BQ3287 Datasheet, PDF (5/8 Pages) Texas Instruments – Real-Time Clock RTC Module

bq3287/bq3287A
Data Sheet Revision History
Change No.
Page No.
Description
Nature of Change
1
1
Address strobe input
Clarification
1
2
Power-fail detect voltage V_PFD
Was 4.1 min, 4.25 max;
is 4.0 min, 4.35 max
Was : “As shipped from Benchmarq, the backup cell
is electrically isolated from the memory. ”
2
1
Is: “As shipped from Benchmarq, the backup cell is ^{Clarification}
electrically isolated from the active circuitry. ”
Changed temperature from N (industrial, -40 to
2
2, 4
+85°C) to I (extended, -20 to +70°C)
Specification change
3
2
IRCL max. was 275; is now 185. Pull-up = 30K
IMOTH max. was -275; is now -185. Pull-down = 30K
Changed values
Notes:
Change 1 = Nov. 1992 B changes from June 1991 A.
Change 2 = Nov. 1995 C changes from Nov. 1992 B.
Change 3 = Sept. 1996 D changes from Nov. 1995 C.
Ordering Information
bq3287 MT -
Temperature:
blank = Commercial (0 to +70°C)
I = Extended* (-20 to +70°C)
Package Option:
MT = T-type module
RAM Clear Option:
A = RAM clear on pin 21
no mark = No connect on pin 21
Device:
bq3287 Real-Time Clock Module
*Contact factory for availability.
Sept. 1996 D
5