MAX9144ESD+T

Overview

The MAX9144ESD+T is a quad high-speed comparator optimized for single-supply operation at 3V or 5V. It features a propagation delay of 40ns with a supply current of 150μA per channel. The device supports rail-to-rail input voltage ranges extending beyond the power rails and provides CMOS/TTL-compatible outputs that swing within 300mV of either supply rail. It includes internal hysteresis to ensure clean switching and tolerates continuous short-circuit faults.

Feature Summary

• Quad-channel architecture providing four independent comparators in a single package
• Rail-to-rail input capability allowing signal voltages to exceed supply rails without damage
• Internal fixed hysteresis eliminates external resistor requirements for noise immunity
• CMOS and TTL logic interface compatibility through push-pull output stages

Applications

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

Procurement Notes

Verify the specific suffix 'ESD' corresponds to the 14-pin SOIC package variant required for your design. Confirm the '+T' designation indicates tape and reel packaging if automated assembly is planned. Ensure the E-grade temperature range (-40°C to +85°C) meets your environmental specifications. Cross-reference the manufacturer part number against official Analog Devices databases to confirm current production status and availability.

Selection Notes

Select this component when multiple comparator channels are needed in a space-constrained design. It serves as a direct upgrade for legacy MAX944 applications requiring lower power consumption. Consider this part for portable systems due to its low quiescent current. Verify that the 40ns propagation delay aligns with your system timing requirements. Ensure the 300mV output swing is sufficient for your downstream logic levels.

Part Context

This device belongs to the MAX914x family of high-speed, low-power comparators manufactured by Analog Devices (formerly Maxim Integrated). The family includes single, dual, and quad variants sharing similar electrical characteristics. The MAX9144 specifically offers four channels in a 14-pin package, distinguishing it from the single-channel MAX9140 and dual-channel MAX9142.

Replacement Considerations

The datasheet identifies the MAX944 as an industry-standard comparator that this device upgrades. Designers replacing older MAX944 circuits should verify pinout compatibility and adjust for the lower supply current and different output drive characteristics.