ADM825SYRJZ-R7

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**

.

Microprocessor systems

.

Computers

.

Controllers

.

Intelligent instruments

.

Portable equipment

### Features and Benefits

.

Precision 2.5 V to 5 V power supply monitor

.

7 reset threshold options: 2.19 V to 4.63 V

.

140 ms minimum reset timeout

.

Manual reset input ADM823, ADM825

.

Push-pull output stages 

RESET ADM823 

RESET, RESET ADM824/ADM825

.

Watchdog timer with 1.6 sec timeout ADM823, ADM824

.

Low power consumption 5 μA

.

See Data Sheet for Additional Information