M48T201Y

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 . . . . . . . . . . . ...