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M41T256YMT7TR Datasheet(PDF) 1 Page - STMicroelectronics |
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M41T256YMT7TR Datasheet(HTML) 1 Page - STMicroelectronics |
1 / 27 page 1/27 June 2004 M41T256Y 256 Kbit (32K x8) Serial RTC FEATURES SUMMARY ■ 5V OPERATING VOLTAGE ■ SERIAL INTERFACE SUPPORTS EXTENDED I2C BUS ADDRESSING (400kHz) ■ AUTOMATIC SWITCH-OVER AND DESELECT CIRCUITRY ■ POWER-FAIL DESELECT VOLTAGES: – M41T256Y: VCC = 4.5 to 5.5V; VPFD = 4.2 < VPFD < 4.5V ■ COUNTERS FOR TENTHS/HUNDREDTHS OF SECONDS, SECONDS, MINUTES, HOURS, DAY, DATE, MONTH, and YEAR ■ PROGRAMMABLE SOFTWARE CLOCK CALIBRATION ■ 32,752 BYTES OF GENERAL PURPOSE RAM ■ MICROPROCESSOR POWER-ON RESET ■ HOLDS MICROPROCESSOR IN RESET UNTIL SUPPLY VOLTAGE REACHES STABLE OPERATING LEVEL ■ AUTOMATIC ADDRESS-INCREMENTING ■ TAMPER INDICATION CIRCUIT WITH TIME- STAMP ■ SLEEP MODE FUNCTION ■ 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 Figure 1. 44-pin, Hatless SOIC Package Figure 2. 44-pin SOIC Package 44 1 SO44 (MT) 44 1 SOH44 (MH) SNAPHAT (SH) Crystal/Battery |
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