MAX6324HUT29+T

The MAX6324HUT29+T from Maxim Integrated Products is a microprocessor (µP) supervisory circuit with watchdog and manual reset in 6 pin SOT-23 package. This supervisory circuit monitors power supplies and µP activity in digital systems. A watchdog timer looks for activity outside an expected window of operation. The active-low RESET is asserted low when VCC falls below the reset threshold or when manual reset input (active-low MR) is asserted low. Active-low RESET remains asserted for at least 100ms after VCC rises above reset threshold and MR (active-low) is deasserted. The watchdog pulse output (active-low WDPO) utilizes an open-drain configuration. It can be triggered either by a fast timeout fault (watchdog input pulses are too close to each other) or a slow timeout fault (no watchdog input pulse is observed within timeout period). The watchdog timeout is measured from last falling edge of watchdog input (WDI) with minimum pulse width of 300ns.

• Supply voltage range from 1.2V to 5.5V
• Operating temperature range from -40°C to 125°C
• Pulsed open-drain, active-low watchdog output
• Power-on reset
• Precision monitoring of +2.5V, +3V, +3.3V and +5V power supplies
• Active-low, open-drain reset output and debounced manual reset input
• Low power operation, supply current of 23µA at VCC = 2.5V or 3.3V
• Reset valid to VCC = +1.2V
• Reset threshold voltage of 2.93V and reset timeout delay of 180ms
• Maximum watchdog timeout (fast) 719ms and maximum watchdog timeout (slow) of 1.8s