MC5 RAM Module
author: bradleyb
4 layer board of 1.90 x 0.93 inches (48.3 x 23.7 mm)
Uploaded:
November 11, 2026
Shared:
November 11, 2026
Total Price:
$17.70
Designed to hold one or two 128KB SRAM chips
U1, U2: 128KB SRAM chip, i.e. SRM20100LLM-10. For single chip, omit U2, R2, D4.
D1: not sure. Appears to be marked “800”
D2, D3, D4: MELF diode, Schottky, 20V reverse voltage
C1, C2: 1206 MLCC capacitor, 100nF
R1, R2: 1206 resistor, 100k
BATT1: 3V coin cell, i.e. CR1220. Original battery holder is integrated into the module’s plastic housing
The female connectors are just regular “dupont” style crimp terminals, repurposed. Use the housing from an existing MC5 ROM module as a jig to keep them in place when soldering.
Designed to hold one or two 128KB SRAM chips
U1, U2: 128KB SRAM chip, i.e. SRM20100LLM-10. For single chip, omit U2, R2, D4.
D1: not sure. Appears to be marked “800”
D2, D3, D4: MELF diode, Schottky, 20V reverse voltage
C1, C2: 1206 MLCC capacitor, 100nF
R1, R2: 1206 resistor, 100k
BATT1: 3V coin cell, i.e. CR1220. Original battery holder is integrated into the module’s plastic housing
The female connectors are just regular “dupont” style crimp terminals, repurposed. Use the housing from an existing MC5 ROM module as a jig to keep them in place when soldering.
