MAX903EPA+

Overview

The MAX903EPA+ is a high-speed, low-power voltage comparator housed in an 8-pin Plastic DIP package. It features differential analog inputs and TTL-logic outputs with active internal pull-ups. The device supports separate analog and digital power supplies or a single combined supply. Key electrical parameters include a typical propagation delay of 8ns at 5mV overdrive, input offset voltage up to 4mV, and input bias current up to 10µA. Power consumption is typically 18mW per comparator when powered from +5V.

Feature Summary

• Features independent TTL-compatible latch inputs to hold output states when driven low.
• Supports flexible analog supply ranges including +5V to +10V or ±5V configurations.
• Analog input common-mode range includes the negative rail for ground sensing.
• Provides TTL-compatible outputs optimized for driving low-power Schottky TTL loads.

Applications

• High-speed A/D converters
• Line receivers
• Voltage-to-frequency (V/F) converters
• Data-discrimination circuits

Procurement Notes

Verify that the specific MAX903EPA+ variant matches the required temperature range (-40°C to +85°C). Confirm pinout compatibility if replacing older non-plastic DIP versions. Ensure design accounts for separate decoupling of analog VCC and digital VDD pins to maintain signal integrity. Check datasheet for absolute maximum ratings regarding supply voltages and latch input levels before integration.

Selection Notes

Select this component for applications requiring fast response times with low power dissipation. The inclusion of latch functionality distinguishes it from the MAX901. Consider the MAX920x series for newer designs offering similar speed with reduced power consumption. Verify that the TTL output drive capability meets the fan-out requirements of the downstream logic circuitry.

Part Context

The MAX903EPA+ belongs to the MAX900–MAX903 family of high-speed comparators manufactured by Analog Devices Inc./Maxim Integrated. This family includes single, dual, and quad variants with varying latch capabilities. The MAX903 specifically provides one comparator channel with latch functionality in an 8-pin package, suitable for space-constrained designs requiring precise threshold detection.

Replacement Considerations

The MAX903CSA is listed as a direct replacement option. For newer designs, the MAX9201/MAX9202/MAX9203 series offers pin-for-pin compatibility with half the power dissipation. Consult technical support for industry second-source availability if Maxim production is discontinued.