(ADM8323 / ADM8324) Supervisory Circuits
Supervisory Circuits with Windowed Watchdog and Manual Reset in 5-Lead SOT-23
Data Sheet
FEATURES
Windowed watchdog, 8 t...
Description
Supervisory Circuits with Windowed Watchdog and Manual Reset in 5-Lead SOT-23
Data Sheet
FEATURES
Windowed watchdog, 8 timeout options 26 reset threshold options 2.5 V to 5 V in 100 mV increments 4 reset timeout options 1 ms, 20 ms, 140 ms, and 1120 ms (minimum) Manual reset input Open-drain or push-pull RESET outputs Low power consumption Specified over wide temperature range (−40°C to +125°C) Qualified for automotive applications 5-lead SOT-23 package
ADM8323
VCC VCC VREF
ADM8323/ADM8324
FUNCTIONAL BLOCK DIAGRAMS
RESET GENERATOR
RESET
MR
DEBOUNCE WINDOWED WATCHDOG DETECTOR
11802-001
GND
WDI
Figure 1.
APPLICATIONS
Automotive Microprocessor systems Computers Controllers Intelligent instruments Portable equipment
VCC
ADM8324
VREF
RESET GENERATOR
RESET
MR
DEBOUNCE WINDOWED WATCHDOG DETECTOR
11802-002
Free Datasheet http://www.Datasheet4U.com
GND
WDI
Figure 2.
GENERAL DESCRIPTION
The ADM8323/ADM8324 are supervisory circuits that monitor power supply voltage levels and code execution integrity in microprocessor-based systems. An on-chip watchdog timer checks for activity within a preset timeout window. A reset signal can also be asserted by an external push-button switch through a manual reset input. The RESET output is either pushpull (ADM8323) or open-drain (ADM8324). A watchdog failure results in a low output on the RESET pin. A failure can be triggered either by a fast watchdog error (watchdog pulses too close together) or by a slow watchdog error (no watch...
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