M48T201Y_09 Datasheet, PDF (1/37 Pages) STMicroelectronics – 5.0 or 3.3 V TIMEKEEPER® supervisor

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
(V_PFD = power-fail deselect voltage):
– M48T201Y: V_CC = 4.5 to 5.5 V
4.1V ≤ V_PFD ≤ 4.5 V
– M48T201V: V_CC = 3.0 to 3.6 V
2.7 V ≤ V_PFD ≤ 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
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