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LTC692IS8

Description
Supervisory Circuits LTC692 - Microprocessor Supervisory Circuits
CategoryPower/power management    The power supply circuit   
File Size232KB,20 Pages
ManufacturerADI
Websitehttps://www.analog.com
Download Datasheet Parametric Compare View All

LTC692IS8 Overview

Supervisory Circuits LTC692 - Microprocessor Supervisory Circuits

LTC692IS8 Parametric

Parameter NameAttribute value
Is it Rohs certified?incompatible
MakerADI
package instructionPLASTIC, SOIC-8
Reach Compliance Codenot_compliant
ECCN codeEAR99
Is SamacsysN
Adjustable thresholdNO
Analog Integrated Circuits - Other TypesPOWER SUPPLY SUPPORT CIRCUIT
JESD-30 codeR-PDSO-G8
JESD-609 codee0
length4.9 mm
Humidity sensitivity level1
Number of channels1
Number of functions1
Number of terminals8
Maximum operating temperature85 °C
Minimum operating temperature-40 °C
Package body materialPLASTIC/EPOXY
encapsulated codeSOP
Package shapeRECTANGULAR
Package formSMALL OUTLINE
Peak Reflow Temperature (Celsius)235
Certification statusNot Qualified
Maximum seat height1.75 mm
Maximum supply voltage (Vsup)5.5 V
Minimum supply voltage (Vsup)4.5 V
Nominal supply voltage (Vsup)5 V
surface mountYES
technologyCMOS
Temperature levelINDUSTRIAL
Terminal surfaceTin/Lead (Sn/Pb)
Terminal formGULL WING
Terminal pitch1.27 mm
Terminal locationDUAL
Maximum time at peak reflow temperature20
width3.9 mm
Base Number Matches1
LTC692/LTC693
Microprocessor
Supervisory Circuits
FEATURES
n
n
n
n
n
n
n
n
n
n
n
n
DESCRIPTION
The LTC
®
692/LTC693 provide complete power supply
monitoring and battery control functions for microproces-
sor reset, battery backup, CMOS RAM write protection,
power failure warning and watchdog timing. A precise
internal voltage reference and comparator circuit monitor
the power supply line. When an out-of-tolerance condition
occurs, the reset outputs are forced to active states and the
chip enable output unconditionally write-protects external
memory. In addition, the
RESET
output is guaranteed to
remain logic low even with V
CC
as low as 1V.
The LTC692/LTC693 power the active CMOS RAMs with a
charge-pumped NMOS power switch to achieve low drop-
out and low supply current. When primary power is lost,
auxiliary power, connected to the battery input pin, powers
the RAMs in standby through an efficient PMOS switch.
For an early warning of impending power failure, the
LTC692/LTC693 provide an internal comparator with a
user-defined threshold. An internal watchdog timer is
also available, which forces the reset pins to active states
when the watchdog input is not toggled prior to a preset
timeout period.
L,
LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear
Technology Corporation. All other trademarks are the property of their respective owners..
Guaranteed
Reset Assertion at V
CC
= 1V
1.5mA Maximum Supply Current
Fast (35ns Maximum) Onboard Gating of RAM Chip
Enable Signals
4.40V Precision Voltage Monitor
Power OK/Reset Time Delay: 200ms or Adjustable
Minimum External Component Count
1μA Maximum Standby Current
Voltage Monitor for Power-Fail or Low Battery
Warning
Thermal Limiting
Performance Specified Over Temperature
Superior Upgrade for MAX690 Family
SO8 and SO16 Packaging
APPLICATIONS
n
n
n
n
Critical μP Power Monitoring
Intelligent Instruments
Battery-Powered Computers and Controllers
Automotive Systems
TYPICAL APPLICATION
5
V
IN
≥ 7.5V
LT1086-5
V
IN
ADJ
V
OUT
5V
RESET
Output Voltage vs
Supply Voltage
T
A
= 25°C
EXTERNAL PULL-UP = 10μA
V
BATT
= 0V
+
10μF
+
100μF
V
CC
0.1μF
LTC692
LTC693
V
BATT
3V
V
OUT
0.1μF
POWER TO
μP
CMOS RAM POWER
μP
SYSTEM
μP
RESET
μP NMI
I/O LINE
692_3 • TA01
RESET
OUTPUT VOLTAGE (V)
4
3
51k
PFI
10k
MICROPROCESSOR RESET, BATTERY BACKUP, POWER FAILURE
WARNING AND WATCHDOG TIMING ARE ALL IN A SINGLE CHIP
FOR MICROPROCESSOR SYSTEMS
GND
RESET
PFO
WDI
0.1μF
2
1
100Ω
0
0
1
3
4
2
SUPPLY VOLTAGE (V)
692_3 • TA02
5
0692fb
1

LTC692IS8 Related Products

LTC692IS8 LTC693CN
Description Supervisory Circuits LTC692 - Microprocessor Supervisory Circuits Supervisory Circuits LTC693 - Microprocessor Supervisory Circuits
Is it Rohs certified? incompatible incompatible
Maker ADI ADI
package instruction PLASTIC, SOIC-8 DIP,
Reach Compliance Code not_compliant not_compliant
ECCN code EAR99 EAR99
Adjustable threshold NO NO
Analog Integrated Circuits - Other Types POWER SUPPLY SUPPORT CIRCUIT POWER SUPPLY SUPPORT CIRCUIT
JESD-30 code R-PDSO-G8 R-PDIP-T16
JESD-609 code e0 e0
Humidity sensitivity level 1 1
Number of channels 1 1
Number of functions 1 1
Number of terminals 8 16
Maximum operating temperature 85 °C 70 °C
Package body material PLASTIC/EPOXY PLASTIC/EPOXY
encapsulated code SOP DIP
Package shape RECTANGULAR RECTANGULAR
Package form SMALL OUTLINE IN-LINE
Peak Reflow Temperature (Celsius) 235 235
Certification status Not Qualified Not Qualified
Maximum seat height 1.75 mm 3.937 mm
Maximum supply voltage (Vsup) 5.5 V 5.5 V
Minimum supply voltage (Vsup) 4.5 V 4.5 V
Nominal supply voltage (Vsup) 5 V 5 V
surface mount YES NO
technology CMOS CMOS
Temperature level INDUSTRIAL COMMERCIAL
Terminal surface Tin/Lead (Sn/Pb) Tin/Lead (Sn/Pb)
Terminal form GULL WING THROUGH-HOLE
Terminal pitch 1.27 mm 2.54 mm
Terminal location DUAL DUAL
Maximum time at peak reflow temperature 20 20
width 3.9 mm 7.62 mm
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