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LTC699CS8 fiches techniques PDF

Linear Technology - Microprocessor Supervisory Circuit

Numéro de référence LTC699CS8
Description Microprocessor Supervisory Circuit
Fabricant Linear Technology 
Logo Linear Technology 





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LTC699CS8 fiche technique
FEATURES
s Guaranteed Reset Assertion at VCC = 1V
s 1.5mA Maximum Supply Current
s SO-8 Packaging
s 4.65V Precision Voltage Monitor
s Power OK/Reset Time Delay: 200ms
s Minimum External Component Count
s Performance Specified Over Temperature
s Superior Upgrade for MAX699
APPLICATI S
s Critical µP Power Monitoring
s Intelligent Instruments
s Computers and Controllers
s Automotive Systems
LTC699
Microprocessor
Supervisory Circuit
DESCRIPTIO
The LTC699 provides power supply monitoring for
microprocessor-based systems. The features include mi-
croprocessor reset and watchdog timing. Precise internal
voltage reference and comparator circuit monitor the
power supply line. When an out-of-tolerance condition
occurs, the RESET output is forced to active low. In
addition, the RESET output is guaranteed to remain logic
low even with VCC as low as 1V.
An internal watchdog timer is also available, which forces
the RESET output to active low when the watchdog input
is not toggled prior to the time-out period of 1.6 seconds.
The LTC699 is offered in DIP and surface mount packages.
TYPICAL APPLICATI
BLOCK DIAGRA
+5V
VCC RESET
500k
LTC699
0.1µF
WDI
GND
µP POWER
µP RESET
µP
SYSTEM
I/O LINE
0.1µF
VCC
+
C1
1.3V
OSC
RESET PULSE
GENERATOR
WATCHDOG
TIMER
MICROPROCESSOR RESET AND WATCHDOG TIMING IN
A SINGLE CHIP FOR MICROPROCESSOR SYSTEMS.
LTC699 TA1
WDI
TRANSITION
DETECTOR
RESET
GND
LTC699 BD
1

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