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LTC1726EMS8-5

Description
Processor Supervisor 3.085V/4.675V/Adj 3 Active Low/Open Drain Automotive 8-Pin MSOP
File Size202KB,14 Pages
ManufacturerADI
Websitehttps://www.analog.com
Download Datasheet Parametric View All

LTC1726EMS8-5 Overview

Processor Supervisor 3.085V/4.675V/Adj 3 Active Low/Open Drain Automotive 8-Pin MSOP

LTC1726EMS8-5 Parametric

Parameter NameAttribute value
EU restricts the use of certain hazardous substancesNot Compliant
ECCN (US)EAR99
Part StatusLTB
HTS8542.39.00.01
SVHCYes
SVHC Exceeds ThresholdYes
Number of Supervisors3
Output DriverActive Low/Open Drain
Minimum Reset Threshold Voltage (V)3.036|4.6|Adj
Typical Reset Threshold Voltage (V)3.085|4.675|Adj
Maximum Reset Threshold Voltage (V)3.135|4.75|Adj
Monitored Voltage (V)3.3|5|Adj
Minimum Operating Supply Voltage (V)1
Maximum Operating Supply Voltage (V)7
Maximum Supply Current (uA)30
Power Fail DetectionNo
Watchdog TimerYes
Manual ResetYes
Chip Enable SignalsNo
Battery Backup SwitchingNo
Minimum Operating Temperature (°C)-40
Maximum Operating Temperature (°C)85
Supplier Temperature GradeExtended
TypeVoltage Supervisory
Pin Count8
Standard Package NameMSOP
Supplier PackageMSOP
MountingSurface Mount
Package Height0.86
Package Length3
Package Width3
PCB changed8
Lead ShapeGull-wing
LTC1726
Triple Supply Monitor and
µP Supervisor with Adjustable
Reset and Watchdog Timer
FeaTures
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DescripTion
The
LTC
®
1726
is a triple supply monitor and microproces-
sor supervisory circuit with adjustable reset and watchdog
functions intended for systems with multiple supply volt-
ages. The part has a common open-drain reset output
with an adjustable delay. The reset and watchdog time-out
periods are both adjustable using external capacitors.
Tight 1.5% accuracy specifications and glitch immunity
ensure reliable reset operation without false triggering.
The
RST
output is guaranteed to be in the correct state for
V
CC5
/V
CC25
or V
CC3
down to 1V. The LTC1726 may also be
configured to monitor any one or two V
CC
inputs instead
of three, depending on system requirements.
The low (16µA typical) supply current makes the LTC1726
ideal for power-conscious systems.
L,
LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and
ThinSOT is a trademark of Linear Technology Corporation. All other trademarks are the property
of their respective owners.
n
n
n
n
n
n
n
n
Monitors Three Inputs Simultaneously
LTC1726-5: 5V, 3.3V and ADJ
LTC1726-2.5: 2.5V, 3.3V and ADJ
±1.5% Threshold Accuracy Over Temperature
Low Supply Current: 16µA Typ
Adjustable Reset Timeout
Adjustable Watchdog Timeout
Active Low Open-Drain Reset Output
Power Supply Glitch Immunity
Guaranteed
RESET
for V
CC3
≥ 1V or V
CC25
/V
CC5
≥ 1V
MS8 and SO-8 Packages
applicaTions
n
n
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Desktop Computers
Notebook Computers
Intelligent Instruments
Portable Battery-Powered Equipment
Network Servers
Typical applicaTion
A 3.3V, 5V and 1.8V Monitor
1.8V
(V
TRIP
= 1.665V)
3.3V
0.1µF
5V
0.1µF
C
RT
47nF
C
WT
47nF
2
8
1
3
6
R1
66.5k
1%
R2
100k
1%
RESET
µP
I/O
C
WT
47nF
3.3V
0.1µF
2.5V
0.1µF
C
RT
47nF
2
8
1
3
6
A 3.3V, 2.5V and 1.8V Monitor
1.8V
(V
TRIP
= 1.665V)
R1
66.5k
1%
R2
100k
1%
RESET
µP
I/O
V
CC5
V
CC3
V
CCA
RT
RST
LTC1726-5
V
CC25
V
CC3
V
CCA
RT
RST
LTC1726-2.5
7
WT
GND
WDI
7
WT
GND
WDI
5
5
t
RT
= 155ms
t
WT
= 1s
4
1726 TA01
t
RT
= 155ms
t
WT
= 1s
4
1726 TA02
1726fd
For more information
www.linear.com/LTC1726
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