MAX9077ESA+T

Overview

The MAX9077ESA+T is a dual-channel, low-cost, ultra-small single-supply comparator manufactured by Analog Devices Inc./Maxim Integrated. It operates within a supply voltage range of 2.1V to 5.5V and consumes only 3µA per comparator. The device features a propagation delay of 580ns, ground-sensing inputs with a common-mode range from -0.2V to VCC-1.2V, and rail-to-rail push-pull outputs capable of driving loads up to 2mA. It is housed in an 8-pin SO package and supports an operating temperature range of -40°C to +85°C.

Feature Summary

• Ultra-low power consumption of 3µA per channel enables extended battery life in portable applications.
• Rail-to-rail output swing with large internal drivers allows direct interface with TTL/CMOS logic without phase inversion.
• Ground-sensing inputs and absence of differential clamps allow full rail-to-rail differential input voltage operation.

Applications

• Battery-powered systems
• Threshold detectors and discriminators
• Keyless entry systems
• IR receivers
• Digital line receivers

Procurement Notes

Verify the specific ordering suffix '+T' indicates tape-and-reel packaging when sourcing components. Confirm that the 'E' designation corresponds to the industrial temperature range (-40°C to +85°C) rather than military specifications. Ensure compatibility with standard surface-mount reflow soldering profiles for lead-free RoHS-compliant packages during assembly.

Selection Notes

Select this component for designs requiring minimal quiescent current alongside fast response times in constrained spaces. The dual-channel configuration reduces board space compared to using two single comparators. Verify that the required load current does not exceed the 2mA drive capability and that the input signals remain within the specified common-mode voltage limits for optimal performance.

Part Context

This part belongs to the MAX9075/MAX9077 family of low-power comparators optimized for 3V and 5V single-supply environments. While the MAX9075 provides a single channel in smaller footprints like SC70, the MAX9077 offers dual channels in larger packages such as SOT23, µMAX, and SO. This family prioritizes low cost and small size for portable electronics.

Replacement Considerations

The MAX9077MSA/PR2 serves as a confirmed military-grade replacement offering an extended temperature range of -55°C to +125°C. Other variants within the same package type include the MAX9077EUA+ (µMAX) and MAX9077EKA+T (SOT23). Verify pinout compatibility before substituting across different package styles.

FAQ

Does the MAX9077 exhibit output phase inversion when inputs are overdriven?

No, the device is specifically designed to prevent output phase inversion even when inputs are overdriven beyond the supply rails.

What is the maximum continuous short-circuit tolerance for the inputs and outputs?

Both the inputs and outputs can tolerate a continuous short-circuit fault condition to either the ground or VCC rail.