M48T39Y
M48T39Y is 256Kb (32K x 8) TIMEKEEPER SRAM manufactured by STMicroelectronics.
256 Kb (32K x8) TIMEKEEPER® SRAM
PRELIMINARY DATA s INTEGRATED ULTRA LOW POWER SRAM, REAL TIME CLOCK, POWER-FAIL CONTROL CIRCUIT, BATTERY and CRYSTAL s BCD CODED YEAR, MONTH, DAY, DATE, HOURS, MINUTES and SECONDS s AUTOMATIC POWER-FAIL CHIP DESELECT and WRITE PROTECTION s WRITE PROTECT VOLTAGE (VPFD = Power-fail Deselect Voltage):
- M48T39Y: 4.20V ≤ VPFD ≤ 4.50V s PROGRAMMABLE INTERRUPTS and SQUARE WAVE OUTPUT s WATCHDOG TIMER RESTARTS on OUT-OF-CONTROL PROCESSOR s CLOCK ACCURACY IS BETTER THAN ±1 MINUTE per MONTH at 25°C s 10 YEARS of DATA RETENTION and CLOCK OPERATION in the ABSENCE of POWER s SELF-CONTAINED BATTERY and CRYSTAL in DIP PACKAGE s PROGRAMMABLE ALARM OUTPUT ACTIVE...
