M48T201V-70MH Datasheet - STMicroelectronics

Description
The M48T201Y/V are self-contained devices that include a real time clock (RTC), programmable alarms, a watchdog timer, and a square wave output which provides control of up to 512K x 8 of external low-power static RAM. Access to all RTC functions and the external RAM is the same as conventional bytewide SRAM.

FEATUREs
■ Converts low power SRAM into NVRAMs
■ Year 2000 compliant
■ Battery low flag
■ Integrated real time clock, power-fail control circuit, battery and crystal
■ Watchdog timer
■ Choice of write protect voltages (VPFD = Power-fail Deselect Voltage):
   – M48T201Y: VCC = 4.5 to 5.5V 4.1V ≤ VPFD ≤ 4.5V
   – M48T201V: VCC = 3.0 to 3.6V 2.7V ≤ VPFD ≤ 3.0V
■ Microprocessor power-on reset (valid even during battery back-up mode.)
■ Programmable alarm output active in the battery backed-up mode
■ Packaging includes a 44-lead SOIC and SNAPHAT® top (to be ordered separately)
■ SOIC package provides direct connection for a SNAPHAT® top which contains the battery and crystal
■ RoHS compliant
   – Lead-free second level interconnect