M48T37V Series

5.0 or 3.3 V, 256 Kbit (32 Kbit x 8) TIMEKEEPER® SRAM

Catalog

5.0 or 3.3 V, 256 Kbit (32 Kbit x 8) TIMEKEEPER® SRAM

Part	Current - Timekeeping (Max)	Supplier Device Package	Time Format	Interface	Operating Temperature [Max]	Operating Temperature [Min]	Voltage - Supply [Max]	Voltage - Supply [Min]	Type	Mounting Type	Package / Case	Package / Case	Features
STMicroelectronics M48T37V-10MH6E	2 mA	44-SOH	HH:MM:SS (24 hr)	Parallel	85 °C	-40 °C	3.6 V	3 V	Clock/Calendar	Surface Mount	0.337 in 8.56 mm	44-BSOP	Alarm Leap Year Watchdog Timer
STMicroelectronics M48T37V-10MH1E	2 mA	44-SOH	HH:MM:SS (24 hr)	Parallel	70 °C	0 °C	3.6 V	3 V	Clock/Calendar	Surface Mount	0.337 in 8.56 mm	44-BSOP	Alarm Leap Year Watchdog Timer
STMicroelectronics M48T37Y-70MH1E	3 mA	44-SOH	HH:MM:SS (24 hr)	Parallel	70 °C	0 °C	5.5 V	4.5 V	Clock/Calendar	Surface Mount	0.337 in 8.56 mm	44-BSOP	Alarm Leap Year Watchdog Timer
STMicroelectronics M48T37V-10MH1F	2 mA	44-SOH	HH:MM:SS (24 hr)	Parallel	70 °C	0 °C	3.6 V	3 V	Clock/Calendar	Surface Mount	0.337 in 8.56 mm	44-BSOP	Alarm Leap Year Watchdog Timer

Catalog

5.0 or 3.3 V, 256 Kbit (32 Kbit x 8) TIMEKEEPER® SRAM

Key Features

• WRITE protect voltage (V= 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

Description

The M48T37Y/V TIMEKEEPER®RAM is a 32 Kb x 8 non-volatile static RAM and real-time clock. The monolithic chip is available in a special package which provides a highly integrated battery-backed memory and real-time clock solution. The 44-lead, 330 mil SOIC package provides sockets with gold-plated contacts at both ends for direct connection to a separate SNAPHAT housing containing the battery and crystal. The unique design allows the SNAPHAT®battery/crystal package to be mounted on top of the SOIC package after the completion of the surface mount process. Insertion of the SNAPHAT housing after reflow prevents potential battery and crystal damage due to the high temperatures required for device surface-mounting. The SNAPHAT housing is keyed to prevent reverse insertion. The SOIC and battery packages are shipped separately in plastic anti-static tubes or in tape & reel form. For the 44-lead SOIC, the battery/crystal package (e.g., SNAPHAT) part number is "M4T28-BR12SH" or "M4T32-BR12SH".