STMicroelectronics M48T129Y-70PM1

Description
The STM48T129YM48T129V is an integrated, ultra-low power SRAM with a real-time clock, power-fail control circuit, battery, and crystal. It is Year 2000 compliant and features BCD-coded century, year, month, day, date, hours, minutes, and seconds.

Features
Integrated SRAM, real-time clock, power-fail control circuit, battery, and crystal
Year 2000 compliant
BCD-coded century, year, month, day, date, hours, minutes, and seconds
Battery low warning flag
Automatic power-fail chip deselect and write protection
Two write protect voltages
Conventional SRAM operation with unlimited write cycles
Software-controlled clock calibration for high accuracy
10 years of data retention and clock operation in the absence of power
Self-contained battery and crystal in DIP package
Microprocessor power-on reset (valid even during battery back-up mode)
Programmable alarm output active in battery back-up mode
SOIC package provides direct connection for a SNAPHAT top containing the battery and crystal
SNAPHAT housing (battery/crystal) is replaceable
Equivalent surface-mount (SMT) solution requires a 44-pin M48T201Y/V and a stand-alone 128K x8 LPSRAM (SNAPHAT® Top to be ordered separately)

Applications
Timekeeping and data logging
Industrial control and automation
Medical devices
Security systems
Consumer electronics