Analog Devices Inc./Maxim Integrated MAX932CSA

Overview

MAX932CSA from Maxim Integrated is a dual micropower 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 requiring ultra-low quiescent current (≤4µA) and rail-to-rail input range down to V−.

For engineers reviewing the MAX932CSA datasheet, MAX932CSA pinout, MAX932CSA application, or MAX932CSA equivalent, key selection criteria include its dual-comparator architecture with shared reference, HYST-controlled hysteresis without external feedback, 12µs propagation delay at 10mV overdrive, and compatibility with 0°C to +70°C commercial temperature range in 8-pin plastic DIP package.

Technical Context

The MAX932CSA integrates two independent comparators sharing a single internal 1.182V reference and one HYST terminal for simultaneous hysteresis programming across both channels. Its output stage eliminates crowbar current during transitions, enabling stable operation without bypass capacitors even under high-impedance supply conditions.

Input common-mode range extends from V− to (V+ − 1.3V), supporting single-supply operation with inputs referenced to ground while maintaining full functionality. The HYST pin accepts voltages from (REF − 50mV) to REF, enabling precise hysteresis bands up to 100mV using two external resistors.

Key Specifications

Pinout & Package

MAX932CSA is housed in an 8-pin plastic DIP package rated for 0°C to +70°C operation. Pin assignments are validated per Maxim's official datasheet revision 1 (19-0194).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX932ESA, the MAX932CSA offers identical electrical performance but trades extended temperature support for lower cost and through-hole assembly compatibility; compared with MAX922CSA, it delivers integrated reference and simplified hysteresis at the expense of pin compatibility and reference accuracy.

Availability

MAX932CSA is available at Aetrix Electronics and suitable for battery-powered systems, threshold detectors, window comparators, and oscillator circuits requiring stable component supply with long-term obsolescence management.

Supply support for MAX932CSA 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 MAX931–MAX934 family was engineered for ultra-low-power, cost-sensitive comparator applications requiring integrated reference and hysteresis-targeting portable instrumentation, battery monitoring, and supervisory circuits.

FAQ

What is the maximum supply voltage for MAX932CSA in single-supply operation?

The MAX932CSA supports a single-supply voltage range of +2.5V to +11V. When operated with V− tied to GND, the absolute maximum V+ is +11V. Exceeding this risks permanent damage, as specified in the Absolute Maximum Ratings table. The device remains fully functional across this range, including at 3V and 5V nominal supplies commonly used in portable electronics.

Does MAX932CSA require external bypass capacitors on its supply pins?

No, the MAX932CSA does not require external bypass capacitors due to its crowbar-free output architecture, which eliminates supply-line transients during switching. Bypassing is only recommended if the power supply impedance is high or supply leads are long; a 100nF ceramic capacitor suffices in such cases. The internal design inherently minimizes parasitic feedback, simplifying layout for space-constrained PCBs.

Can the internal reference of MAX932CSA be used to bias external circuitry?

Yes, the REF pin of MAX932CSA provides a 1.182V ±2% output referenced to V− and can source up to 15µA or sink up to 8µA. It is suitable for biasing external comparators, ADC references, or sensor excitation circuits within these current limits. Do not bypass REF externally, as this degrades noise performance and may cause instability per the datasheet guidance.

How is hysteresis implemented on both comparators in MAX932CSA?

Hysteresis in MAX932CSA is applied identically to both comparators using the single HYST pin. Connecting a resistor divider between REF and V− sets the HYST voltage, which determines the hysteresis band width (up to 100mV). This shared configuration ensures matched hysteresis thresholds without separate feedback networks, reducing component count and improving thermal tracking between channels.

What is the input voltage range specification for MAX932CSA when V− = GND?

When V− is connected to GND, the MAX932CSA input common-mode voltage range is specified from 0V (GND) to (V+ − 1.3V). For example, at V+ = 5V, inputs may swing from 0V to 3.7V. This rail-to-rail input capability enables direct interfacing with ground-referenced sensors and signal sources without level-shifting circuitry, preserving signal integrity and minimizing external components.