MaxRAM
About the MaxRAM PCB
MaxRAM is an open source PCB design by fordp2002, published on GitHub under the GPL-2.0 license. It is a 2-layer board measuring 76.2 × 43.2 mm, with 15 components from 10 distinct parts.
Other key parts include the AS6C4008-55SIN, SST39SF040, ATF1502PLCC44 and DS1210. By type, the board carries 7 connectors, 4 ICs and 4 capacitors.
From the project
Open Hardware BBC RAM/ROM Board
My current thoughts are a board that covers the BBCs 4 sideways ROM sockets and has the following features: 1 4 MBit (512KB) 32 Pin DIP Flash Chip (Socketed) [Microchip Technology SST39SF040-70-4C-PHE] 1 4 Mbit (512KB) SRAM Chip [Alliance Memory, Inc. AS6C4008-55PCN] 1 PLD to handle the logic [ATF1502ASL-25JU44-ND] 1 Simple diode battery backup circuit and battery connector or maybe an IC [DS1210S+TRL-ND] for Battery Backup.
Main components on the MaxRAM
MaxRAM bill of materials (BOM)
15 components, 10 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | AS6C4008-55SIN | DIP-32_W15.24mm_LongPads | U1 |
| 1 | SST39SF040 | DIP-32_W15.24mm_LongPads | U2 |
| 1 | ATF1502PLCC44 | PLCC44 | U3 |
| 1 | DS1210 | DIP-8_W7.62mm | U4 |
| 2 | CONN_01X14 | Pin_Header_Straight_1x14_Pitch2.54mm | J1, J6 |
| 1 | CONN_02X05 | Pin_Header_Angled_2x05_Pitch2.54mm | J3 |
| 2 | GS3 | GS3 | J4, J5 |
| 1 | CONN_01X02 | Pin_Header_Straight_1x02_Pitch2.54mm | J7 |
| 1 | CONN_01X08 | Pin_Header_Straight_1x08_Pitch2.54mm | J8 |
| 4 | C | C_0805_HandSoldering | C1, C2, C3, C4 |
MaxRAM design files
The KiCad project lives in the fordp2002/MaxRAM repository on GitHub; these links point at the commit this page was built from.
- LayoutPCB/MaxRam.kicad_pcb
MaxRAM: common questions
How big is the MaxRAM PCB?
The MaxRAM measures 76.2 × 43.2 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the MaxRAM?
15 components, from 10 distinct parts. The full bill of materials is listed on this page.
Where can I download the MaxRAM design files?
From the fordp2002/MaxRAM repository on GitHub, which has the KiCad layout; the links under Design files point to each one.
Can I use the MaxRAM design in my own project?
Yes, under the terms of its GPL-2.0 license, which fordp2002 chose for the repository.