M48T08 M48T18 64 Kbit (8Kb x 8) TIMEKEEPER® SRAM is an integrated ultra low power SRAM, real time clock, power-fail control circuit and battery
The document describes the M48T08 and M48T18 TIMEKEEPER® SRAM, which are 64 Kbit (8K x 8) non-volatile static RAMs featuring an integrated real-time clock. These devices provide byte-wide clock access with BCD coded year, month, day, date, hours, minutes, and seconds.
| Memory Capacity | 64 Kbit (8K x 8) |
|---|---|
| Operating Temperature Range | 0 to 70 °C |
| Supply Voltage (M48T08) | 4.5V to 4.75V |
| Supply Voltage (M48T18) | 4.2V to 4.5V |
| Data Retention Time | 10 YEARS |
| Clock Accuracy | Typical 1 minute per month at 25°C |
The device has an expected data retention time of 10 years.
The device provides a typical clock accuracy of 1 minute per month when operating at 25°C.
The device maintains stored data for an expected retention time of 10 years.