M4T28-BR12SH 查看數據表（PDF） - STMicroelectronics

零件编号

产品描述 (功能)

生产厂家

M4T28-BR12SH

TIMEKEEPER® SNAPHAT® (battery and crystal)

STMicroelectronics 

M4T28-BR12SH, M4T32-BR12SH

8

Revision history

Revision history

Table 7. Document revision history

Date

Revision

Changes

Nov-1999

01-Mar-2001

04-Jun-2001

10-Jul-2001

21-Jan-2002

20-Aug-2002

14-Mar-2003

20-Nov-2008

1

First issue

2

Reformatted

2.1 Basic textual changes from reformatting activity

2.2

Changes references to “supervisor” from “controller;” clarify temperature

characteristics

2.3

Change to include crystal accuracy (Table 3); add text for SNAPHAT®

insertion force tolerance and battery characteristics note

2.4 Updated insertion/extraction data (Figure 2)

2.5 Add pb-free note on page 1

3

Reformatted document; updated cover page, Section 5: Package

mechanical data, Table 6; added Section 7: Environmental information.

15/16

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