M48T02 M48T12 is a 16Kbit SRAM real-time clock with features of low power, high accuracy, and automatic calibration.
The M48T02/12 TIMEKEEPER® RAM is a 2Kb x8 non-volatile static RAM and real-time clock that integrates silicon with a quartz crystal and a long-life lithium button cell in a single CAPHAT™ DIP package. It provides byte-wide clock access, BCD-coded timekeeping (year, month, day, date, hours, minutes, seconds), and automatic power-fail chip deselect.
| Memory Capacity | 2Kb x8 |
|---|---|
| Operating Temperature Range | 0 to 70 °C |
| Storage Temperature Range | -40 to 85 °C |
| Supply Voltage (M48T02) | 4.75V to 5.5V |
| Supply Voltage (M48T12) | 4.5V to 5.5V |
| Power-fail Deselect Voltage (M48T02) | 4.5V to 4.75V |
| Power-fail Deselect Voltage (M48T12) | 4.2V to 4.5V |
| Battery Back-up Switchover Voltage | 3.0V |
| Expected Data Retention Time | 10 YEARS |
The typical clock accuracy is +1 minute per month at 25°C.
The button cell maintains data and clock function for at least 10 years in the absence of power.
Yes, it is pin and functionally equivalent to any JEDEC standard 2Kb x8 SRAM.