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LTC2935ITS8-4#TRPBF

Description
Processor Supervisor 2.44V/2.32V/2.2V/2.08V/1.96V/1.84V/1.72V/1.6V 1 Active Low 8-Pin TSOT-23 T/R
File Size133KB,12 Pages
ManufacturerADI
Websitehttps://www.analog.com
Download Datasheet Parametric View All

LTC2935ITS8-4#TRPBF Overview

Processor Supervisor 2.44V/2.32V/2.2V/2.08V/1.96V/1.84V/1.72V/1.6V 1 Active Low 8-Pin TSOT-23 T/R

LTC2935ITS8-4#TRPBF Parametric

Parameter NameAttribute value
EU restricts the use of certain hazardous substancesCompliant
ECCN (US)EAR99
Part StatusActive
Number of Supervisors1
Maximum Reset Active Time (ms)200
Output DriverActive Low
Minimum Reset Threshold Voltage (V)2.404|2.286|2.167|2.049|1.931|1.813|1.695|1.576
Typical Reset Threshold Voltage (V)2.44|2.32|2.2|2.08|1.96|1.84|1.72|1.6
Maximum Reset Threshold Voltage (V)2.476|2.354|2.233|2.111|1.989|1.867|1.745|1.624
Monitored Voltage (V)5.5(Max)
Maximum Operating Supply Voltage (V)5.5
Maximum Supply Current (uA)1
Power Fail DetectionYes
Watchdog TimerNo
Manual ResetYes
Chip Enable SignalsNo
Battery Backup SwitchingNo
Minimum Operating Temperature (°C)-40
Maximum Operating Temperature (°C)85
Supplier Temperature GradeIndustrial
PackagingTape and Reel
TypeVoltage Monitor
Pin Count8
Standard Package NameSOT-23
Supplier PackageTSOT-23
MountingSurface Mount
Package Height0.9(Max)
Package Length2.9
Package Width1.75(Max)
PCB changed8
Lead ShapeGull-wing
LTC2935
Ultra-Low Power Supervisor
with Power-Fail Output,
Selectable Thresholds
FEATURES
n
n
n
n
n
n
n
n
n
DESCRIPTION
The LTC
®
2935 ultra-low power voltage monitor provides
system initialization, power-fail warning and reset gen-
eration functions. Low quiescent current (500nA typical)
makes the LTC2935 an ideal choice for battery-operated
applications.
Three binary threshold-select inputs configure one of
eight integrated reset thresholds, ranging from 1.6V to
3.45V in pre-determined increments. Early warning of an
impending low voltage condition is provided at the power-
fail output (PFO), whose threshold is above the configured
reset threshold. Supervisory circuits monitor V
CC
and
pull
RST
low when V
CC
drops below the configured reset
threshold. When V
CC
is rising from an under-threshold
condition, an internal reset timer is started after exceeding
the reset threshold by 5%. A 200ms reset timeout delays
the return of the
RST
output to a high state. A pushbut-
ton switch connected to the
MR
input is typically used to
force a manual reset. Outputs
RST
and
PFO
are available
with open-drain (LTC2935-1/LTC2935-3) or active pull-up
(LTC2935-2/LTC2935-4) circuits. Operating temperature
range is from –40°C to 85°C.
500nA Quiescent Current
±1.5% (Max) Accuracy over Temperature
Integrated Precision Attenuators
Eight Pin-Selectable Reset Thresholds
Eight Pin-Selectable Power-Fail Thresholds
Early Warning Power-Fail Output
200ms Reset Timeout
Manual Reset Input
Compact 8-Lead, 2mm
×
2mm DFN and
TSOT-23 (ThinSOT™) Packages
APPLICATIONS
n
n
n
n
n
Portable Equipment
Battery-Powered Equipment
Security Systems
Point-of-Sale Devices
Wireless Systems
L,
LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear
Technology Corporation. ThinSOT is a trademark of Linear Technology Corporation. All other
trademarks are the property of their respective owners.
TYPICAL APPLICATION
Falling Threshold Selection Table
Configurable Low Power Voltage Monitor
V
IN
V
CC
0.1μF
S2
S1
S0
MR
GND
2935 TA01a
LTC2935-1/LTC2935-2
LTC2935-3/LTC2935-4
PFO
LTC2935-2
BATTERY
POWERED
SYSTEM
LOGIC
RST
RESET
POWER-FAIL
RESET
POWER-FAIL
THRESHOLD THRESHOLD THRESHOLD THRESHOLD
(V)
(V)
(V)
(V)
3.30
3.15
3.00
2.85
2.70
2.55
2.40
2.25
3.45
3.30
3.15
3.00
2.85
2.70
2.55
2.40
2.44
2.32
2.20
2.08
1.96
1.84
1.72
1.60
2.56
2.44
2.32
2.20
2.08
1.96
1.84
1.72
S2
Low
Low
Low
Low
High
High
High
High
S1
Low
Low
High
High
High
Low
Low
High
S0
Low
High
High
Low
Low
Low
High
High
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