MAX903ESA+T

Overview

The MAX903ESA+T is a high-speed, low-power voltage comparator manufactured by Analog Devices Inc./Maxim Integrated. It features differential analog inputs and TTL-logic outputs with active internal pull-ups. The device includes independent TTL-compatible latch inputs to hold output states when driven low. It supports separate analog and digital power supplies or a single combined supply, with an analog input common-mode range that includes the negative rail for ground sensing. Typical propagation delay is 8ns at 5mV overdrive, and power consumption is 18mW per comparator at +5V.

Feature Summary

• Features fast propagation delay of 8ns typical at 5mV overdrive for high-speed data discrimination.
• Includes independent TTL-compatible latch inputs to capture and hold comparator output states.
• Supports flexible analog supply ranging from +5V to +10V or ±5V with separate digital supply.
• Analog input common-mode range extends to the negative supply rail, enabling ground sensing.

Applications

• High-speed A/D converters
• Line receivers
• Voltage-to-frequency (V/F) converters
• Threshold detectors
• Input trigger circuitry

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm RoHS compliance status and check for Not Recommended for New Designs (NRND) status in current documentation. Ensure the SOIC package matches design requirements. Review datasheet revisions for any parameter updates before finalizing procurement specifications.

Selection Notes

Select this part for applications requiring fast response times and latch functionality. Consider the MAX9201/MAX9202/MAX9203 series for newer designs offering pin-for-pin compatibility with reduced power dissipation. Verify supply voltage ranges match system constraints. Ensure layout guidelines for decoupling and ground planes are followed to maintain performance.

Part Context

The MAX903 is part of the MAX900–MAX903 family of high-speed, low-power voltage comparators. This family provides single, dual, and quad configurations with identical electrical characteristics. The MAX903 specifically integrates four comparators within a single 8-pin package. These devices are designed for data-discrimination applications where speed and low power consumption are critical.

Replacement Considerations

The MAX900–MAX903 are not recommended for new designs due to process availability issues. Maxim suggests the MAX9201/MAX9202/MAX9203 as replacements, which offer pin-for-pin compatibility and half the power dissipation while maintaining similar speed characteristics.