4l sram adapter
consp·pcbs·486sram-adapter/4l sram adapter.kicad_pcb
About the 4l sram adapter PCB
4l sram adapter is an open source PCB design by consp, published on GitHub. It is a 4-layer board measuring 9.7 × 41 mm, with 4 components from 4 distinct parts.
By type, the board carries 2 connectors, 1 diode and 1 capacitor.
From the project
PCB's I've designed which can be shared
These files contain an adapter allowing you to use a SOJ32 package SRAM chip on older 486 (and other) motherboards. Some others have been posted on vogons but I could not find any available schematics so I made another one inspired by some of those available on the forum.
This pcb is 4 layered, if you want the 2 layered version contact me. I also have a TSOP version but that one is not finished and untested.

4l sram adapter bill of materials (BOM)
4 components, 4 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | 628128_SRAM_PDIP | SOJ-32 | J1 |
| 1 | 628128_SRAM_PDIP | PDIP-32-Special | J2 |
| 1 | D | D_0603_1608Metric_Pad1.05x0.95mm_HandSolder | D3 |
| 1 | 10nF | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C1 |
4l sram adapter design files
The KiCad project lives in the consp/pcbs repository on GitHub; these links point at the commit this page was built from.
4l sram adapter: common questions
How big is the 4l sram adapter PCB?
The 4l sram adapter measures 9.7 × 41 mm, has 4 copper layers and is 1.6062 mm thick.
How many components are on the 4l sram adapter?
4 components, from 4 distinct parts. The full bill of materials is listed on this page.
Where can I download the 4l sram adapter design files?
From the consp/pcbs repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the 4l sram adapter design in my own project?
The repository has no license, so all rights stay with consp. Use it as a reference, and ask the author before reusing the design.