW-120-02-G-D-RA
弯插,P=2.54mmFemale HeadersSamtec
APT2012CGCK
0805-40℃~+85℃ 140° 2.1V 20mA 50mcd 570nm 574nm 75mW Discrete Diode Water Clear Yellow Green 0805 LED Indication - Discrete ROHSKingbrightLED Indication - Discrete
README
README.mdA 74xx discrete logic IC-based computer.
Folder structure:
doc- documentationmodel- Verilog model and test benchesboards- KiCAD designs of the computertools- various tools: ALU generator, assembler, linker, compiler, simulator.app- software tests and applications
Parts
79| Qty | Value | Footprint | References |
|---|---|---|---|
| 18 | 160 | Resistor_SMD:R_0805_2012Metric | R1, R2, R3, R4, R5, R6, R7, R10, R11, R12, R13, R14, R15, R16, R17, R18 +2 |
| 17 | 0.1 | Capacitor_SMD:C_0805_2012Metric | C1, C2, C3, C4, C5, C6, C7, C8, C10, C11, C12, C13, C14, C15, C16, C18 +1 |
| 16 | EAST2012RA1 | LED_SMD:LED_0805_2012Metric | D1, D2, D3, D4, D5, D6, D7, D8, D9, D10, D11, D12, D13, D14, D15, D16 |
| 4 | 74HC244 | Package_SO:TSSOP-20_4.4x6.5mm_P0.65mm | U5, U6, U9, U10 |
| 4 | 74HC32 | Package_SO:TSSOP-14_4.4x5mm_P0.65mm | U12, U13, U16, U17 |
| 4 | MountingHole | MountingHole:MountingHole_3.2mm_M3 | H1, H2, H3, H4 |
| 4 | SN74HC193PWR | Package_SO:TSSOP-16_4.4x5mm_P0.65mm | U3, U4, U7, U8 |
| 3 | SSW-120-02-G-D-RA | Connector_PinSocket_2.54mm:PinSocket_2x20_P2.54mm_Horizontal | J1, J3, J4 |
| 2 | APT2012CGCK | LED_SMD:LED_0805_2012Metric | D17, D18 |
| 1 | 61304021021 | Connector_PinHeader_2.54mm:PinHeader_2x20_P2.54mm_Horizontal | J2 |
| 1 | 74AHC1G86 | Package_TO_SOT_SMD:SOT-23-5 | U15 |
| 1 | 74HC00 | Package_SO:TSSOP-14_4.4x5mm_P0.65mm | U14 |
| 1 | 74HC139 | Package_SO:TSSOP-16_4.4x5mm_P0.65mm | U1 |
| 1 | 74HC74 | Package_SO:TSSOP-14_4.4x5mm_P0.65mm | U11 |
| 1 | F931C336MBAAJ6 | Capacitor_Tantalum_SMD:CP_EIA-3528-21_Kemet-B_Pad1.50x2.35mm_HandSolder | C17 |
| 1 | IS61C5128AS-25QLI | Package_SO:SSOP-32_11.305x20.495mm_P1.27mm | U2 |
Questions
How big is the Stack PCB?
It measures 100 × 100 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Stack use?
79 parts, built around the 74HC244D, 74HC32D, 74AHC1G86SE and 74HC00D. 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 Stack KiCad files?
From the imihajlow/ccpu repository on GitHub, at the commit this page was made from: the board is boards/stack/stack.kicad_pcb and its schematic boards/eth/eth.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Stack design in my own project?
Its repository states no licence, so its author keeps all rights: ask imihajlow before reusing the design.
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