64 Kbit (8 Kb x 8) TIMEKEEPER SRAM
M48T59 M48T59Y/M48T59V
64 Kbit (8Kb x8) TIMEKEEPER® SRAM
PRELIMINARY DATA
s INTEGRATED ULTRA LOW POWER SRAM, REAL TIME...
Description
M48T59 M48T59Y/M48T59V
64 Kbit (8Kb x8) TIMEKEEPER® SRAM
PRELIMINARY DATA
s INTEGRATED ULTRA LOW POWER SRAM, REAL TIME CLOCK, POWER-FAIL CONTROL CIRCUIT and BATTERY
s FREQUENCY TEST OUTPUT for REAL TIME CLOCK SOFTWARE CALIBRATION
s AUTOMATIC POWER-FAIL CHIP DESELECT and WRITE PROTECTION
s WRITE PROTECT VOLTAGES (VPFD = Power-fail Deselect Voltage): – M48T59: 4.5V ≤ VPFD ≤ 4.75V – M48T59Y: 4.2V ≤ VPFD ≤ 4.5V – M48T59V: 2.7V ≤ VPFD ≤ 3.0V
s SELF-CONTAINED BATTERY and CRYSTAL in the CAPHAT DIP PACKAGE
s PACKAGING INCLUDES a 28-LEAD SOIC and SNAPHAT® TOP (to be Ordered Separately)
s SOIC PACKAGE PROVIDES DIRECT CONNECTION for a SNAPHAT TOP which CONTAINS the BATTERY and CRYSTAL
s MICROPROCESSOR POWER-ON RESET (Valid even during battery back-up mode)
s PROGRAMMABLE ALARM OUTPUT ACTIVE in the BATTERY BACK-UP MODE
s BATTERY LOW FLAG
Table 1. Signal Names
A0-A12
Address Inputs
DQ0-DQ7
Data Inputs / Outputs
IRQ/FT
Interrupt / Frequency Test Output (Open Drain)
RST
...
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