MAX6323

Terminal Voltage (with respect to GND)
V_CC .......................................................................-0.3V to +6.0V
MR, RESET (MAX6323), WDI ......................-0.3V to (VCC + +0.3V)
WDPO, RESET (MAX6324).......................................-0.3V to +6.0V
Input Current, V_CC, WDI, MR................................................20mA
Output Current, RESET, WDPO .............................................20mA
Rate of Rise, V_CC ...........................................................100V/s
Continuous Power Dissipation (T_A = +70°C)
6-Pin SOT23 (derate 8.7mW/°C above +70°C)...............696mW
Operating Temperature Range ........................-40°C to +125°C
Junction Temperature......................................................+150°C
Storage Temperature Range ............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
Stresses beyond those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.

The MAX6323/MAX6324 microprocessor (P)supervisory circuits monitor power supplies and P activity in digital systems. A watchdog timer looks for activity outside an expected window of operation. Six lasertrimmed reset thresholds are available with ±2.5% accuracy from +2.32V to +4.63V. Valid RESET output is guaranteed down to V_CC = +1.2V.

The RESET output is either push-pull (MAX6323) or open-drain (MAX6324). RESET is asserted low when V_CC falls below the reset threshold, or when the manual reset input (MR) is asserted low. RESET remains asserted for at least 100ms after V_CC rises above the reset threshold and MR is deasserted.

The watchdog pulse output (WDPO) utilizes an opendrain configuration. MAX6323 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 the timeout period). The watchdog timeout is measured from the last falling edge of watchdog input (WDI) with a minimum pulse width of 300ns.WDPO is asserted for 1ms when a fault is observed. Eight laser-trimmed timeout periods are available.

The MAX6323/MAX6324 are offered in a 6-pin SOT23 package and operate over the extended temperature range (-40°C to +125°C).