STMicroelectronics M48T37V-10MH1F

Description
The STFeaturesM48T37YM48T37V5.0 or 3.3 V, 256 Kbit (32 Kbit x 8) TIMEKEEPER® SRAM is an integrated ultra low power SRAM, real-time clock, power-fail control circuit, and battery. It features a frequency test output for real-time clock software calibration, automatic power-fail chip deselect and WRITE protection, and a watchdog timer. The WRITE protect voltage (VPFD Power-fail deselect voltage) is 4.2 V ≤ VPFD ≤ 4.5 V for M48T37Y (Vcc = 4.5 to 5.5 V) and 2.7 VS VPFD ≤ 3.0 V for M48T37V (Vcc = 3.0 to 3.6 V).

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 VS 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
RoHS compliant
Lead-free second level interconnect

Applications
Timekeeping and date stamping
Real-time clock applications
Battery backup applications
Microprocessor power-on reset
Programmable alarm output
Battery low flag