MAX6746

VCC to GND...........................................................-0.3V to +6.0V
SRT, SWT, SET0, SET1, RESET IN, WDS, MR,
WDI, to GND ...........................................-0.3V to (VCC + 0.3V)
RESET (Push-Pull) to GND........................-0.3V to (VCC + 0.3V)
RESET (Open Drain) to GND ..............................-0.3V to +6.0V
Input Current (All Pins) ................................................±20mA
Output Current (RESET) ...............................................±20mA
Continuous Power Dissipation (TA = +70°C)
8-Pin SOT23 (derate 8.9mW/°C above +70°C)............714mW
Operating Temperature Range ....................-40°C to +125°C
Storage Temperature Range .......................-65°C to +150°C
Junction Temperature..................................................+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 MAX6746MAX6753 low-power microprocessor (P) supervisory circuits monitor single/dual system supply voltages from 1.575V to 5V and provide maximum adjustability for reset and watchdog functions. These MAX6746 assert a reset signal whenever the VCC supply voltage or RESET IN falls below its reset threshold or when manual reset is pulled low. The reset output remains asserted for the reset timeout period after VCC and RESET IN rise above the reset threshold. The reset function of MAX6746 features immunity to power-supply transients.

The MAX6746MAX6753 have ±2% factory-trimmed reset threshold voltages in approximately 100mV increments from 1.575V to 5.0V and/or adjustable reset threshold voltages using external resistors.

The reset and watchdog delays are adjustable with external capacitors. The MAX6746MAX6751 contain a watchdog select input that extends the watchdog timeout period by 128x. The MAX6752/MAX6753 contain a window watchdog timer that looks for activity outside an expected window of operation.

The MAX6746MAX6753 are available with a push-pull or open-drain active-low RESET output. The MAX6746 MAX6753 are available in an 8-pin SOT23 package and are fully specified over the automotive temperature range (-40°C to +125°C).