MAX9144ESD+

Overview

The MAX9144ESD+ is a quad high-speed comparator optimized for 3V and 5V single-supply systems. It features rail-to-rail inputs, allowing the common-mode voltage range to extend beyond both power-supply rails. The device delivers a propagation delay of 40ns with a supply current of 150μA per comparator. Outputs swing within 300mV of either supply rail without external pullup circuitry, ensuring compatibility with CMOS and TTL logic. Internal hysteresis ensures clean switching, and all pins tolerate continuous short-circuit faults.

Feature Summary

• Rail-to-rail input voltage range extending beyond supply rails
• Internal hysteresis for noise immunity and clean output switching
• CMOS and TTL-compatible outputs pulling close to supply rails
• Continuous short-circuit fault tolerance on all input and output pins

Applications

• Line Receivers
• Threshold Detectors/Discriminators
• Zero-Crossing Detectors
• Sampling Circuits

Procurement Notes

Verify the specific suffix 'ESD+' indicates a lead-free/RoHS-compliant package in the 14-pin SO format. Confirm the E-grade temperature rating (-40°C to +85°C) matches system requirements. Ensure the quad configuration aligns with channel needs, as other variants offer single or dual channels.

Selection Notes

Select this component when multiple comparators are required in a compact space. The quad architecture reduces board area compared to discrete single units. Verify that the 40ns propagation delay meets timing constraints and that the 150μA quiescent current fits low-power design goals.

Part Context

This part belongs to the MAX914x family of high-speed, low-power comparators. It serves as an upgrade to industry-standard parts like the MAX944, offering higher speed and lower power consumption. The family includes single (MAX9140), dual (MAX9142), and quad (MAX9144) versions with varying pin counts and packages.

Replacement Considerations

The datasheet identifies the MAX944 as a legacy standard comparator that this device upgrades. Designers replacing older MAX944 designs should verify pinout compatibility and ensure the new internal hysteresis characteristics do not affect existing threshold detection circuits.