HMNR1288D Overview
The HMNR1288D(V) TIMEKEEPER SRAM is a 128Kb x 8 non-volatile static RAM and real time clock organized as 131,072 words by 8 bits. The special DIP package provides a fully integrated battery back-up memory and real time clock solution. The HMNR1288D(V) directly replaces industry standard 128Kbit x 8 SRAMs.
HMNR1288D Key Features
- YEAR 2000 PLIANT
- INTEGRATED LOW POWER SRAM, REAL TIME CLOCK, POWER-FAIL CONTROL CIRCUIT, BATTERY and CRYSTAL
- BCD CODED YEAR, MONTH, DAY, DATE, HOURS, MINUTES, and SECONDS
- AUTOMATIC POWER-FAIL CHIP DESELECT and WRITE PROTECTION VOLTAGES : (VPFD = Power-fail Deselect Voltage)
- HMNR1288D : VCC = 4.5 to 5.5V 4.2V ≤ VPFD ≤ 4.5V
- HMNR1288DV: VCC = 3.0 to 3.6V 2.7V ≤ VPFD ≤ 3.0V
- CONVENTIONAL SRAM OPERATION : UNLIMITED WRITE CYCLES
- SOFTWARE CONTROLLED CLOCK CALIBRATION FOR HIGH ACCURACY
HMNR1288D Applications
- 10 YEARS OF DATA RETENTION and CLOCK OPERATION IN THE ABSENCE OF POWER PIN and FUNCTION PATIBLE WITH INDUSTRY STANDARD 128K x 8 SRAMS