Analog Devices Inc./Maxim Integrated MAX923ESA+T

Overview

The MAX923ESA+T from Maxim Integrated is a dual, ultra-low-power comparator with internal 1.182V ±1% bandgap reference and programmable hysteresis via HYST pin. It operates from +2.5V to +11V single supply (or ±1.25V to ±5.5V dual supply), draws ≤6µA quiescent current over –40°C to +85°C, and delivers TTL/CMOS-compatible outputs sourcing up to 40mA. It is used in battery-powered threshold detection and window comparator circuits where precision, low power, and rail-to-rail input range are critical.

For engineers reviewing the MAX923ESA+T datasheet, MAX923ESA+T pinout, MAX923ESA+T application, or MAX923ESA+T equivalent, key selection considerations include its dual-comparator architecture with shared reference and hysteresis control, guaranteed operation across industrial temperature range, and SO-8 package compatibility with standard PCB footprints for space-constrained portable systems.

Technical Context

The MAX923ESA+T integrates two independent comparators sharing a single precision 1.182V reference and a dedicated HYST pin enabling adjustable hysteresis without external feedback. Its input common-mode range extends from V– to (V+ – 1.3V), supporting operation near supply rails - critical for low-voltage sensing in 3V systems.

Each comparator features a unique output stage that continuously sources up to 40mA while eliminating crowbar current during transitions, minimizing parasitic supply feedback and improving stability in poorly decoupled layouts. Propagation delay is 12µs (typ.) at 10mV overdrive, with input offset voltage ≤±10mV and input leakage ≤±5nA over temperature.

Key Specifications

Pinout & Package

MAX923ESA+T is housed in an 8-pin SO (Small Outline) package, 3.9mm × 4.9mm body, 1.27mm pitch, JEDEC MS-012AC compliant. Pin 1 is marked with dot or notch; pin numbering follows standard SO convention (counterclockwise from mark).

Key Features

Applications

Equivalent & Alternatives

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

Compared with LM393DR and TLV3702IDR, the MAX923ESA+T uniquely integrates reference, hysteresis control, and high-current push-pull outputs in one SO-8 package - reducing total solution size, component count, and design validation effort for industrial and portable threshold-detection systems.

Availability

MAX923ESA+T is available at Aetrix Electronics and suitable for battery-powered systems, threshold detectors, and window comparators requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MAX923ESA+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 industrial, automotive, and computing applications, emphasizing low power, high accuracy, and integration.

The MAX921–MAX924 family was engineered specifically for micropower sensing and monitoring in space- and energy-constrained systems - delivering reference, hysteresis, and robust output drive in minimal footprint.

FAQ

What is the operating temperature range for the MAX923ESA+T?

The MAX923ESA+T is rated for –40°C to +85°C (industrial temperature range). This is confirmed in the Ordering Information table, where "ESA" suffix denotes the extended temperature grade. All electrical specifications - including supply current ≤6µA, reference accuracy ±1%, and propagation delay - are guaranteed across this full range.

Does the MAX923ESA+T require external components to implement hysteresis?

Yes, but minimally: only two resistors (R1 between REF and HYST, R2 between HYST and V–) are needed. The MAX923ESA+T's HYST pin enables precise, temperature-stable hysteresis without feedback loops or complex calculations - unlike alternatives requiring op-amps or discrete networks. No capacitor or additional IC is required.

Can the MAX923ESA+T operate from a 3V single supply?

Yes. The MAX923ESA+T supports single-supply operation from +2.5V to +11V, fully covering 3V systems. At V+ = 3V and V– = GND, it maintains guaranteed performance: input common-mode range from 0V to 1.7V, 12µs propagation delay (10mV overdrive), and ≤6µA supply current - making it ideal for coin-cell or LiFePO₄-powered devices.

What is the maximum continuous output source current of the MAX923ESA+T?

The MAX923ESA+T delivers up to 40mA continuous source current per output (OUTA or OUTB), as specified in the General Description and Typical Operating Characteristics. This is validated across temperature and supply conditions, enabling direct drive of LEDs, small solenoids, or logic inputs without external buffers - a key differentiator versus standard comparators.

Is the internal reference of the MAX923ESA+T referenced to GND or V–?

The internal 1.182V reference (pin 3, REF) is referenced to V–, not GND. When using single-supply operation (V– = GND), REF = 1.182V relative to GND. In dual-supply configurations (e.g., V+ = +5V, V– = –5V), REF = 1.182V above V– (i.e., –3.818V relative to GND). This is explicitly stated in the Pin Descriptions and Detailed Description sections.