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
