MAX921ESA-T

Comparators Overview

The MAX921ESA-T is a single-channel micro-power comparator in an 8-pin SO package. It operates from a single +2.5V to +11V supply or ±1.25V to ±5.5V dual supply, drawing less than 4μA quiescent current. The device features an internal 1.182V ±1% bandgap reference and programmable hysteresis via the HYST pin. Outputs are TTL/CMOS-compatible, sinking up to 50mA and sourcing continuously up to 40mA without crowbar glitches. Propagation delay is typically 12μs with 10mV overdrive.

Comparators Feature Summary

• Ultra-low power consumption with quiescent current under 4μA across temperature ranges
• Integrated 1.182V precision bandgap voltage reference with ±1% accuracy
• Unique output stage providing high source current capability while eliminating switching crowbar currents
• Simplified hysteresis implementation using the dedicated HYST pin and external resistors

Comparators Applications

• Battery-powered systems requiring minimal standby current
• Threshold detectors for voltage monitoring
• Window comparators for undervoltage and overvoltage protection
• Oscillator circuits utilizing internal reference stability

Comparators Procurement Notes

Verify the specific suffix 'T' indicates tape-and-reel packaging configuration when ordering. Confirm that the 'E' designation corresponds to the extended temperature range of -40°C to +85°C. Ensure compatibility with 8-pin SO footprint dimensions during PCB layout. Cross-reference the manufacturer's latest datasheet revision for any updates to absolute maximum ratings or electrical characteristics prior to final design approval.

Comparators Selection Notes

Select this component for applications demanding low supply current alongside robust output drive capabilities. The integrated reference eliminates the need for external voltage sources, simplifying circuit design. Consider the programmable hysteresis feature for noise immunity in threshold detection scenarios. Verify that the input common-mode range extending to the negative rail meets system signal requirements.

Comparators Part Context

This part belongs to the MAX921–MAX924 family of ultra-low-power, single/dual-supply comparators manufactured by Analog Devices / Maxim Integrated. The family includes single, dual, and quad configurations sharing similar electrical characteristics and pinout architectures where applicable. The MAX921 specifically denotes the single-channel variant within this series.

Comparators Replacement Considerations

Consult official documentation for direct substitutes. No confirmed public substitute part numbers are available in the provided source material.