Analog Devices Inc./Maxim Integrated MAX932ESA

Overview

MAX932ESA from Maxim Integrated is a dual micropower voltage comparator with integrated 1.182V ±2% bandgap reference, programmable hysteresis via HYST pin, TTL/CMOS-compatible outputs sourcing up to 40mA, and operation from +2.5V to +11V single supply (or ±1.25V to ±5.5V dual supply). It targets battery-powered threshold detection and window comparator circuits where ultra-low quiescent current (<4µA over temperature) and rail-to-rail input range (V− to V+ −1.3V) are critical.

For engineers reviewing the MAX932ESA datasheet, MAX932ESA pinout, MAX932ESA application, or MAX932ESA equivalent, key selection considerations include its dual-comparator architecture with shared reference and hysteresis control, guaranteed performance across 0°C to +70°C, µMAX-8 package footprint, and compatibility with low-voltage 3V/5V systems requiring stable hysteresis without external feedback networks.

Technical Context

The MAX932ESA implements two independent comparators sharing a single internal 1.182V reference and one HYST pin for simultaneous hysteresis programming on both channels. Its output stage eliminates crowbar current during transitions, preventing supply glitches and parasitic feedback-enabling stable operation even with suboptimal PCB layout.

Input common-mode range extends from V− to (V+ −1.3V), supporting operation near the positive rail; outputs swing from V+ to V− (not GND), requiring V− connection to ground for single-supply TTL compatibility. Propagation delay is 12µs typical at 10mV overdrive, with 20µV_RMS wideband noise and ±10mV input offset voltage.

Key Specifications

Pinout & Package

MAX932ESA is housed in an 8-pin µMAX package (3mm × 3mm, 0.8mm height), pin-compatible with SO-8 and PDIP-8 footprints but with reduced board area. The package operates from 0°C to +70°C and features exposed pad for thermal enhancement.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX932CSA, MAX932ESA offers identical performance in a space-saving µMAX package ideal for compact battery-powered devices; compared with MAX922ESA, it trades reference accuracy for lower power and simpler hysteresis implementation, making it optimal for cost-sensitive, ultra-low-power applications where ±2% tolerance is acceptable.

Availability

MAX932ESA is available at Aetrix Electronics and suitable for battery-powered systems, threshold detectors, and window comparators requiring stable component supply with guaranteed 0°C to +70°C operation and long-term production continuity.

Supply support for MAX932ESA 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, with emphasis on low-power, high-reliability solutions for industrial and portable electronics.

The MAX931–MAX934 family was engineered specifically for micropower comparator applications demanding integrated reference and programmable hysteresis-targeting battery-operated instrumentation, safety-critical alarms, and energy-harvesting systems.

FAQ

What is the operating temperature range for MAX932ESA?

The MAX932ESA is specified for 0°C to +70°C ambient operation. This commercial-grade temperature range aligns with its µMAX-8 packaging and is validated across all electrical parameters including supply current, reference voltage accuracy, and propagation delay. For extended-range alternatives, consider MAX932ESE (−40°C to +85°C) in SO-8 package. MAX932ESA remains fully functional within its rated range without derating.

Does MAX932ESA require external hysteresis components?

No-MAX932ESA includes a dedicated HYST pin enabling adjustable hysteresis using just two external resistors (R1 between REF and HYST, R2 between HYST and V−). This eliminates traditional positive-feedback networks and associated stability calculations. The hysteresis band is precisely controlled from 0 to 100mV, and applies identically to both comparators. No external hysteresis components are needed if HYST is tied directly to REF.

Can MAX932ESA operate from a 3V single supply?

Yes-MAX932ESA supports single-supply operation from +2.5V to +11V, including 3V nominal systems. At 3V, supply current remains below 3.0µA (typical), input common-mode range extends from V− to V+ −1.3V (i.e., 0V to 1.7V), and output high voltage reaches V+ −0.4V (2.6V min), ensuring robust TTL/CMOS interfacing. Performance metrics like propagation delay and reference stability are fully characterized down to 2.5V.

How is the reference voltage of MAX932ESA connected and used?

The MAX932ESA's 1.182V reference is output on pin 7 (REF) and is referenced to V− (pin 2), not GND. To use it, tie V− to system ground in single-supply configurations; then REF provides a stable 1.182V source relative to that ground. It can drive up to 15µA source / 8µA sink loads-sufficient for resistor-divider thresholds. Do not bypass REF with capacitors, as this degrades noise performance and may cause oscillation.

Is MAX932ESA pin-compatible with any other Maxim comparators?

MAX932ESA is pin-compatible with MAX932CSA (SO-8) and MAX932CPA (PDIP-8), differing only in package type. It is explicitly *not* pin-compatible with MAX922ESA (which lacks HYST pin and has different pin mapping) or MAX933/MAX934 variants. However, MAX932ESA shares functional equivalence with MAX932CUA (SO-8) and MAX932ESE (SO-8, extended temp), though package and temperature grade differ.