M48T35AY
M48T35AV
5.0 or 3.3V, 256 Kbit (32 Kb x8) TIMEKEEPER® SRAM
FEATURES SUMMARY
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INTEGRATED, ULTRA LOW POWER SRAM,
REAL TIME CLOCK, POWER-FAIL
CONTROL CIRCUIT AND BATTERY
BYTEWIDE™ RAM-LIKE CLOCK ACCESS
BCD CODED YEAR, MONTH, DAY, DATE,
HOURS, MINUTES, AND SECONDS
BATTERY LOW FLAG (BOK)
FREQUENCY TEST OUTPUT FOR REAL
TIME CLOCK
AUTOMATIC POWER-FAIL CHIP
DESELECT AND WRITE PROTECTION
WRITE PROTECT VOLTAGES
(VPFD = Power-fail Deselect Voltage):
– M48T35AY: VCC = 4.5 to 5.5V
4.2V ≤ VPFD ≤ 4.5V
– M48T35AV: VCC = 3.0 to 3.6V
2.7V ≤ VPFD ≤ 3.0V
SELF-CONTAINED BATTERY AND
CRYSTAL IN THE CAPHAT™ DIP
PACKAGE
SOIC PACKAGE PROVIDES DIRECT
CONNECTION FOR A SNAPHAT®
HOUSING CONTAINING THE BATTERY
AND CRYSTAL
SNAPHAT® HOUSING (BATTERY AND
CRYSTAL) IS REPLACEABLE
PIN AND FUNCTION COMPATIBLE WITH
JEDEC STANDARD 32Kb x8 SRAMs
Figure 1. 28-pin, PCDIP CAPHAT™ Package
28
1
PCDIP28 (PC)
Battery/Crystal
CAPHAT
Figure 2. 28-pin SOIC Package
SNAPHAT (SH)
Battery/Crystal
28
1
SOH28 (MH)
April 2004
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