M48T35AV_07 Datasheet, PDF (1/28 Pages) STMicroelectronics – 3.3V, 256Kbit (32Kbit x 8) TIMEKEEPER® SRAM

M48T35AV
3.3V, 256Kbit (32Kbit x 8) TIMEKEEPER^® SRAM
Features
■ 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
(V_PFD = Power-fail deselect voltage):
– M48T35AY: V_CC = 4.5 to 5.5V
4.2V ≤ V_PFD ≤ 4.5V
– M48T35AV: V_CC = 3.0 to 3.6V
2.7V ≤ V_PFD ≤ 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 32Kbit x 8 SRAMs
■ RoHS compliant
– Lead-free second level interconnect
28
1
PCDIP28 (PC)
battery/crystal
CAPHAT
SNAPHAT (SH)
battery/crystal
28
1
SOH28 (MH)
November 2007
Rev 6
1/28
www.st.com
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