3.3V-5V TIMEKEEPER CONTROLLER
M48T201Y M48T201V
5.0 or 3.3 V TIMEKEEPER® supervisor
Features
■ Converts low power SRAM into NVRAMs
■ Year 2000 compli...
Description
M48T201Y M48T201V
5.0 or 3.3 V TIMEKEEPER® supervisor
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 5.5 V 4.1V ≤ VPFD ≤ 4.5 V – M48T201V: VCC = 3.0 to 3.6 V 2.7 V ≤ VPFD ≤ 3.0 V
■ Microprocessor power-on reset (valid even during battery backup 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
SNAPHAT® (SH) crystal/battery
44 1
SOH44 (MH) 44-pin SOIC
March 2009
Rev 7
1/37
www.st.com
1
Contents
Contents
M48T201Y, M48T201V
1 Description . . . . . . . . . . . ...
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