2 layers200 × 300 mm
2 layers200 × 300 mm
Final memory
KN-Breadboard-Computing/computer- Size
- 200 × 300 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 216
- Nets
- 345
- Pads
- 1,160
- Tracks, vias
- 3,053, 324
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 8.0 (file 20240108)
- Created
- 30 Nov 2022
- Updated
- 11 Jul 2025
Overview
Final memory 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 216 parts on 345 nets, routed with 3,053 tracks and 324 vias.
It is built around the SN74AC245N, CD74HC193E and SN74HC574N, with the DS1013-20SSIB1-B-0, CD4081BEE4 and CD74HC04E 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
CD74HC193E
PDIP-16-55℃~+125℃ 1 29MHz 2V~6V Asynchronous Rising Edge Synchronous Up Counter、Down Counter PDIP-16 Counters, Dividers ROHSTexas InstrumentsCounters, Dividers
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
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
CD4081BEE4
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 GatesCD74HC04E
PDIP-14-55℃~+125℃ 1.5V~4.2V 1.9V、4.4V、5.9V 14ns@6V,50pF 2V~6V 2uA 5.2mA 5.2mA 500mV~1.8V 6 74HC PDIP-14 Inverters ROHSTexas InstrumentsInverters
AS6C1008-55PCN
PDIP-320℃~+70℃ 1Mbit 1uA 2.7V~5.5V 55ns 60mA PDIP-32 SRAM ROHSAlliance MemorySRAMCD4071BEE4
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
README
README.mdElectronics Of 8-bit CPU
Parts
216| Qty | Value | Footprint | References |
|---|---|---|---|
| 96 | R_US | Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P7.62mm_Horizontal | R_BTTN0, R_BTTN1, R_BTTN2, R_BTTN10, R_BTTN11, R_BTTN12, R_BTTN13, R_BTTN14, R_BTTN15, R_BTTN16, R_BTTN17, R_BTTN18, R_BTTN19, R_BTTN20, R_BTTN21, RR_RMBR0 +80 |
| 72 | LED | LED_THT:LED_D5.0mm_FlatTop | LED_PC0, LED_PC1, LED_PC2, LED_PC3, LED_PC4, LED_PC5, LED_PC6, LED_PC7, LED_PC8, LED_PC9, LED_PC10, LED_PC11, LED_PC12, LED_PC13, LED_PC14, LED_PC15 +56 |
| 18 | SN74AC245N | Package_DIP:DIP-20_W7.62mm | TRANSCEIVER-PC0, TRANSCEIVER-PC1, TRANSCEIVER-STC0, TRANSCEIVER-STC1, TRANSCEIVER-TMP0, TRANSCEIVER-TMP1, TRANSCEIVER-TMP2, TRANSCEIVER-TMP3, TRANSCEIVER-TMP4, TRANSCEIVER-TMP5, TRNS-BTTNS-MAR0, TRNS-BTTNS-MAR1, TRNS-BTTNS-MBR1, TRNS-BUS-MAR0, TRNS-BUS-MAR1, TRNS-BUS-MBR1 +2 |
| 8 | CD74HC193E | Package_DIP:DIP-16_W7.62mm | COUNTER-PC0, COUNTER-PC1, COUNTER-PC2, COUNTER-PC3, COUNTER-STC0, COUNTER-STC1, COUNTER-STC2, COUNTER-STC3 |
| 5 | SN74HC574N | Package_DIP:DIP-20_W7.62mm | REGISTER-MAR0, REGISTER-MAR1, REGISTER-MBR1, REGISTER-TMPH1, REGISTER-TMPL1 |
| 4 | DS1013-20SSIB1-B-0 | Connector_PinSocket_2.54mm:PinSocket_2x10_P2.54mm_Vertical | IDC-ADDRESS-BUS1, IDC-DATA-BUS1, IDC-SIGNALS1, IDC-SIGNALS2 |
| 3 | SW_DIP_x08 | Button_Switch_THT:SW_DIP_SPSTx08_Slide_6.7x21.88mm_W7.62mm_P2.54mm_LowProfile | BTTNS-MAR0, BTTNS-MAR1, BTTNS-MBR1 |
| 2 | CD4081BEE4 | Package_DIP:DIP-14_W7.62mm | AND-GATE-ZERO-PAGE1, AND-GATE-ZERO-PAGE2 |
| 2 | CD74HC04E | Package_DIP:DIP-14_W7.62mm | NOT-GATE-BUS1, NOT-GATE-STC1 |
| 1 | AS6C1008-55PCN | Package_DIP:DIP-32_W15.24mm | MEMORY1 |
| 1 | C | Capacitor_THT:C_Disc_D3.0mm_W1.6mm_P2.50mm | C2 |
| 1 | CD4071BEE4 | Package_DIP:DIP-14_W7.62mm | OR-GATE-STC1 |
| 1 | CONN-1x2 | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | SUPPLY1 |
| 1 | C_Polarized_US | Capacitor_THT:CP_Radial_D5.0mm_P2.50mm | C1 |
| 1 | LOGO | additional-libraries:bb-logo | G*** |
Questions
How big is the Final memory PCB?
It measures 200 × 300 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Final memory use?
216 parts, built around the SN74AC245N, CD74HC193E, SN74HC574N and DS1013-20SSIB1-B-0. 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 memory KiCad files?
From the KN-Breadboard-Computing/computer repository on GitHub, at the commit this page was made from: the board is schematics/final-memory/final-memory.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 memory 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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