Analog Devices Inc./Maxim Integrated MAX941EPA+

Overview

The MAX941EPA+ from Maxim Integrated is a single high-speed comparator optimized for 3V/5V single-supply systems, featuring rail-to-rail inputs, 80ns propagation delay (5mV overdrive), 350μA supply current per comparator, and internal latch/shutdown functions. It operates across –40°C to +85°C and is used in battery-powered threshold detection and zero-crossing circuits where low power and fast response are critical.

For engineers reviewing the MAX941EPA+ datasheet, MAX941EPA+ pinout, MAX941EPA+ application, or MAX941EPA+ equivalent, key selection criteria include its guaranteed –40°C to +85°C industrial temperature range, latch-enabled output storage, shutdown current <60μA, and compatibility with CMOS/TTL logic without external pullups.

Technical Context

The MAX941EPA+ implements a bipolar input stage with back-to-back diode protection enabling rail-to-rail common-mode input range (–0.3V to V+ + 0.3V) and tolerance of continuous short-circuit faults to either supply rail. Its internal hysteresis (1mV typical input-referred width) eliminates need for external feedback resistors and ensures clean switching with slow-moving inputs.

It integrates two digital control pins-SHDN and LATCH-each with high-impedance CMOS-compatible thresholds (VIH = V+/2 + 0.4V, VIL = V+/2 – 0.4V). Shutdown disables the comparator core and forces output into high-impedance state, while latch holds the last valid comparison result when LATCH is driven low.

Key Specifications

Pinout & Package

MAX941EPA+ is housed in an 8-pin plastic DIP (PDIP) package with 0.3-inch body width and through-hole mounting. Pin 1 is top-left corner (notch side), with standard dual-in-line pin numbering.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-speed comparator applications.

Compared with LM311DR and TLV3501CDR, the MAX941EPA+ uniquely combines industrial temperature rating, sub-1mA supply current, rail-to-rail inputs, and dual digital controls (latch + shutdown) in a single 8-pin DIP - making it optimal for space-constrained, battery-sensitive, and fault-tolerant embedded systems.

Availability

MAX941EPA+ is available at Aetrix Electronics and suitable for battery-powered systems, industrial zero-crossing detectors, and 3.3V/5V threshold discriminators requiring stable component supply across extended temperature ranges.

Supply support for MAX941EPA+ 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 semiconductor company specializing in precision analog, mixed-signal, and high-performance power management ICs for industrial, communications, and consumer applications.

The MAX941EPA+ belongs to Maxim's high-speed comparator product line, designed specifically for low-power, rail-to-rail, single-supply operation in portable and harsh-environment systems where reliability and feature integration are critical.

FAQ

What is the operating temperature range of the MAX941EPA+?

The MAX941EPA+ is rated for –40°C to +85°C, meeting industrial temperature requirements. This range is confirmed in the Ordering Information table and Absolute Maximum Ratings section, where "E" suffix denotes the –40°C to +85°C grade. The device maintains specified propagation delay, offset voltage, and supply current performance across this full range.

Does the MAX941EPA+ require external pull-up resistors on its output?

No, the MAX941EPA+ does not require external pull-up resistors. Its output stage actively pulls high to within 0.2V of V+ (at 400μA) and low to 0.4V above GND (at 4mA), satisfying TTL and CMOS logic thresholds directly. This rail-to-rail output swing is explicitly specified in the Electrical Characteristics table under VOH and VOL parameters.

How does the latch function operate in the MAX941EPA+?

In the MAX941EPA+, the LATCH pin controls output transparency: when LATCH is high, the output follows the comparator decision in real time; when LATCH is driven low, the current output state is stored and held regardless of subsequent input changes. Timing parameters-including 20ns setup and 30ns hold times-are guaranteed over the full –40°C to +85°C range.

What is the maximum supply voltage the MAX941EPA+ can withstand?

The MAX941EPA+ has an absolute maximum supply voltage (V+ to GND) of +6.5V, as stated in the Absolute Maximum Ratings table. Operation is specified from 2.7V to 5.5V; exceeding 5.5V may cause increased supply current or parametric shift, though damage occurs only beyond +6.5V. Decoupling is mandatory at V+ to ensure stability at all valid supply voltages.

Can the MAX941EPA+ inputs safely handle voltages outside the supply rails?

Yes, the MAX941EPA+ inputs tolerate common-mode voltages from –0.3V to V+ + 0.3V, as defined in Absolute Maximum Ratings. This rail-overdrive capability is enabled by internal 4.1kΩ series resistors and back-to-back clamp diodes, allowing safe interface with sensors or transformers whose outputs exceed V+ or drop below GND without damage or false output inversion.