ST M4T28-BR12SH1

锂48mAh2.8 V

Overview

Description The M4TXX-BR12SH SNAPHAT® top is a detachable lithium power source for ST’s nonvolatile TIMEKEEPER® surface-mount SOIC (MH) package (28- and 44-pin). The SNAPHAT top contains both the battery and crystal and is designed to be “snapped on” after the SOIC is surface mounted on the PC board. Thus the two piece solution prevents the battery and crystal from being exposed to the high temperatures of the surface mount process.

Features ■ Provides battery backup power for non-volatile TIMEKEEPER® and supervisor devices in the 28- or 44-pin SNAPHAT® SOIC package ■ Removable battery avoids heat associated with surface mount process ■ Snaps directly onto surface-mounted SNAPHAT SOIC ■ Choice of battery capacities: – M4T28-BR12SH1 = 48 mAh – M4T32-BR12SH = 120 mAh ■ Keyed insertion to ensure proper assembly ■ Removable for replacement and proper disposal ■ Pb-free package ■ Available in Ecopack® packages, tubes or tape & reel

Features

Timekeeper®, Snaphat® Series
operate supply voltage: 2.8V
operate temperature at 0°C~70°C TA
Based on M4T28 part number
embedded in SOIC case
frequency : 32.768kHz
with 28 pins
4 terminations
1 timers

0°C ~ 70°C (TA) Operating Temperature

Applications

There are a lot of STMicroelectronics
M4T28-BR12SH1 IC Batteries applications.

• Telemetry, tracking and command
• Satelle aerials
• Stellite lransponders
• Multiple access methods
• Transmission equation
• Performance objectives
• Modulation systems
• Summary of international, regional and domestic stellies
• Earth stations for international telephony and television
• Regional and domestic communication