4 layers304.5 × 217.2 mm
Latest Full Backplane
Trilobyte-CPU/8-bit-computer
A DIY 8-bit computer built mostly with discrete logic chips
478 parts2
4 layers56.6 × 39.4 mm
ALU Arithmetic
Trilobyte-CPU/8-bit-computer2A DIY 8-bit computer built mostly with discrete logic chips
- Size
- 56.6 × 39.4 mm
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 18
- Nets
- 71
- Pads
- 194
- Tracks, vias
- 729, 85
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 6 (file 20211014)
- Created
- 20 Apr 2021
- Updated
- 9 Nov 2022
Overview
ALU Arithmetic is an open-source printed circuit board by Trilobyte-CPU, from the Trilobyte-CPU/8-bit-computer repository on GitHub. It is a 4-layer board of 56.6 × 39.4 mm with 18 parts on 71 nets, routed with 729 tracks and 85 vias.
It is built around the 74LS245SC, 74HC157D and 74HC86D, with the 74HC04D, 74HC08D and 74HC32D among its other parts. Its parts include 10 ICs, 4 capacitors and 4 connectors.
Main components
674LS245SC
-0℃~+70℃ 12ns@5V,45pF 15mA 24mA 4.75V~5.25V 74LS 8 Bidirectional Output enable Schmitt trigger Tri-State - Buffers, Drivers, Receivers, Transceivers ROHSTexas InstrumentsBuffers, Drivers, Receivers, Transceivers
74HC157D
SO-16-40℃~+125℃ 10ns@6.0V,50pF 160uA 2V~6V 5.2mA 5.2mA 74HC 8/4 Multiplexer Single Supply SOIC-16 Signal Switches, Multiplexers, Decoders ROHSNexperiaSignal Switches / Encoders & Decoders / Multiplexers
74HC86D
SO-14-40℃~+125℃ 1.5V~4.2V 20ns@6V,50pF 2V~6V 2uA 4 5.2mA 5.2mA 500mV~1.8V 74HC Series XOR Gate SOIC-14 Logic Gates ROHSNexperiaLogic Gates74HC04D
SOP-14-40℃~+125℃ 1 1.5V~4.2V 1.9V、3.7V、5.2V 100mV、400mV、400mV 14ns@6V,50pF 2V~6V 2uA 5.2mA 5.2mA 500mV~1.8V 6 74HC SOIC-14 Inverters ROHSNexperiaInverters74HC08D
SOP-14-40℃~+125℃ 1.5V~4.2V 1.9V、3.7V、5.2V 100mV、400mV 2 27ns@4.5V,50pF 2V~6V 2uA 4 5.2mA 5.2mA 500mV~1.8V 74HC Series AND Gate SOIC-14 Logic Gates ROHSNexperiaLogic Gates74HC32D
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
Parts
18| Qty | Value | Footprint | References |
|---|---|---|---|
| 4 | C | Capacitor_SMD:C_0805_2012Metric | C1, C2, C3, C4 |
| 4 | Conn_01x08 | Connector_PinHeader_2.54mm:PinHeader_1x08_P2.54mm_Vertical | J1, J2, J3, J4 |
| 2 | 74HC157 | Package_SO:TSSOP-16_4.4x5mm_P0.65mm | U1, U2 |
| 2 | 74HC86 | Package_SO:TSSOP-14_4.4x5mm_P0.65mm | U3, U4 |
| 2 | 74LS283 | Package_SO:SOIC-16W_5.3x10.2mm_P1.27mm | U5, U6 |
| 1 | 74HC04 | Package_SO:TSSOP-14_4.4x5mm_P0.65mm | U32 |
| 1 | 74HC08 | Package_SO:TSSOP-14_4.4x5mm_P0.65mm | U33 |
| 1 | 74HC32 | Package_SO:TSSOP-14_4.4x5mm_P0.65mm | U34 |
| 1 | 74LS245 | Package_SO:TSSOP-20_4.4x6.5mm_P0.65mm | U7 |
Questions
How big is the ALU Arithmetic PCB?
It measures 56.6 × 39.4 mm and has 4 copper layers, 1.6 mm thick.
What parts does the ALU Arithmetic use?
18 parts, built around the 74LS245SC, 74HC157D, 74HC86D and 74HC04D. 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 ALU Arithmetic KiCad files?
From the Trilobyte-CPU/8-bit-computer repository on GitHub, at the commit this page was made from: the board is PCBs/03_MODULES/CPU-ALU/ALU-Arithmetic/ALU-Arithmetic.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the ALU Arithmetic design in my own project?
Its repository states no licence, so its author keeps all rights: ask Trilobyte-CPU before reusing the design.
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