M48T37Y Datasheet | STMicroelectronics

Features - Integrated ultra low power SRAM, real-time clock, power-fail control circuit, and battery - Frequency test output for real-time clock software calibration - Automatic power-fail chip deselect and WRITE protection - Watchdog timer - WRITE protect voltage (VPFD = Power-fail deselect voltage): - M48T37Y: VCC = 4.5 to 5.5 V 4.2 V ≤ VPFD ≤ 4.5 V - M48T37V: VCC = 3.0 to 3.6 V 2.7 V ≤ VPFD ≤ 3.0 V - 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 - Microprocessor power-on reset (valid even during battery backup mode) - Programmable alarm output active in the battery backup mode - Battery low flag - Ro HS pliant - Lead-free second level interconnect SNAPHAT® (SH) Battery/crystal 44 1 SOH44 (MH) 44-pin SOIC August 2010 Doc ID 7019 Rev...