ADM6825

Obsolete

Low Voltage Supervisory Circuits with Watchdog and Manual Reset in 5-Lead SOT-23

Data Sheet (Rev. B) Product Selection Table

Viewing:

Overview

Precision Low Voltage Monitoring
9 Reset Threshold Options: 1.58 V to 4.63 V
140 ms (min) Reset Timeout
Watchdog Timer with 1.6 sec Timeout
Reset Output Stages
Push-pull Active-low
Open-drain Active-low
Push-pull Active-high

Low Power Consumption (7 μA)
Guaranteed Reset Output Valid to V_CC= 1 V
Power Supply Glitch Immunity
Specified from −40°C to +125°C
5-lead SOT-23 Package

The ADM6823/ADM6824/ADM6825 are supervisory circuits that monitor power supply voltage levels and code execution integrity in microprocessor-based systems. As well as 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 means of an external push-button through a manual reset input. The parts feature different combinations of watchdog input and manual reset input and output stage configurations, as shown in Table 1 in the datasheet.

Each part is available in nine reset threshold options, ranging from 1.58 V to 4.63 V. The reset and watchdog timeout periods are fixed at 140 ms (minimum) and 1.6 sec (typical), respectively.

The ADM6823/ADM6824/ADM6825 are available in 5-lead SOT-23 packages and typically consume only 7 μA, making them suitable for use in low power, portable applications.

Applications