描述 Description

The M4Txx-BR12SH SNAPHAT?top is a detachable lithium power source for ST’s serial real-time clock and non-volatile TIMEKEEPER?surface-mount SOIC 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.

特性 Features

? Provides battery backup power for serial real-time clock, 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-BR12SH = 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

簡介

M4T28-BR12SH屬于集成電路（IC）的IC電池。由制造生產(chǎn)的M4T28-BR12SHIC 電池該產(chǎn)品族的中產(chǎn)品是用來給應(yīng)用中實時時鐘供電的專用模塊，包含電化學(xué)電源，在外部電源缺失時追蹤時間的流逝。這些產(chǎn)品通常用于特定的計時集成電路，提供了一個溫度敏感型組件的組裝解決方案，可在其他高溫組裝過程完成之后，再將其組裝到印刷電路板上。