M48T08
M48T08Y, M48T18
5 V, 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
■
Typical clock accuracy of ±1 minute a month, at
25 °C
■
Automatic power-fail chip deselect and WRITE
protection
■
WRITE protect
VPFD = power-fail deselect voltage):
– M48T08: VCC = 4.75 to 5.5 V;
4.5 V ≤ VPFD ≤ 4.75 V
– M48T18/T08Y: VCC = 4.5 to 5.5 V;
4.2 V ≤ VPFD ≤ 4.5 V
■
Software controlled clock calibration for high
accuracy applications
■
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 top which contains the battery and
crystal
■
■
28
1
PCDIP28
battery/crystal
CAPHAT™
Pin and function compatible with DS1643 and
JEDEC standard 8 K x 8 SRAMs
SNAPHAT®
battery/crystal
28
1
SOH28
RoHS compliant
– Lead-free second level interconnect
June 2011
Doc ID 2411 Rev 11
1/31
www.st.com
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