Analog Devices Inc. ADM8323 & ADM8324 Supervisory Circuits
Analog Devices Inc. ADM8323/ADM8324 Supervisory Circuits 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 push-pull (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 watchdog pulse within the timeout period). This effectively gives a window in which to observe the watchdog pulse. The watchdog timeout is measured from the last falling edge of the watchdog input (WDI).
The ADM8323/ADM8324 are available in a 5-lead SOT-23 package and typically consume only 10μA, making them suitable for use in low power portable applications.
Features
- Reset Threshold 2.901V (minimum) to 2.959V at TA=25°C
- Timeout 140ms (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
Applications
- Automotive
- Microprocessor systems
- Computers
- Controllers
- Intelligent instruments
- Portable equipment
Block Diagrams
Associated Products
Analog Devices Inc. ADM83xx Supervisory Circuits
Monitors power supply voltage levels and code execution integrity in microprocessor-based systems.
Analog Devices Inc. ADM8321 Supervisory Circuit
Monitors power supply voltage levels and code execution integrity in microprocessor-based systems.
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