SBC 8080 ECB
About the SBC 8080 ECB PCB
SBC 8080 ECB is an open source PCB design by sladek, published on GitHub. It is a 2-layer board measuring 160.5 × 100.2 mm, with 111 components from 64 distinct parts.
Other key parts include the 8224, 8228, 74LS08, 74LS125 and 74LS04. By type, the board carries 45 capacitors, 30 ICs, 14 resistors, 6 jumpers, 6 diodes and 4 connectors.
It belongs with the power & battery and retro computing designs in this gallery.
From the project
This is my attempt to build a single-board microcomputer based on the Intel 8080 CPU. It contains the following features:
This is my attempt to build a single-board microcomputer based on the Intel 8080 CPU. It contains the following features:
- Extended 512k x 8-bit SRAM that can be fully accessed via paging.
- 128 x 8-bit FLASH EPROM that is accessible after RESET so it can contain a bootloader, which can be moved to SRAM and boot the operating system or monitor program.
- Programmable Interrupt Controller Intel 8259.
Main components on the SBC 8080 ECB
SBC 8080 ECB bill of materials (BOM)
111 components, 64 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | 8224 | DIP-16_W7.62mm_Socket | IC1 |
| 1 | 8228 | DIP-28_W15.24mm_Socket | IC2 |
| 2 | 74LS08 | DIP-14_W7.62mm_Socket | U1, U30 |
| 2 | 74LS125 | DIP-14_W7.62mm_Socket | U2, U6 |
| 1 | 74LS04 | DIP-14_W7.62mm_Socket | U3 |
| 1 | 74LS74 | DIP-14_W7.62mm_Socket | U4 |
| 1 | 8080A | DIP-40_W15.24mm_Socket | U5 |
| 1 | LT1109A | DIP-8_W7.62mm_Socket | U7 |
| 1 | TC7660H | DIP-8_W7.62mm_Socket | U9 |
| 1 | C96ABC | DIN41612_C_3x32_Male_Horizontal_THT | U10 |
| 3 | 74LS245 | DIP-20_W7.62mm_Socket | U11, U12, U14 |
| 1 | 74LS243 | DIP-14_W7.62mm_Socket | U13 |
| 1 | 74LS244 | DIP-20_W7.62mm_Socket | U15 |
| 1 | 74LS240 | DIP-20_W7.62mm_Socket | U16 |
| 1 | 74LS390 | DIP-16_W7.62mm_Socket | U17 |
| 1 | 8253 | DIP-24_W15.24mm_Socket | U18 |
| 1 | 8259A | DIP-28_W15.24mm_Socket | U19 |
| 1 | 8251 | DIP-28_W15.24mm_Socket | U20 |
| 1 | MAX232 | DIP-16_W7.62mm_Socket | U21 |
| 1 | 74HC374 | DIP-20_W7.62mm_Socket | U22 |
Show 44 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | 74LS138 | DIP-16_W7.62mm_Socket | U23 |
| 1 | 74LS00 | DIP-14_W7.62mm_Socket | U24 |
| 2 | 74LS32 | DIP-14_W7.62mm_Socket | U25, U27 |
| 1 | AS6C4008-55PCN | DIP-32_W15.24mm_Socket | U28 |
| 1 | SST39SF010 | DIP-32_W15.24mm_Socket | U29 |
| 1 | IRF4905LPBF | TO254P483X1016X1501-3P | Q1 |
| 1 | PN2222A | TO-92_Inline | Q2 |
| 1 | 18,432MHz | Crystal_HC49-U_Vertical | Y1 |
| 1 | +5V/5A | 694106301002_1 | J1 |
| 1 | SPEAKER | PinHeader_1x04_P2.54mm_Vertical | J2 |
| 1 | CONN_01X07 Conn_01x07 | PinSocket_1x07_P2.54mm_Vertical | J3 |
| 1 | RS232 | PinHeader_2x05_P2.54mm_Vertical | J4 |
| 1 | JUMPER_3_BRIDGED23 Jumper_3_Bridged23 | PinHeader_1x03_P2.54mm_Vertical | JP1 |
| 4 | JUMPER_3_BRIDGED12 Jumper_3_Bridged12 | PinHeader_1x03_P2.54mm_Vertical | JP2, JP3, JP4, JP6 |
| 1 | BANK0/BANK1 Bank0/Bank1 | PinHeader_1x02_P2.54mm_Vertical | JP5 |
| 1 | AT-1224-TWT-R | MagneticBuzzer_ProSignal_ABT-410-RC | SP1 |
| 1 | RESET | PinHeader_1x02_P2.54mm_Vertical | SW1 |
| 1 | 1N4148 | D_DO-35_SOD27_P7.62mm_Horizontal | D1 |
| 1 | HALT | LED_D3.0mm | D2 |
| 1 | +5VP | LED_D3.0mm | D3 |
| 1 | DISK | LED_D3.0mm | D4 |
| 1 | RUN | LED_D3.0mm | D5 |
| 1 | 1N5818 | D_DO-41_SOD81_P10.16mm_Horizontal | D6 |
| 1 | 33UF 33uF | L_Radial_D6.0mm_P4.00mm | L1 |
| 1 | 39P 39p | C_Disc_D5.0mm_W2.5mm_P2.50mm | C1 |
| 1 | 4U7 4u7 | CP_Radial_D4.0mm_P1.50mm | C2 |
| 2 | 470UF 470uF | CP_Radial_D6.3mm_P2.50mm | C3, C5 |
| 31 | 0.1UF 0.1uF | C_Disc_D4.3mm_W1.9mm_P5.00mm | C4, C6, C7, C8, C9, C10, C11, C12 +23 |
| 1 | 47UF 47uF | CP_Radial_D5.0mm_P2.00mm | C16 |
| 2 | 1.0UF 1.0uF | C_Disc_D4.7mm_W2.5mm_P5.00mm | C17, C19 |
| 1 | 0.01UF 0.01uF | C_Disc_D3.0mm_W1.6mm_P2.50mm | C21 |
| 4 | 1.0 uF | C_Rect_L7.2mm_W3.0mm_P5.00mm_FKS2_FKP2_MKS2_MKP2 | C22, C23, C24, C25 |
| 2 | 220UF 220uF | CP_Radial_D5.0mm_P2.00mm | C44, C45 |
| 1 | 220K 220k | R_Axial_DIN0204_L3.6mm_D1.6mm_P7.62mm_Horizontal | R1 |
| 1 | 10 | R_Axial_DIN0204_L3.6mm_D1.6mm_P7.62mm_Horizontal | R2 |
| 3 | 1K5 1k5 | R_Axial_DIN0204_L3.6mm_D1.6mm_P7.62mm_Horizontal | R3, R7, R8 |
| 1 | 100K 100k | R_Axial_DIN0204_L3.6mm_D1.6mm_P7.62mm_Horizontal | R4 |
| 1 | 33 | R_Axial_DIN0204_L3.6mm_D1.6mm_P7.62mm_Horizontal | R5 |
| 1 | 1k | R_Axial_DIN0204_L3.6mm_D1.6mm_P7.62mm_Horizontal | R6 |
| 1 | 470 | R_Axial_DIN0204_L3.6mm_D1.6mm_P7.62mm_Horizontal | R9 |
| 2 | 10K 10k | R_Axial_DIN0204_L3.6mm_D1.6mm_P7.62mm_Horizontal | R10, R11 |
| 1 | 10K 10k | R_Array_SIP5 | RN1 |
| 1 | 10K 10k | R_Array_SIP9 | RN2 |
| 1 | 10K 10k | R_Array_SIP8 | RN3 |
SBC 8080 ECB design files
The KiCad project lives in the sladek/SBC_8080_ECB repository on GitHub; these links point at the commit this page was built from.
SBC 8080 ECB: common questions
How big is the SBC 8080 ECB PCB?
The SBC 8080 ECB measures 160.5 × 100.2 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the SBC 8080 ECB?
111 components, from 64 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.
Where can I download the SBC 8080 ECB design files?
From the sladek/SBC_8080_ECB repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.
Can I use the SBC 8080 ECB design in my own project?
The repository has no license, so all rights stay with sladek. Use it as a reference, and ask the author before reusing the design.
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