MAX9144ESD

Overview

The MAX9144ESD is a quad high-speed comparator from the MAX914x family, manufactured by Analog Devices Inc./Maxim Integrated. It operates on a single supply voltage ranging from 2.7V to 5.5V and features rail-to-rail input voltage capability extending beyond both power-supply rails. The device provides CMOS/TTL-compatible outputs that pull to within 0.3V of either supply rail without external pullup circuitry. Key electrical parameters include a maximum propagation delay of 40ns at 10mV overdrive, a typical supply current of 150µA per comparator at 3V, and an internal hysteresis of 1.5mV. It is housed in a 14-pin SO package.

Feature Summary

• Quad configuration with four independent comparators in a single package
• Rail-to-rail input voltage range extending beyond supply rails
• CMOS and TTL logic compatible outputs without external pullups
• Internal fixed hysteresis for clean switching

Applications

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

Procurement Notes

Verify the specific ordering suffix against official documentation to confirm package type and RoHS compliance status. Ensure the component matches the required temperature grade (E-grade for -40°C to +85°C) for your application environment. Cross-reference the manufacturer part number with authorized distributors to confirm authenticity and availability.

Selection Notes

Select this component when a quad comparator solution is required for 3V or 5V systems. It serves as a direct upgrade to industry-standard comparators like the MAX944, offering higher speed and lower power consumption. Consider the 14-pin SO package constraints and ensure adequate PCB layout practices, such as low-inductance grounding and close decoupling, are implemented to maintain performance.

Part Context

The MAX9144ESD belongs to the MAX914x series of single-supply comparators designed for portable equipment. This family includes single (MAX9140), dual (MAX9142), and quad (MAX9144) variants. The E-grade designation indicates operation over the industrial temperature range of -40°C to +85°C. The 'SD' suffix specifically denotes the 14-pin Small Outline package.

Replacement Considerations

The datasheet identifies the MAX944 as an industry-standard comparator that the MAX9144 upgrades. Designers replacing legacy parts should verify pin compatibility and electrical parameter differences, particularly regarding propagation delay and supply current specifications.