M48T128Y_10 Datasheet, PDF (1/23 Pages) STMicroelectronics – 5.0 or 3.3 V, 1 Mbit (128 Kb x 8) TIMEKEEPER® SRAM

M48T128Y
M48T128V
5.0 or 3.3 V, 1 Mbit (128 Kb x 8) TIMEKEEPER^® SRAM
Features
■ Integrated, ultra low power SRAM, real-time
clock, power-fail control circuit, battery, and
crystal
■ BCD coded year, month, day, date, hours,
minutes, and seconds
■ Automatic power-fail chip deselect and WRITE
protection
■ WRITE protect voltages
(V_PFD = power-fail deselect voltage):
– M48T128Y: V_CC = 4.5 to 5.5 V
4.1 V ≤ V_PFD ≤ 4.5 V
– M48T128V: V_CC = 3.0 to 3.6 V
2.7 V ≤ V_PFD ≤ 3.0 V
(contact the ST sales office for availability)
■ Conventional SRAM operation; unlimited
WRITE cycles
■ Software-controlled clock calibration for high
accuracy applications
■ 10 years of data retention and clock operation
in the absence of power
■ Self-contained battery and crystal in the DIP
package
■ Pin and function compatible with JEDEC
standard 128 K x 8 SRAMs
■ RoHS compliant
– Lead-free second level interconnect
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PMDIP32 module (PM)
June 2010
Doc ID 5746 Rev 6
1/23
www.st.com
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