MAX6353LSUK

Overview

The MAX6353LSUK is a dual-voltage microprocessor supervisory circuit manufactured by Analog Devices Inc. (Maxim Integrated). It monitors two independent power-supply voltages, asserting active-low push-pull reset outputs when inputs drop below preset thresholds. The device features a debounced manual reset input and operates over an extended temperature range of -40°C to +85°C. Key electrical parameters include a reset delay time of 180 ms and a minimum power-on reset pulse width of 100 ms. It draws a supply current of 20 µA and is available in a compact SOT-23-5 package.

Feature Summary

• Dual voltage monitoring with active-low push-pull reset outputs referenced to VCC1
• Debounced TTL/CMOS-compatible manual-reset input for system control
• Precision factory-set power-supply reset thresholds ensure accurate supervision
• Extended operating temperature range supports harsh industrial environments

Applications

• Multi-rail embedded systems requiring simultaneous voltage supervision
• Industrial control units needing reliable power-fail detection
• Communication equipment monitoring critical logic and I/O supplies

Procurement Notes

Verify the complete part number including suffixes such as LSUK or UVUK, as these indicate specific threshold voltages and package variants. Confirm availability status, as some versions may be limited supply or obsolete. Ensure the selected variant matches the required reset thresholds for your specific power rails. Cross-reference datasheet specifications against your design requirements before ordering.

Selection Notes

Select this component when precise monitoring of two distinct voltage rails is required without external resistors. The fixed threshold options eliminate calibration needs. Consider the SOT-23-5 package size for space-constrained designs. Verify that the 180 ms reset delay meets your system startup timing requirements. Ensure the active-low output polarity aligns with your downstream logic interface.

Part Context

This device belongs to the MAX6351–MAX6360 family of dual/triple-voltage supervisory circuits. These components improve system reliability by replacing discrete monitoring solutions. The series offers various threshold combinations and package options, including 5-pin and 6-pin SOT-23 formats. They are designed to assert resets if any monitored supply falls below its threshold, ensuring robust protection for sensitive microprocessors and memory devices.

FAQ

What is the reset delay time for the MAX6353LSUK?

The reset delay time is 180 ms.

Does the MAX6353LSUK include a watchdog timer?

No, the MAX6353 does not offer a watchdog timer; this feature is available in other members of the MAX635x family such as the MAX6358.

What is the minimum power-on reset pulse width?

The minimum power-on reset pulse width is 100 ms.