M41T256YMT7 查看數據表（PDF） - STMicroelectronics

零件编号

产品描述 (功能)

生产厂家

M41T256YMT7

256 Kbit (32K x8) Serial RTC

STMicroelectronics 

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

44

1

SO44 (MT)

Figure 2. 44-pin SOIC Package

SNAPHAT (SH)

Crystal/Battery

44

1

SOH44 (MH)

June 2004

1/27

Share Link: