M41ST85Y

M41ST85Y M41ST85W 5.0 OR 3.0V, 512 bit (64 x 8) SERIAL RTC and NVRAM SUPERVISOR FEATURES SUMMARY s 5.0 OR 3.0V OPERATING VOLTAGE s SERIAL INTERFACE SUPPORTS I2C BUS (400 KHz) s NVRAM SUPERVISOR FOR EXTERNAL LPSRAM s OPTIMIZED FOR MINIMAL INTERCONNECT TO MCU s 2.5 TO 5.5V OSCILLATOR OPERATING VOLTAGE s AUTOMATIC SWITCH-OVER and DESELECT CIRCUITRY s CHOICE OF POWER-FAIL DESELECT VOLTAGES – M41ST85Y: VCC = 4.5 to 5.5V; 4.20V ≤ VPFD ≤ 4.50V – M41ST85W: VCC = 2.7 to 3.6V; 2.55V ≤ VPFD ≤ 2.70V s 1.25V REFERENCE (for PFI/PFO) s COUNTERS FOR TENTHS/HUNDREDTHS OF SECONDS, SECONDS, MINUTES, HOURS, DAY, DATE, MONTH, YEAR, and CENTURY s 44 BYTES OF GENERAL PURPOSE RAM s PROGRAMMABLE ALARM and INTERRUPT FUNCTION (VALID EVEN DURING BATTERY BACK-UP MODE) s WATCHDOG TIMER s MICROPROCESSOR POWER-ON RESET s BATTERY LOW FLAG s POWER-DOWN TIMESTAMP (HT BIT) s ULTRA-LOW BATTERY SUPPLY CURRENT OF 500nA (MAX) s PACKAGING INCLUDES A 28-LEAD SOIC and SNAPHAT® TOP (to be Ordered Separately) s SOI...