C64 250407 SRAM Adapter
hkzlab·C64_250407_SRAM_Adapter
About the C64 250407 SRAM Adapter PCB
C64 250407 SRAM Adapter is an open source PCB design by hkzlab, published on GitHub under the CC-BY-NC-4.0 license. It is a 2-layer board measuring 53.3 × 59.7 mm, with 21 components from 19 distinct parts.
Other key parts include the 74HCT32, 74HCT573, 128K x 8 SRAM and 628128_DIP32_SSOP32. By type, the board carries 10 connectors, 6 ICs and 5 capacitors.
It belongs with the retro computing designs in this gallery.
From the project
SRAM Adapter for the C64 250407 board
Any use of this project is under your own responsibility. You will be responsible of checking the correct construction and functionality of your board. By using this project You will agree that I cannot be held responsible if it will destroy any of your devices, damage your computer, burn down your house or whatever.
WARNING: This is compatible with the 250407 board only!!!

Main components on the C64 250407 SRAM Adapter
C64 250407 SRAM Adapter bill of materials (BOM)
21 components, 19 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | 74HCT32 | DIP-14_W7.62mm | U1 |
| 1 | 74HCT573 | DIP-20_W7.62mm | U2 |
| 1 | 128K x 8 SRAM | DIP-32_W15.24mm | U3 |
| 1 | 74HCT573 | TSSOP-20_4.4x6.5mm_P0.65mm | U4 |
| 1 | 74HCT32 | SO-14_3.9x8.65mm_P1.27mm | U5 |
| 1 | 628128_DIP32_SSOP32 | SOP-32_11.305x20.495mm_P1.27mm | U6 |
| 1 | TL_DRAM | PinHeader_1x08_P2.54mm_Vertical | J1 |
| 1 | TR_DRAM | PinHeader_1x08_P2.54mm_Vertical | J2 |
| 1 | BL_DRAM | PinHeader_1x08_P2.54mm_Vertical | J3 |
| 1 | BR_DRAM | PinHeader_1x08_P2.54mm_Vertical | J4 |
| 1 | T_01 | PinHeader_1x01_P2.54mm_Vertical | J5 |
| 1 | T_02 | PinHeader_1x01_P2.54mm_Vertical | J6 |
| 1 | T_03 | PinHeader_1x02_P2.54mm_Vertical | J7 |
| 1 | B_01 | PinHeader_1x01_P2.54mm_Vertical | J8 |
| 1 | B_02 | PinHeader_1x01_P2.54mm_Vertical | J9 |
| 1 | B_03 | PinHeader_1x01_P2.54mm_Vertical | J10 |
| 3 | 100nF | C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C1, C2, C3 |
| 1 | 82pF-820pF | C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C4 |
| 1 | 82pF-820pF | C_Disc_D3.0mm_W2.0mm_P2.50mm | C5 |
C64 250407 SRAM Adapter design files
The KiCad project lives in the hkzlab/C64_250407_SRAM_Adapter repository on GitHub; these links point at the commit this page was built from.
C64 250407 SRAM Adapter: common questions
How big is the C64 250407 SRAM Adapter PCB?
The C64 250407 SRAM Adapter measures 53.3 × 59.7 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the C64 250407 SRAM Adapter?
21 components, from 19 distinct parts. The full bill of materials is listed on this page.
Where can I download the C64 250407 SRAM Adapter design files?
From the hkzlab/C64_250407_SRAM_Adapter repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the C64 250407 SRAM Adapter design in my own project?
It is published under CC-BY-NC-4.0, which limits how it may be reused; read the license before building on it.
Similar boards
OpenTendo
Redherring32
196.3 × 118.7 mm93 parts2LTAPR-OHL-1.0850MCL86jr
MicroCoreLabs
56.1 × 57.1 mm66 parts4LNo license53224pin flex interposer
Wren6991
29 × 32 mm3 parts2LNo license508Sram dev board
Wren6991
50 × 50 mm12 parts2LNo license508TRS-80 Color Computer 3
baldengineer
280 × 155.3 mm204 parts2LCC-BY-4.0442Commodore Plus 4
baldengineer
284.7 × 158.9 mm212 parts2LCC-BY-4.0442