M48T248Y and M48T248V are 5.0 or 3.3V, 1024K TIMEKEEPER® SRAM with PHANTOM features. They have a 5.0V or 3.3V operating voltage, real-time clock, automatic leap year correction function, automatic switching and deselect circuit, choice of power-fail deselect voltages, full 10% VCC operating range, over 10 years of data retention in the absence of power, watch function is transparent to RAM operation, and 128K x 8 NV SRAM directly replaces volatile static RAM or EEPROM.
The document describes the M48T248Y and M48T248V Timekeeper SRAM modules from STMicroelectronics. These devices are 128K x 8 bit non-volatile static RAMs that integrate a real-time clock (RTC) and a self-contained battery backup in a single 32-pin DIP package.
| Memory Capacity | 128K x 8 bits |
|---|---|
| Operating Voltage (M48T248Y) | 4.5 to 5.5V |
| Operating Temperature | 0 to 70°C |
| Package Type | 32-pin DIP |
Yes, it includes automatic leap year correction valid up to the year 2100.
The power-fail deselect voltage (VpFD) for M48T248Y is between 4.25V and 4.50V.
The power-fail deselect voltage (VpFD) for M48T248V is between 2.80V and 2.97V.