LTC690/LTC691
LTC694/LTC695
TYPICAL APPLICATION
Capacitor Back-Up with 74HC4016 Switch
5V
0.1μF
R1
10k
10 11 12 14
1 74HC4016
2
VCC
VOUT
LTC691
LTC695
VBATT LOW⎯LINE
R2
30k
7
13 +
100μF
GND
0.1μF
LTC690 TA03
Write Protect for Additional RAMs
5V
0.1μF
3V
VCC
VOUT
LTC691
LTC695
CE OUT
VBATT
CE IN
LOW⎯LINE
GND
+
10μF
20ns PROPAGATION
DELAY
CS⎯A
0.1μF
VCC
62512
RAM A
CS
CS⎯B
0.1μF
VCC
62128
RAM B
CS⎯1
CS2
CS⎯C
0.1μF
VCC
62128
RAM C
CS⎯1
CS2
OPTIONAL CONNECTION FOR
ADDITIONAL RAMs
690 TA04
RELATED PARTS
PART NUMBER
LTC1326
LTC1536
DESCRIPTION
Micropower Precision Triple Supply Monitor
Micropower Triple Supply Monitor for PCI Applications
COMMENTS
4.725V, 3.118V, 1V Thresholds (± 0.75%)
Meets PCI tFAIL Timing Specifications
18 Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900 ● FAX: (408) 434-0507 ● www.linear.com
690fe
LT 0410 REV E • PRINTED IN USA
© LINEAR TECHNOLOGY CORPORATION 1992