M48T35Y Datasheet, PDF (1/28 Pages) STMicroelectronics – 5 V, 256 Kbit (32 Kb x 8) TIMEKEEPER® SRAM

M48T35
M48T35Y
5 V, 256 Kbit (32 Kb 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
■ Frequency test output for real-time clock
■ Automatic power-fail chip deselect and WRITE
protection
■ WRITE protect voltages
V_PFD = power-fail deselect voltage):
– M48T35: V_CC = 4.75 to 5.5 V;
4.5 V ≤ V_PFD ≤ 4.75 V
– M48T35Y: V_CC = 4.5 to 5.5 V;
4.2 V ≤ V_PFD ≤ 4.5 V
■ 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 32 Kb x 8 SRAMs
■ RoHS compliant
– Lead-free second level interconnect
28
1
PCDIP28
Battery/crystal
CAPHAT™
SNAPHAT^®
Battery/crystal
28
1
SOH28
June 2011
Doc ID 2611 Rev 10
1/28
www.st.com
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