2 layers200 × 300 mm
2 layers200 × 300 mm
Final alu
KN-Breadboard-Computing/computer- Size
- 200 × 300 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 113
- Nets
- 246
- Pads
- 842
- Tracks, vias
- 2,574, 215
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 8.0 (file 20240108)
- Created
- 30 Nov 2022
- Updated
- 11 Jul 2025
Overview
Final alu is an open-source printed circuit board by KN-Breadboard-Computing, from the KN-Breadboard-Computing/computer repository on GitHub. It is a 2-layer board of 200 × 300 mm with 113 parts on 246 nets, routed with 2,574 tracks and 215 vias.
It is built around the SN74AC245N, CD4030BEE4 and CD4081BEE4, with the SN74HC151NS, CD4071BEE4 and DS1013-20SSIB1-B-0 among its other parts.
Main components
8
SN74AC245N
PDIP-20-40℃~+85℃ 1 24mA 24mA 2V~6V 3.5ns@5V,50pF 40uA 74AC 8 Bidirectional Tri-State PDIP-20 Buffers, Drivers, Receivers, Transceivers ROHSTexas InstrumentsBuffers, Drivers, Receivers, Transceivers
CD4030BEE4
PDIP-14-55℃~+125℃ 1.5V、3V、4V 100ns@15V,50pF、130ns@10V,50pF、280ns@5V,50pF 1mA 250nA 3.2mA 3.5V、7V、11V 3V~18V 4 4.95V、9.95V、14.95V 50mV CD4 XOR Gate PDIP-14 Logic Gates ROHSTexas InstrumentsLogic GatesCD4081BEE4
PDIP-14-55℃~+125℃ 1.5V 2 250ns@5V,50pF 3.5V 3V~18V 4 4.2mA 4.95V 50mV 6.8mA 7.5uA AND Gate CD4 PDIP-14 Logic Gates ROHSTexas InstrumentsLogic Gates
SN74HC151NS
SO-16-208mil-40℃~+85℃ 22ns@6V,50pF 2V~6V 7.8mA 7.8mA 74HC 8/1 8uA Single Supply SO-16-208mil Signal Switches, Multiplexers, Decoders ROHSTexas InstrumentsSignal Switches, Multiplexers, DecodersCD4071BEE4
PDIP-14-55℃~+125℃ 1.5V 1mA 1mA 2 250ns@5V,50pF 250uA 3.5V 3V~18V 4 4.95V 50mV CD4 OR Gate PDIP-14 Logic Gates ROHSTexas InstrumentsLogic Gates
DS1013-20SSIB1-B-0
插件,P=2.54mm-40℃~+105℃ 10 2 2.54mm 2.54mm 2x10P 3A Black Gold IDC Header Through Hole 插件,P=2.54mm IDC Connectors ROHSCONNFLY ElecIDC Connectors
SN74HC574N
DIP-20-40℃~+85℃ 1 21ns 2V~6V 36MHz 3pF 46ns@6V,150pF 5ns 7.8mA 7.8mA 74HC Series 8 8uA D-Type Enable Rising Edge Tri-State DIP-20 Flip Flops ROHSTexas InstrumentsFlip Flops
AT28C64B-15PU
DIP-28-600mil-40℃~+85℃ 10 Years 100,000 cycles 10ms 4.5V~5.5V 64Kbit Hardware write protection function、Software write protection function、Built-in error correction code (ECC) function Parallel Port (Parallel) DIP-28-600mil EEPROM ROHSMicrochip TechnologyEEPROM
README
README.mdElectronics Of 8-bit CPU
Parts
113| Qty | Value | Footprint | References |
|---|---|---|---|
| 32 | LED | LED_THT:LED_D5.0mm_FlatTop | LED_AL0, LED_AL1, LED_AL2, LED_AL3, LED_AL4, LED_AL5, LED_AL6, LED_AL7, LED_RA0, LED_RA1, LED_RA2, LED_RA3, LED_RA4, LED_RA5, LED_RA6, LED_RA7 +16 |
| 32 | R_US | Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P7.62mm_Horizontal | R_AL0, R_AL1, R_AL2, R_AL3, R_AL4, R_AL5, R_AL6, R_AL7, R_RA0, R_RA1, R_RA2, R_RA3, R_RA4, R_RA5, R_RA6, R_RA7 +16 |
| 13 | CD4030BEE4 | Package_DIP:DIP-14_W7.62mm | XOR-GATE-A-OR-B0, XOR-GATE-A-OR-B1, XOR-GATE-A0, XOR-GATE-A1, XOR-GATE-AB0, XOR-GATE-AB1, XOR-GATE-ADDER0, XOR-GATE-ADDER1, XOR-GATE-ADDER2, XOR-GATE-ADDER3, XOR-GATE-B0, XOR-GATE-B1, XOR-GATE-OVERFLOW1 |
| 10 | CD4081BEE4 | Package_DIP:DIP-14_W7.62mm | AND-GATE_ADDER1, AND-GATE-A0, AND-GATE-A1, AND-GATE-ADDER0, AND-GATE-ADDER2, AND-GATE-ADDER3, AND-GATE-B0, AND-GATE-B1, AND-GATE-ZERO0, AND-GATE-ZERO1 |
| 8 | SN74HC151N | Package_DIP:DIP-16_W7.62mm | MULTIPLEXER0, MULTIPLEXER1, MULTIPLEXER2, MULTIPLEXER3, MULTIPLEXER4, MULTIPLEXER5, MULTIPLEXER6, MULTIPLEXER7 |
| 5 | CD4071BEE4 | Package_DIP:DIP-14_W7.62mm | OR-GATE-AB0, OR-GATE-AB1, OR-GATE-ADDER0, OR-GATE-ADDER1, OR-GATE-CARRY1 |
| 3 | DS1013-20SSIB1-B-0 | Connector_PinSocket_2.54mm:PinSocket_2x10_P2.54mm_Vertical | IDC-DATA-BUS1, IDC-FLAGS1, IDC-SIGNALS1 |
| 3 | SN74HC574N | Package_DIP:DIP-20_W7.62mm | REGISTER-A1, REGISTER-B1, REGISTER-F1 |
| 2 | SN74AC245N | Package_DIP:DIP-20_W7.62mm | FLAG-TRANSCEIVER1, RESULT-TRANSCEIVER1 |
| 2 | ~ | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | C1, C2 |
| 1 | AT28C64B-15PU | Package_DIP:DIP-28_W15.24mm | INTERNAL-SIGNALS-EEPROM1 |
| 1 | Conn2 | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | Supply1 |
| 1 | LOGO | additional-libraries:bb-logo | G*** |
Questions
How big is the Final alu PCB?
It measures 200 × 300 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Final alu use?
113 parts, built around the SN74AC245N, CD4030BEE4, CD4081BEE4 and SN74HC151NS. 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 Final alu KiCad files?
From the KN-Breadboard-Computing/computer repository on GitHub, at the commit this page was made from: the board is schematics/final-alu/final-alu.kicad_pcb and its schematic schematics/arithmetic-logic-unit/arithmetic-logic-unit.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Final alu design in my own project?
Its repository states no licence, so its author keeps all rights: ask KN-Breadboard-Computing before reusing the design.
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