Analog Devices Inc./Maxim Integrated MAX924CSE

Overview

The MAX924CSE from Maxim Integrated is a quad micropower comparator with integrated 1.182V ±1% bandgap reference, operating from +2.5V to +11V (or ±1.25V to ±5.5V), consuming only 6.5µA typical supply current at +25°C and featuring TTL/CMOS-compatible outputs that source up to 40mA. It is designed for battery-powered threshold detection, window monitoring, and low-power oscillator circuits where rail-to-rail input range (V− to V+ − 1.3V) and stable reference accuracy are critical.

For engineers reviewing the MAX924CSE datasheet, MAX924CSE pinout, MAX924CSE application, or MAX924CSE equivalent, this page delivers verified technical context, exact pin functions per 16-pin narrow SO package, confirmed quiescent current vs. temperature behavior, reference output stability over load, and real-world substitution guidance - all grounded in Maxim's official 19-0115 Rev 7 datasheet.

Technical Context

The MAX924CSE integrates four independent comparators sharing a single precision 1.182V reference referenced to V−, with no internal hysteresis - requiring external positive feedback for hysteresis implementation. Its output stage sources up to 40mA continuously and sinks >5mA without crowbar current, eliminating supply-line glitches during transitions.

Input common-mode range extends from V− to (V+ − 1.3V); inputs tolerate ±0.3V beyond rails. The device supports true dual-supply operation (±1.25V to ±5.5V) with separate V− and GND pins, enabling bipolar signal monitoring while maintaining TTL-compatible output swing (V+ to GND).

Key Specifications

Pinout & Package

MAX924CSE is housed in a 16-pin narrow SO (Small Outline) package, 3.9mm wide, with standard 0.050" lead pitch and gull-wing leads. Pin 1 is marked by a beveled corner or dot; pin numbering follows JEDEC MS-012 standard.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LM339DR and TLV3704IPW, the MAX924CSE uniquely combines integrated ±1% reference, 40mA sourcing, and sub-10µA quiescent current - making it the only option for compact, self-calibrating, high-drive quad threshold detection in space-constrained battery systems.

Availability

MAX924CSE is available at Aetrix Electronics and suitable for battery-powered systems, threshold detectors, window comparators, and oscillator circuits requiring stable component supply, long-term lifecycle support, and guaranteed commercial-temperature-grade performance (0°C to +70°C).

Supply support for MAX924CSE 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, medical, and communications markets.

The MAX921–MAX924 family was engineered specifically for ultra-low-power, single/dual-supply comparator applications demanding integrated reference accuracy, rail-swing inputs, and robust output drive - targeting portable instrumentation and energy-sensitive embedded control.

FAQ

What is the maximum supply voltage for MAX924CSE in single-supply operation?

The MAX924CSE supports a maximum single-supply voltage of +11V, with guaranteed operation from +2.5V to +11V. When used with V− tied to GND, the device maintains full functionality including reference output stability and comparator accuracy across this range, as specified in the Absolute Maximum Ratings and Electrical Characteristics tables of Maxim's 19-0115 Rev 7 datasheet.

Does MAX924CSE include internal hysteresis?

No, the MAX924CSE does not include internal hysteresis. Unlike the MAX921 and MAX923, the MAX924 requires external positive-feedback resistor networks to implement hysteresis - as detailed in Figure 4 and the Applications Information section of the datasheet. This design choice preserves flexibility in hysteresis magnitude and allows independent tuning per comparator channel.

Can MAX924CSE operate from a ±5V dual supply?

Yes, the MAX924CSE operates from ±1.25V to ±5.5V dual supplies. With V+ = +5V and V− = −5V, the internal 1.182V reference remains referenced to V− (i.e., −5V + 1.182V = −3.818V), and comparator inputs accept signals from −5V to +3.7V. Outputs swing from +5V to GND, enabling direct TTL interfacing while monitoring bipolar analog signals.

What is the output voltage swing of MAX924CSE?

The MAX924CSE outputs swing from V+ to GND - not V+ to V− - due to its dedicated GND pin (Pin 14) and output-stage architecture. At I_OUT = 1.8mA (commercial temp range), V_OH ≥ V+ − 0.4V and V_OL ≤ GND + 0.4V, ensuring reliable TTL/CMOS logic compatibility when V+ = +5V ±10%.

How does the internal reference of MAX924CSE differ from that of MAX921?

The MAX924CSE shares the same 1.182V ±1% bandgap reference as the MAX921, with identical accuracy, temperature drift (±0.01V over 0°C to +70°C), and load capability (25µA source / 15µA sink). The key difference is functional integration: MAX924CSE routes REF to Pin 8 for use by all four comparators, whereas MAX921 dedicates REF to its single comparator - both maintain identical electrical specifications per Maxim's datasheet Rev 7.