MemExpansion
About the MemExpansion PCB
MemExpansion is an open source PCB design by ja1umi, published on GitHub under the MIT license. It is a 2-layer board measuring 155 × 114 mm, with 27 components from 12 distinct parts.
Other key parts include the 74HCT273, GAL16V8, TBD62083A, GAL22V10 and AT28C256. By type, the board carries 7 diodes, 7 resistors, 6 ICs, 6 capacitors and 1 connector.
From the project
Various design materials for building my 8-bit-microprocessor-based single board computer(s)
MUTIF09 (or shortly MUTIF) project is my hobby project for developent of tiny homebrew computers and their add-on/expansion boards (e.g. Arithmetic coprocessor and I/O expansion board) simple enough for building and maintenance, focusing on around 1980s-era microprocessors (e.g. Motorola's MC6809, Harris' HD-6120) just for fun.
Updates are available when they are released.
Main components on the MemExpansion
MemExpansion bill of materials (BOM)
27 components, 12 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | 74HCT273 | DIP-20_W7.62mm | U1 |
| 1 | GAL16V8 | DIP-20_W7.62mm | U2 |
| 1 | TBD62083A | DIP-18_W7.62mm | U3 |
| 1 | GAL22V10 | DIP-24_W7.62mm | U4 |
| 1 | AT28C256 | DIP-28_W15.24mm | U5 |
| 1 | AS6C1008 | DIP-32_W15.24mm | U6 |
| 1 | Conn_02x20_Odd_Even | Pin_Header_Straight_2x20_Pitch2.54mm | J1 |
| 4 | LED_G | LED_D5.0mm | D1, D2, D3, D4 |
| 3 | LED_Y | LED_D5.0mm | D5, D6, D7 |
| 5 | 0.1u | C_Disc_D5.0mm_W2.5mm_P5.00mm | C1, C2, C3, C4, C5 |
| 1 | 10u | CP_Radial_D5.0mm_P2.50mm | C6 |
| 7 | 1k | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R1, R2, R3, R4, R5, R6, R7 |
MemExpansion design files
The KiCad project lives in the ja1umi/MUTIF09Project repository on GitHub; these links point at the commit this page was built from.
MemExpansion: common questions
How big is the MemExpansion PCB?
The MemExpansion measures 155 × 114 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the MemExpansion?
27 components, from 12 distinct parts. The full bill of materials is listed on this page.
Where can I download the MemExpansion design files?
From the ja1umi/MUTIF09Project repository on GitHub, which has the KiCad layout; the links under Design files point to each one.
Can I use the MemExpansion design in my own project?
Yes, under the terms of its MIT license, which ja1umi chose for the repository.
