Analog Devices Inc./Maxim Integrated MAX924EPE+

Overview

MAX924EPE+ from Maxim Integrated is a quad micropower comparator with integrated 1.182V ±1% bandgap reference, operating from +2.5V to +11V single supply or ±1.25V to ±5.5V dual supply. It delivers 4μA typical quiescent current at +25°C, 12μs propagation delay (10mV overdrive), and TTL/CMOS-compatible outputs that source up to 40mA. Used in battery-powered threshold detection and window comparator circuits requiring ultra-low power and rail-to-rail input operation.

For engineers reviewing the MAX924EPE+ datasheet, MAX924EPE+ pinout, MAX924EPE+ application, or MAX924EPE+ equivalent, key selection criteria include guaranteed 4-comparator integration in 16-pin PDIP, internal reference accuracy across –40°C to +85°C, output swing from V+ to GND, and absence of internal hysteresis-requiring external resistor networks for hysteresis implementation.

Technical Context

The MAX924EPE+ implements four independent comparators sharing a common internal 1.182V reference referenced to V−, not GND. Each comparator features rail-to-rail input operation (V− to V+ − 1.3V) and outputs that sink/source current without crowbar glitches, eliminating parasitic supply feedback during transitions.

Unlike MAX921/MAX923, it lacks a dedicated HYST pin; hysteresis must be implemented externally via positive feedback resistors on each comparator's inputs. Its 16-pin PDIP package separates V− and GND pins, enabling true dual-supply operation while maintaining TTL-compatible output swing (V+ to GND).

Key Specifications

Pinout & Package

MAX924EPE+ is housed in a 16-pin plastic DIP (dual in-line package) with 0.3-inch body width and 0.1-inch lead pitch. Pin 1 is marked by a notch or dot; pin numbering follows standard counter-clockwise convention from top view.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LM339N and TLV3704IPW, MAX924EPE+ uniquely combines quad comparators, integrated ±1% reference, and 40mA output drive in a through-hole PDIP package-making it optimal for space-constrained, low-power industrial monitors where reference stability and direct load driving are mandatory.

Availability

MAX924EPE+ is available at Aetrix Electronics and suitable for battery-powered instrumentation, industrial power supervision, and portable sensor interface designs requiring stable component supply and long-term obsolescence support.

Supply support for MAX924EPE+ 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 industrial, medical, and communications applications.

The MAX921–MAX924 family was engineered specifically for ultra-low-power threshold detection in energy-constrained systems, emphasizing micropower operation, integrated references, and robust output drive without compromising speed or accuracy.

FAQ

What is the operating temperature range for MAX924EPE+?

The MAX924EPE+ is rated for –40°C to +85°C ambient operation. This extended temperature range is confirmed in the Ordering Information table, where "E" suffix denotes the –40°C to +85°C grade. All electrical specifications-including 1.182V ±1% reference voltage, 8.5μA max supply current, and 12μs propagation delay-are guaranteed across this full range.

Does MAX924EPE+ include internal hysteresis?

No, MAX924EPE+ does not include internal hysteresis. Unlike MAX921 and MAX923, the MAX924 has no HYST pin and relies on external positive-feedback resistor networks for hysteresis implementation. The datasheet explicitly states "MAX924: No" under the INTERNAL HYSTERESIS column and details external hysteresis design in Figure 4 and Applications Information section.

Can MAX924EPE+ operate from a single 3V supply?

Yes, MAX924EPE+ operates from a single +2.5V to +11V supply, so 3V is fully supported. At 3V, typical supply current is 5.2μA (TA = +25°C), input common-mode range extends from V− (0V) to 1.7V, and output swing remains V+ to GND (3V to 0V), ensuring compatibility with 3V logic families.

What is the purpose of separate V− and GND pins on MAX924EPE+?

The separate V− and GND pins enable true dual-supply operation (e.g., ±5V) while maintaining TTL-compatible output swing (V+ to GND). V− serves as the analog reference for the internal 1.182V bandgap and comparator inputs, while GND grounds the output driver stage-preventing output switching noise from modulating the reference or input thresholds.

Is the internal reference of MAX924EPE+ referenced to GND or V−?

The internal 1.182V reference of MAX924EPE+ is referenced to V−, not GND. This is explicitly stated in the Pin Descriptions ("REF: Reference output. 1.182V with respect to V−") and Detailed Description sections. Therefore, when using dual supplies (e.g., V+ = +5V, V− = –5V), REF = –5V + 1.182V = –3.818V, not 1.182V relative to system GND.