2 layers100 × 100 mm
2 layers100 × 100 mm
Registers
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
- 217
- Nets
- 226
- Pads
- 1,034
- Tracks, vias
- 5,186, 1,072
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 5 (file 20171130)
- Created
- 22 Dec 2019
- Updated
- 24 Feb 2025
Overview
Registers 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 217 parts on 226 nets, routed with 5,186 tracks and 1,072 vias.
It is built around the MC74HC244ADT, 74HC161PW and MC74HC273ADT, with the SN74LV08APW, 74HC74PW and SN74AHC1G86DBVR among its other parts. Its parts include 78 resistors, 61 diodes, 36 capacitors, 32 ICs and 3 connectors. It belongs with the retro computing and games boards of this library.
Main components
11
MC74HC244ADT
TSSOP-20-55℃~+125℃ 160uA 18ns@4.5V,50pF 2 2V~6V 4 7.8mA 7.8mA 74HC Tri-State Unidirectional TSSOP-20 Buffers, Drivers, Receivers, Transceivers ROHSonsemiBuffers, Drivers, Receivers, Transceivers
74HC161PW
TSSOP-16-40℃~+125℃ 1 18ns@6V,50pF 2V~6V 4 48MHz 500mW 74HC Asynchronous Divide-by-2 Reset function、Cascade counter、Synchronous counting Rising Edge Synchronous、Asynchronous Up Counter TSSOP-16 Counters, Dividers ROHSNexperiaCounters / DividersMC74HC273ADT
TSSOP-20-55℃~+125℃ 1 10ns 10pF 25ns@6V,50pF 2V~6V 35MHz 3ns 4uA 7.8mA 7.8mA 74HC Series 8 Asynchronous D-Type Reset Rising Edge TSSOP-20 Flip Flops ROHSonsemiFlip Flops
SN74LV08APW
TSSOP-14-40℃~+125℃ 1.5V 12mA 12mA 2 20uA 2V~5.5V 3.8V 4 500mV 550mV 7.9ns@5V,50pF 74LV Series AND Gate Overvoltage-tolerant input、Rear drive protection、Local shutdown mode、Live insertion protection TSSOP-14 Logic Gates ROHSTexas InstrumentsLogic Gates74HC74PW
TSSOP-14-40℃~+125℃ 1 2 2V~6V 2ns 3.5pF 37ns@6V,50pF 40uA 5.2mA 5.2mA 74HC Series 82MHz Asynchronous Complementary D-Type Rising Edge Set and Reset TSSOP-14 Flip Flops ROHSNexperiaFlip Flops
SN74AHC1G86DBVR
SOT-23-5-40℃~+125℃ 1.5V、2.1V、3.85V 1.9V、2.58V、2.9V、3.94V、4.4V 100mV、360mV 1uA 2 2 2V~5.5V 500mV、900mV、1.65V 6.3ns@5V,50pF 74AHC XOR Gate SOT-23-5 Logic Gates ROHSTECH PUBLICLogic GatesSN74LV14APW
TSSOP-14-40℃~+125℃ 1 1.75V~3.5V 10.6ns@5V,50pF 12mA 12mA 20uA 2V~5.5V 6 74LV 750mV~1.5V Schmitt trigger 电源关断保护、噪声抑制功能 TSSOP-14 Inverters ROHSTexas InstrumentsInvertersSN74LV86APWR
TSSOP-14-40℃~+85℃ 1.5V 12mA 12mA 2 20uA 2V~5.5V 2V、2.48V、3.8V 4 400mV、440mV、550mV 500mV 74LV Series 8.8ns@5V,50pF Level shifting XOR Gate TSSOP-14 Logic Gates ROHSTexas InstrumentsLogic Gates
KP-2012EC
0805-40℃~+85℃ 15mcd 160° 2.5V 20mA 617nm 627nm 75mW Discrete Diode Red Water Clear 0805 LED Indication - Discrete ROHSKingbrightPre-Ordered TransistorsSSW-120-02-G-D-RA
弯插,P=2.54mmFemale HeadersSamtec
OS102011MS2QN1
插件-30℃~+70℃ 10000 times 100mA 12V 8mm PC Pin Rectangular Columnar SPDT Through Hole 插件 Slide Switches ROHSC&KSlide Switches
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
217| Qty | Value | Footprint | References |
|---|---|---|---|
| 61 | 620 | Resistor_SMD:R_0805_2012Metric | R10, R11, R12, R13, R118, R119, R120, R121, R122, R123, R124, R125, R126, R127, R128, R129 +45 |
| 61 | KP-2012EC | LED_SMD:LED_0805_2012Metric | D1, D2, D10, D11, D12, D13, D14, D15, D16, D17, D18, D19, D20, D21, D22, D23 +45 |
| 32 | 0.1u | Capacitor_SMD:C_0805_2012Metric | C1, C2, C10, C11, C12, C13, C14, C15, C16, C17, C18, C19, C20, C21, C22, C23 +16 |
| 12 | 10k | Resistor_SMD:R_0805_2012Metric | R3, R21, R22, R23, R24, R25, R26, R27, R28, R168, R169, R170 |
| 12 | MC74HC244ADT | Package_SO:TSSOP-20_4.4x6.5mm_P0.65mm | U2, U11, U12, U15, U16, U19, U20, U23, U24, U26, U27, U29 |
| 9 | 74HC161PW | Package_SO:TSSOP-16_4.4x5mm_P0.65mm | U4, U9, U10, U13, U14, U17, U18, U21, U22 |
| 4 | MountingHole | MountingHole:MountingHole_3.2mm_M3_DIN965 | H1, H2, H3, H4 |
| 3 | 100k | Resistor_SMD:R_0805_2012Metric | R166, R167, R171 |
| 3 | MC74HC273ADT | Package_SO:TSSOP-20_4.4x6.5mm_P0.65mm | U3, U25, U28 |
| 3 | SSW-120-02-G-D-RA | Connector_PinSocket_2.54mm:PinSocket_2x20_P2.54mm_Horizontal | J1, J2, J5 |
| 2 | 22 | Resistor_SMD:R_0805_2012Metric | R1, R2 |
| 2 | 220n | Capacitor_SMD:C_0805_2012Metric | C35, C36 |
| 2 | SN74LV08APW | Package_SO:TSSOP-14_4.4x5mm_P0.65mm | U1, U6 |
| 2 | SN74LV32APWR | Package_SO:TSSOP-14_4.4x5mm_P0.65mm | U7, U8 |
| 1 | 100u | Capacitor_Tantalum_SMD:CP_EIA-3528-21_Kemet-B_Pad1.50x2.35mm_HandSolder | C38 |
| 1 | 74HC74PW | Package_SO:TSSOP-14_4.4x5mm_P0.65mm | U30 |
| 1 | C | Capacitor_SMD:C_0805_2012Metric | C34 |
| 1 | OS102011MS2QN1 | Button_Switch_THT:SW_Slide_1P2T_CK_OS102011MS2Q | SW3 |
| 1 | RESET | Button_Switch_THT:SW_PUSH_6mm | SW1 |
| 1 | SN74AHC1G86DBVR | Package_TO_SOT_SMD:SOT-23-5 | U31 |
| 1 | SN74LV14APW | Package_SO:TSSOP-14_4.4x5mm_P0.65mm | U34 |
| 1 | SN74LV86APWR | Package_SO:TSSOP-14_4.4x5mm_P0.65mm | U5 |
| 1 | STEP | Button_Switch_THT:SW_PUSH_6mm | SW2 |
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Questions
How big is the Registers PCB?
It measures 100 × 100 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Registers use?
217 parts, built around the MC74HC244ADT, 74HC161PW, MC74HC273ADT and SN74LV08APW. 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 Registers KiCad files?
From the imihajlow/ccpu repository on GitHub, at the commit this page was made from: the board is boards/registers/registers.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 Registers design in my own project?
Its repository states no licence, so its author keeps all rights: ask imihajlow before reusing the design.