LTC1726
14
1726fd
For more information www.linear.com/LTC1726
LINEAR TECHNOLOGY CORPORATION 2000
LT 0413 REV D • PRINTED IN USA
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900
●
FAX: (408) 434-0507
●
www.linear.com/LTC1726
relaTeD parTs
Typical applicaTion
PART NUMBER DESCRIPTION COMMENTS
LTC690 5V Supply Monitor, Watchdog Timer and Battery Backup 4.65V Threshold
LTC694-3.3 3.3V Supply Monitor, Watchdog Timer and Battery Backup 2.9V Threshold
LTC699 5V Supply Monitor and Watchdog Timer 4.65V Threshold
LTC1232 5V Supply Monitor, Watchdog Timer and Push-Button Reset 4.37V/4.62V Threshold
LTC1326 Micropower Precision Triple Supply Monitor for 5V, 3.3V and ADJ 4.725V, 3.118V, 1V Thresholds (±0.75%) 5V, 3.3V, ADJ
LTC1326-2.5 Micropower Precision Triple Supply Monitor for 2.5V, 3.3V and ADJ 2.363V, 3.118V, 1V Thresholds (±0.75%) 2.5V, 3.3V, ADJ
LTC1536 Precision Triple Supply Monitor for PCI Applications Meets PCI t
FAIL
Timing Specifications
LTC1727-5 Micropower Triple Supply Monitor with Individual Outputs 4.675V, 3.086V, 1V Thresholds (±1.5%) 5V, 3.3V, ADJ
LTC1727-2.5 Micropower Triple Supply Monitor with Individual Outputs 2.338V, 3.086V, 1V Thresholds (±1.5%) 2.5V, 3.3V, ADJ
LTC1728-5 Micropower Triple Supply Monitor in 5-Pin SOT-23 Package 4.675V, 3.086V, 1V Thresholds (±1.5%) 5V, 3.3V, ADJ
LTC1728-2.5 Micropower Triple Supply Monitor in 5-Pin SOT-23 Package 2.338V, 3.086V, 1V Thresholds (±1.5%) 2.5V, 3.3V, ADJ
LTC1728-1.8 Micropower Triple Supply Monitor in 5-Pin SOT-23 Package 2.805V, 1.683V, 1V Thresholds (±1.5%) 3V, 1.8V, ADJ
LTC1985-1.8 Micropower Triple Supply Monitor for 3V, 1.8V and ADJ Push-Pull RESET Output, SOT-23
LTC2900 Quad Supply Monitor Adjustable Reset Timer
LTC2901 Quad Supply Monitor with Watchdog
Timer Adjustable W
atchdog and Reset Timers
LTC2902 Quad Supply Monitor with Selectable Supply Tolerance Reset Disable for Margining Applications
LTC2903 Precision Quad Supply Monitor in SOT-23 Fixed and Adjustable Threshold Combinations
LTC2908 Precision Six Supply Monitor 8-Lead ThinSOT™ and 3mm × 2mm DFN Packages
LTC2910 Octal Positive/Negative Voltage Monitor 8 Low Voltage Adjustable Inputs (0.5V)
Triple Supply Monitor with Watchdog Timer and Manual Reset Button
V
CC3
V
CC5
V
CCA
GND
RT
WT
RST
WDI
LTC1726-5
1726 TA09
100nF
5V 3.3V
V
TRIP
= 11.2V
(±0.17V)
47nF
R2
105k
0.1%
*OPTIONAL RESISTOR RECOMMENDED
TO EXTEND ESD TOLERANCE
R3*
10k
5%
MANUAL
RESET BUTTON
(NORMALLY OPEN)
R1
1.07M
0.1%
47nF
100nF
V
TRIP
= (R1 + R2)
R1 = R2
– 1
V
CCA
R2
( )
V
TRIP
V
CCA
µP
RESET
I/O
t
RT
= 155ms
t
WT
= 1s
