M48T02 M48T12 5.0 V, 16 Kbit (2 Kb x 8) TIMEKEEPER.
M48T129Y - 1Mbit (128 Kbit x 8) TIMEKEEPER SRAM
M48T12 - 16Kbit (2 Kb x 8) TIMEKEEPER SRAM
M48T128V - 1 Mbit (128 Kb x 8) TIMEKEEPER SRAM
M48T128Y - 1-Mbit SRAM
M48T129V - 1Mbit (128 Kbit x 8) TIMEKEEPER SRAM