M48T35
M48T35Y
5V, 256 Kbit (32 Kb x 8) TIMEKEEPER
®
SRAM
Features
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■
■
■
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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
28
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 5.5V
– 4.5V
≤
V
PFD
≤
4.75V
– M48T35Y: V
CC
= 4.5 to 5.5V
– 4.2V
≤
V
PFD
≤
4.5V
1
PCDIP28 (PC)
Battery/Crystal
CAPHAT
SNAPHAT (SH)
Battery/Crystal
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■
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
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SOH28 (MH)
August 2007
Rev 7
1/29
www.st.com
1
STMICROELECTRONICS [ STMICROELECTRONICS ]
