6-Pin µP Reset Circuit with Power-Fail Comparator

The MAX6342-MAX6345 family of microprocessor (µP) supervisory circuits monitors power supplies in digital systems. These devices significantly improve system reliability and accuracy compared to separate ICs or discrete components.

The MAX6342-MAX6345 provide factory-trimmed VCC reset threshold voltages from 2.33V to 4.63V and operate with supply voltages between +1V and +5.5V. A +1.25V threshold detector allows for a power-fail warning, for low-battery detection, or for monitoring another power supply. The MAX6342 contains an active-low MR input and an active-low push-pull reset. The MAX6343 and MAX6344 are identical to the MAX6342 except they provide an active-low, open-drain reset and an active-high, push-pull reset, respectively. The MAX6345 provides a second reset output in place of the active-low MR input to give it an active-high push-pull reset and an active-low push-pull reset.

All of the devices are packaged in a miniature 6-pin SOT23.

Applications

* Embedded Control Systems * Multivoltage Systems * Network Equipment * Portable Battery-Powered Equipment * Portable Computing * Telecom Equipment

* Small 6-Pin SOT23 Package

* Precision Factory-Set VCC Reset Thresholds Between 2.33V and 4.63V

* Guaranteed Active-Low RESET Valid to VCC = +1V

* 100ms min Reset Pulse Width

* Debounced CMOS-Compatible Manual-Reset Input

* Voltage Monitor for Power-Fail or Low-Battery Warning