ADM824LYRJZ-REEL7

监控电路 Watchdog Supervisor with MR - IC.

Product Details

The ADM823/ADM824/ADM825 are supervisory circuits that monitor power supply voltage levels and code execution integrity in microprocessor-based systems. In addition to providing power-on reset signals, an on-chip watchdog timer can reset the microprocessor if it fails to strobe within a preset timeout period. A reset signal can also be asserted by an external push-button, through a manual reset input. The three parts feature different combinations of watchdog input, manual reset input, and output stage configuration, as shown in Table 1.

These parts are available in a choice of seven reset threshold options ranging from 2.19 V to 4.63 V. The reset and watchdog timeout periods are fixed at 140 ms minimum and 1.6 sec typical, respectively.

The ADM823/ADM824/ADM825 are available in 5-lead SC70 and SOT-23 packages and typically consume only 5 μA, making them suitable for use in low power, portable applications.

**Applications**

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Microprocessor systems

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Computers

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Controllers

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Intelligent instruments

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Portable equipment

### Features and Benefits

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Precision 2.5 V to 5 V power supply monitor

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7 reset threshold options: 2.19 V to 4.63 V

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140 ms minimum reset timeout

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Manual reset input

ADM823, ADM825

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Push-pull output stages 

RESET ADM823 RESET,

RESET ADM824/ADM825

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Watchdog timer with 1.6 sec timeout ADM823, ADM824

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Low power consumption 5 μA

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See Data Sheet for Additional Information