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| MAX6814 Datasheet, PDF (1/6 Pages) Maxim Integrated Products – 5-Pin Watchdog Timer Circuit | |||
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19-2804; Rev 1; 3/04
5-Pin Watchdog Timer Circuit
________________General Description
The MAX6814 is a low-power watchdog circuit in a tiny 5-
pin SC70 package. This device improves system reliability
by monitoring the system for software code execution
errors. When the watchdog input detects a transitional
edge, the internal watchdog timer clears and restarts,
then begins counting again. If the watchdog timer
exceeds the watchdog timeout period (1.6s typ), the
active-low, push-pull watchdog output asserts for the
watchdog pulse period (140ms min) to alert the system of
the fault.
The MAX6814 consumes only 4µA of supply current and
is fully specified over the extended temperature range.
⦠4µA Operating Current
Features
⦠Watchdog Timer with 1.6s Timeout
⦠140ms (min) WDO Pulse Period
⦠Push-Pull Active-Low WDO
⦠Fully Specified Over Extended Temperature
Range
⦠No External Components
________________________Applications
Computers and Controllers
Embedded Controllers
Intelligent Instruments
Automotive Systems
Critical µP Monitoring
PART
MAX6814XK-T
Ordering Information
TEMP
RANGE
-40°C to +85°C
PIN-
PACKAGE
5 SC70-5
TOP
MARK
AE K
Typical Operating Circuit
VCC
VCC
WDO
MAX6814
WDI
GND
VCC
NMI
µP
I/O
GND
Pin Configuration
TOP VIEW
WDO 1
5 VCC
MAX6814
GND 2
N.C. 3
4 WDI
SC70-5
________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maximâs website at www.maxim-ic.com.
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