603-00002

Overview

The Parallax Inc. 603-00002 is a voltage supervisory circuit designed for monitoring single-input power rails. It operates within a threshold voltage range of 700 mV to 10 V, featuring specific undervoltage and overvoltage detection thresholds of 4.12 V and 4.28 V respectively. The device utilizes a CMOS open-drain output with a manual reset capability and a reset delay time of 200 us. Packaged in an SOT-23A-3 through-hole format, it consumes a working supply current of 1.1 uA and supports a maximum power dissipation of 240 mW. It functions reliably across a temperature range of -40 C to +85 C.

Feature Summary

• Provides precise voltage supervision with dedicated undervoltage and overvoltage detection thresholds.
• Features manual reset functionality and an open-drain CMOS output interface.
• Designed for low-power applications with minimal operating supply current consumption.

Applications

• Power supply monitoring in electronic systems requiring voltage integrity checks
• Backup battery switching circuits for maintaining system operation during power transitions
• Microcontroller reset management in embedded designs

Procurement Notes

Verify component authenticity and datasheet alignment when sourcing this discontinued part. Confirm package type and pinout compatibility with existing PCB footprints. Check for moisture sensitivity handling requirements during storage and assembly. Ensure replacement strategies account for the lack of current manufacturing support.

Selection Notes

Select this component for applications requiring simple, low-power voltage supervision without watchdog timer complexity. Consider the manual reset feature if hardware intervention is acceptable for recovery. Evaluate the SOT-23A-3 package constraints against available board space. Verify that the 1.1 uA current draw meets strict power budget requirements.

Part Context

This supervisory circuit belongs to Parallax's PMIC lineup, focusing on essential power management functions. It serves as a fundamental building block for ensuring stable operation in battery-powered or sensitive digital circuits. The design prioritizes reliability and low quiescent current over advanced programmable features.

FAQ

Does the 603-00002 include a built-in watchdog timer?

No, the component does not include a watchdog timer function.

What is the reset delay time for this supervisory circuit?

The reset delay time is specified as 200 us.