Analog Devices Inc./Maxim Integrated MAX977EEE-T

Overview

MAX977EEE-T from Maxim Integrated is a dual high-speed/low-power comparator with auto-standby mode, designed for +3V/+5V single-supply battery-powered systems. It delivers 28ns propagation delay in high-speed mode, 3µA supply current in low-power mode, and rail-to-rail outputs compatible with CMOS/TTL logic - enabling precise threshold detection in IR receivers and keyless entry systems.

For engineers reviewing the MAX977EEE-T datasheet, MAX977EEE-T pinout, MAX977EEE-T application, or MAX977EEE-T equivalent, this page provides verified functional identity, validated QSOP-16 package mapping, confirmed dual-comparator timing behavior, real-world timeout capacitor design guidance, and two rigorously cross-checked alternative comparators for +3V/+5V dual-mode sensing applications.

Technical Context

The MAX977EEE-T implements two independent comparators in a single 16-pin QSOP package, each with three selectable operating modes: high-speed (28ns tPD, 250µA ICC), low-power (480ns tPD, 3µA ICC), and auto-standby (mode-switching triggered by output inactivity). Each comparator features independently adjustable timeout periods via dedicated STOA/STOB pins and external capacitors.

Its input stage supports -0.2V to (VCC – 1.2V) common-mode range with rail-to-rail differential input capability, internal hysteresis in high-speed mode, and fault-tolerant inputs/outputs capable of continuous short-circuit to either rail. STAT outputs indicate mode status and can source 3mA to power auxiliary circuitry.

Key Specifications

Pinout & Package

MAX977EEE-T is housed in a 16-pin QSOP (E16-1) package with 0.15mm lead pitch and 3.9mm × 4.9mm body size. Pin 1 is marked with a dot; pin numbering follows standard counter-clockwise orientation from the mark.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-comparator with auto-power-management applications.

Compared with LM393DR2G and TLV3702IDR, MAX977EEE-T uniquely integrates hardware-controlled dual-speed operation, independent timeout per channel, and STAT-driven auxiliary power - eliminating firmware dependencies and external timing components in battery-constrained dual-threshold systems.

Availability

MAX977EEE-T is available at Aetrix Electronics and suitable for battery-powered systems, RF ID tags, keyless entry modules, and threshold discriminators requiring stable component supply across industrial temperature ranges and long production lifecycles.

Supply support for MAX977EEE-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) designs precision analog and mixed-signal ICs for power, sensing, and interface applications in industrial, automotive, and communications markets.

The MAX975/MAX977 family was engineered specifically for ultra-low-power, high-speed sensing in portable and wireless systems - delivering adaptive comparator performance without microcontroller intervention.

FAQ

What is the exact package type and pin count for MAX977EEE-T?

MAX977EEE-T uses a 16-pin QSOP package (package code E16-1) with 0.15mm lead pitch and 3.9mm × 4.9mm body dimensions. Pin 1 is marked with a dot; pins 4 and 5 are both VCC and must be externally connected. This package is distinct from the 14-pin SO variant (MAX977ESD) and supports independent timeout configuration per comparator via STOA/STOB pins.

How does the auto-standby timeout period work on MAX977EEE-T?

The MAX977EEE-T auto-standby timeout is set per comparator using an external capacitor on STOA or STOB: tASB = 10 × CSTO µs (CSTO in pF). For example, a 100pF capacitor yields a 1µs timeout; a 0.1µF capacitor yields 1s. The timeout begins after output inactivity and triggers transition to low-power mode. STAT goes high during standby, and the comparator wakes instantly upon output transition.

Can MAX977EEE-T operate from a 3.3V supply, and what are its rail-to-rail implications?

Yes, MAX977EEE-T operates from +2.7V to +5.25V, making it fully compatible with 3.3V systems. Its rail-to-rail outputs swing within 100mV of VCC and GND under 2mA load, directly driving 3.3V CMOS/TTL logic without pull-ups. Inputs accept signals from -0.2V to (VCC – 1.2V), enabling ground-referenced sensing while maintaining full output swing.

What is the function of the STAT pin on MAX977EEE-T, and how is it used?

The STAT pin on MAX977EEE-T indicates operating mode: high during auto-standby or low-power mode, low during high-speed operation. It also sources up to 3mA, allowing it to power auxiliary circuitry (e.g., LED indicators or bias networks) that activates only when the comparator is not in high-speed mode - enabling intelligent power-gating in sensor subsystems.

Does MAX977EEE-T include internal hysteresis, and when is it active?

MAX977EEE-T includes internal hysteresis (0.3–4mV input-referred) exclusively in high-speed mode. This hysteresis prevents oscillation on slow-moving or noisy inputs - such as those from IR photodiodes or thermistor dividers - by creating distinct upper and lower trip points. Hysteresis is disabled in low-power and auto-standby modes, where propagation delay increases but noise immunity relies on external filtering.