Analog Devices Inc./Maxim Integrated MAX9077ESA-T

Overview

MAX9077ESA-T from Maxim Integrated is a dual, rail-to-rail input/output, ultra-low-power comparator optimized for single-supply portable systems. It delivers 580ns propagation delay at just 3µA per comparator, operates from 2.1V to 5.5V, and features ground-sensing inputs with -0.2V to V_CC–1.2V common-mode range - enabling use in battery voltage monitoring and IR receiver front-ends.

For engineers reviewing the MAX9077ESA-T datasheet, MAX9077ESA-T pinout, MAX9077ESA-T application, or MAX9077ESA-T equivalent, key selection criteria include its 3µA supply current, rail-to-rail output swing into 2mA loads, absence of differential input clamping, and SO-8 package compatibility with space-constrained industrial and automotive sensor interfaces.

Technical Context

The MAX9077ESA-T integrates two independent comparators sharing a common 2.1V–5.5V supply. Each channel uses a BiCMOS input stage with no internal differential clamp, allowing rail-to-rail differential input voltage (±V_CC) while maintaining -0.2V to V_CC–1.2V common-mode range - critical for ground-referenced threshold detection.

Its push-pull output stage delivers rail-to-rail swing with ±2mA drive capability and suppresses shoot-through current during switching, limiting dynamic supply surges. Input offset voltage is ±8mV max over temperature, and propagation delay remains stable across V_CC (2.1V/3V/5V) and temperature (-40°C to +85°C).

Key Specifications

Pinout & Package

MAX9077ESA-T is housed in an 8-pin SO (Small Outline) package, 3.9mm × 4.9mm footprint, 1.75mm height, with gull-wing leads compatible with standard reflow profiles. Pin 1 marked by notch or dot.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual comparator applications.

Compared with MAX9077ESA-T, LMV393IDR trades speed and input flexibility for lower unit cost, while TLV3702CDR prioritizes ultra-low current over timing performance - making MAX9077ESA-T optimal for battery-powered systems needing both speed and ground-referenced sensing.

Availability

MAX9077ESA-T is available at Aetrix Electronics and suitable for battery-powered systems, IR receivers, and digital line receivers requiring stable component supply, RoHS-compliant packaging, and guaranteed -40°C to +85°C operation.

Supply support for MAX9077ESA-T includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Maxim Integrated (now part of Analog Devices) is a U.S.-based semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, automotive, and communications markets.

The MAX9075/MAX9077 family was designed specifically for ultra-low-power, space-constrained portable electronics - emphasizing single-supply operation, minimal quiescent current, and robust input stage architecture for harsh real-world signal conditions.

FAQ

What is the maximum supply voltage rating for MAX9077ESA-T?

The absolute maximum supply voltage for MAX9077ESA-T is 6V between V_CC and GND. Operation beyond this risks permanent damage. The recommended operating range is 2.1V to 5.5V, with full electrical specifications guaranteed across that span. Exceeding 6V, even momentarily, may degrade or destroy the internal BiCMOS structure of MAX9077ESA-T.

Does MAX9077ESA-T require external pull-up resistors on its outputs?

No, MAX9077ESA-T does not require external pull-up resistors. Its outputs are push-pull (not open-drain), capable of actively driving high to V_CC and low to GND with ±2mA capability. This eliminates pull-up dependencies and reduces BOM count - a key advantage over open-drain comparators when interfacing directly with CMOS/TTL loads in MAX9077ESA-T applications.

Can MAX9077ESA-T operate with input voltages below ground?

Yes, MAX9077ESA-T supports input voltages as low as -0.2V relative to GND, confirmed in its common-mode voltage range specification (-0.2V to V_CC–1.2V). This ground-sensing capability allows direct connection to transducers or sensors whose outputs swing slightly negative, without level-shifting circuitry - a verified feature of MAX9077ESA-T's input stage design.

What is the typical propagation delay variation of MAX9077ESA-T across temperature?

Over the full -40°C to +85°C range, MAX9077ESA-T propagation delay varies from 520ns to 650ns (typ), based on characterization curves in the datasheet (Figures toc16–toc18). At +25°C and V_CC = 5V, t_PD is 580ns; it decreases slightly at colder temperatures and increases modestly at elevated temperatures - a stable profile critical for timing-critical MAX9077ESA-T deployments.

Is MAX9077ESA-T pin-compatible with other packages of the same part number?

MAX9077ESA-T (SO-8) shares identical pinout and functionality with MAX9077EKA+T (SOT23-8) and MAX9077EUA+ (µMAX), as confirmed in the "Pin Description" and "Pin Configurations" sections of the datasheet. All three variants use the same 8-pin assignment: OUTA, INA−, INA+, GND, V_CC, INB+, INB−, OUTB - enabling direct PCB footprint substitution where space and thermal constraints permit.