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M48T37Y-70MH1TR Datasheet(PDF) 1 Page - STMicroelectronics

Part # M48T37Y-70MH1TR
Description  3.3V-5V 256 Kbit 32Kb x8 TIMEKEEPER SRAM
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

M48T37Y-70MH1TR Datasheet(HTML) 1 Page - STMicroelectronics

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February 2006
M48T37Y
M48T37V
5.0 or 3.3V, 256 Kbit (32 Kbit x8) TIMEKEEPER® SRAM
Rev 6.0
FEATURES SUMMARY
■
INTEGRATED ULTRA-LOW POWER SRAM,
REAL TIME CLOCK, POWER-FAIL
CONTROL CIRCUIT, AND BATTERY
■
FREQUENCY TEST OUTPUT FOR REAL
TIME CLOCK SOFTWARE CALIBRATION
■
YEAR 2000 COMPLIANT
■
AUTOMATIC POWER-FAIL CHIP
DESELECT and WRITE PROTECTION
■
WATCHDOG TIMER
■
WRITE PROTECT VOLTAGE
(VPFD = Power-Fail Deselect Voltage):
–
M48T37Y: VCC = 4.5 to 5.5V
4.2V
≤ VPFD ≤ 4.5V
–
M48T37V: VCC = 3.0 to 3.6V
2.7V
≤ VPFD ≤ 3.0V
■
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 back-up mode)
■
PROGRAMMABLE ALARM OUTPUT
ACTIVE IN THE BATTERY BACK-UP MODE
■
BATTERY LOW FLAG
■
RoHS COMPLIANCE
Lead-free components are compliant with the
RoHS directive.
Figure 1. Package
44
1
SNAPHAT (SH)
Battery/Crystal
SOH44 (MH)
44-pin SOIC


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