元器件交易网www.1mpi.com

M41T94

Serial real-time clock with 44 bytes NVRAM and reset

Features

■

Counters for tenths/hundredths of seconds, seconds, minutes, hours, day, date, month, year, and century

32KHz crystal oscillator integrating load capacitance (12.5pF) providing exceptional oscillator stability and high crystal series resistance operation

Serial peripheral interface (2MHz SPI)Ultra-low battery supply current of 500nA (max)2.7 to 5.5V operating voltage

2.5 to 5.5V oscillator operating voltageBattery low flag

Automatic switchover and deselect circuitry44 bytes of general purpose RAM

Programmable alarm and interrupt function (valid even during battery back-up mode)Accurate programmable watchdog timer (from 62.5ms to 128s)

Microprocessor power-on resetChoice of power-fail deselect voltages (VCC = 2.7 to 5.5V):

–THS=VSS; 2.55V ≤ VPFD ≤ 2.70V–THS=VCC; 4.20V ≤ VPFD ≤ 4.50VPackaging includes a 28-lead SOIC and

SNAPHAT® top (to be ordered separately) or 16-lead SOIC

28-lead SOIC package provides direct

connection for a SNAPHAT top which contains the battery and crystal

RoHS compliant

–Lead-free second level interconnect

■

■■■■■■■■■■■

■

■

■

November 2007 Rev 51/41

www.1mpi.com