M48T129Y
M48T129Y is 1Mbit (128 Kbit x 8) TIMEKEEPER SRAM manufactured by STMicroelectronics.
Features
- Integrated, ultra low power SRAM, real-time clock, power-fail control circuit, battery, and crystal
)- BCD coded century, year, month, day, date, t(shours, minutes, and seconds c- Battery low warning flag du- Automatic power-fail chip deselect and WRITE roprotection P- Two WRITE protect voltages: te(VPFD = power-fail deselect voltage) le- M48T129Y: VCC = 4.5 to 5.5 V;
4.2 V ≤ VPFD ≤ 4.5 V so- M48T129V: VCC = 3.0 to 3.6 V; b2.7 V ≤ VPFD ≤ 3.0 V O- Conventional SRAM operation; unlimited -WRITE cycles t(s)- Software controlled clock calibration for high accuracy applications uc- 10 years of data retention and clock operation din the absence of power ro- Self-contained battery and crystal in DIP Ppackage te- Microprocessor power-on reset le(valid even during battery backup mode) so- Programmable alarm output active in battery Obbackup...
