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

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Replacement Parts

Rochester Electronics is the only authorized source of Analog Devices' products that have previously been discontinued or have become obsolete. Product availability should be checked directly with Rochester Electronics.

Product Details

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.

  • Microprocessor systems
  • Computers
  • Controllers
  • Intelligent instruments
  • Portable equipment