M48T58_07 Datasheet, PDF (1/31 Pages) STMicroelectronics – 5.0V, 64 Kbit (8 Kb x 8) TIMEKEEPER SRAM

M48T58
M48T58Y
5.0V, 64 Kbit (8 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):
– M48T58: V_CC = 4.75 to 5.5V
4.5V ≤ V_PFD ≤ 4.75V
– M48T58Y: V_CC = 4.5 to 5.5V
4.2V ≤ V_PFD ≤ 4.5V
■ Self-contained battery and crystal in the
CAPHAT™ dip package
■ Packaging includes a 28-lead SOIC and
SNAPHAT^® top (to be ordered separately)
■ SOIC package provides direct connection for a
snaphat housing containing the battery and
crystal
■ Pin and function compatible with JEDEC
standard 8 Kb x8 SRAMs
■ RoHS compliant
– Lead-free second level interconnect
28
1
PCDIP28 (PC)
Battery/Crystal
CAPHAT
SNAPHAT (SH)
Battery/Crystal
28
1
SOH28 (MH)
August 2007
Rev 5
1/31
www.st.com
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