LTC694_15 Datasheet, PDF (20/20 Pages) Linear Technology – Microprocessor Supervisory Circuits

LTC690/LTC691
LTC694/LTC695
Typical Application
Capacitor Back-Up with 74HC4016 Switch
Write Protect for Additional RAMs
5V
V_CC
V_OUT
0.1µF
R1
10k
10 11 12 14
1 _74HC4016
2
LTC691
LTC695
V_BATT LOWLINE
R2
30k
7
13 ₊
100µF
GND
0.1µF
LTC690 TA03
5V
0.1µF
3V
V_CC
V_OUT
LTC691
LTC695
CE OUT
V_BATT
CE IN
LOWLINE
GND
+
10µF
20ns PROPAGATION
DELAY
CSA
V_CC
0.1µF 62512
RAM A
CS
CSB
0.1µF
V_CC
62128
RAM B
CS1
CS2
CSC
0.1µF
V_CC
62128
RAM C
CS1
CS2
OPTIONAL CONNECTION FOR
ADDITIONAL RAMs
690 TA04
Related Parts
PART NUMBER DESCRIPTION
COMMENTS
LTC699
Microprocessor Supervisory Circuit
4.65V Threshold, Watchdog Timer
LTC1232
Microprocessor Supervisory Circuit
4.62V, 4.37V Thresholds, Watchdog Timer, Manual Reset
LTC1235
Microprocessor Supervisory Circuit
4.65V Threshold, Watchdog Timer, Power-Fail Warning, Manual Reset,
RAM Protect
LTC1326
Micropower Precision Triple-Supply Monitor
4.725V, 3.118V, 1V Thresholds (±0.75%)
LTC1536
Micropower Triple-Supply Monitor for PCI
Applications
Meets PCI t_FAIL Timing Specifications
LTC2912
Single UV/OV Voltage Monitor
Resistor Programmable Thresholds, UV/OV Outputs, Shunt Regulator
LTC2915
Voltage Supervisor with 27 Selectable Thresholds 9 Pin-Selectable Thresholds, 3 Tolerances, 1.5V to 5.5V Supply
LTC2916
Voltage Supervisor with 9 Selectable Thresholds
9 Pin-Selectable Thresholds, 1.5V to 5.5V Supply, Manual Reset
LTC2917
Voltage Supervisor with 27 Selectable Thresholds
and Watchdog Timer
9 Pin-Selectable Thresholds, 3 Tolerances, 1.5V to 5.5V Supply,
Adjustable Watchdog Timer
LTC2918
Voltage Supervisor with 9 Selectable Thresholds and 9 Pin-Selectable Thresholds, 1.5V to 5.5V Supply, Manual Reset,
Watchdog Timer
Adjustable Watchdog Timer
LTC2934
Ultralow Power Adjustable Supervisor with
Power-Fail Output
Resistor Programmable Thresholds, 500nA Quiescent Current, 1.6V to 5.5V
Supply, Power-Fail Warning, Manual Reset
LTC2935
Ultralow Power Adjustable Supervisor with
Power-Fail Output
8 Pin-Selectable Thresholds, 500nA Quiescent Current, Power-Fail Warning,
Manual Reset
20 Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 9503_F5_o-_r7_m41_or7_{e information www.linear.com/690}
[phone] ^● FAX: [phone] ^● www.linear.com/690
690ff
LT 0313 REV F • PRINTED IN USA
 LINEAR TECHNOLOGY CORPORATION 1992