Analog Devices Inc./Maxim Integrated MAX934ESE+T

Overview

The MAX934ESE+T from Maxim Integrated is a quad micropower comparator with integrated 1.182V ±2% bandgap reference, designed for ultra-low-power single- or dual-supply systems. It delivers <4µA quiescent current over –40°C to +85°C, supports supply voltages from +2.5V to +11V (or ±1.25V to ±5.5V), and features TTL/CMOS-compatible outputs capable of sourcing up to 40mA - ideal for battery-powered threshold detection and window monitoring.

For engineers reviewing the MAX934ESE+T datasheet, MAX934ESE+T pinout, MAX934ESE+T application, or MAX934ESE+T equivalent, key selection considerations include its quad-comparator architecture with independent inputs/outputs, internal reference referenced to V− (not GND), guaranteed operation down to 2.5V supply, and compatibility with MAX924 for higher-precision alternatives.

Technical Context

The MAX934ESE+T integrates four independent comparators and a shared 1.182V ±2% reference output referenced to V−. Each comparator features rail-to-rail input range (V− to V+ − 1.3V) and outputs that swing from V+ to GND - unlike MAX932/MAX933, which swing V+ to V−. Its unique output stage eliminates crowbar current during transitions, minimizing parasitic supply feedback and enabling stable operation without tight layout constraints.

Hysteresis is implemented externally via positive feedback (e.g., R1/R2 networks on each comparator's IN+/IN−), distinct from the dedicated HYST pin used in MAX931–MAX933. The device operates across extended temperature (–40°C to +85°C) and supports low-voltage operation down to 2.5V, though reference functionality degrades below ~2.2V while comparator action persists down to 1V.

Key Specifications

Pinout & Package

MAX934ESE+T is housed in a 16-pin SO (Small Outline) package with 1.27mm pitch, rated for –40°C to +85°C operation. Pin 14 is GND (tied to V− for single-supply use); pins 9 and 14 provide separate V− and GND connections to support dual-supply configurations while maintaining TTL-compatible output swing (V+ to GND).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX924ESE+, the MAX934ESE+T trades 1% reference accuracy for lower cost and marginally lower quiescent current, while TLV3704IPW eliminates the reference entirely to achieve nanoamp-level power - making MAX934ESE+T the balanced choice for integrated, low-cost, industrial-grade threshold detection.

Availability

MAX934ESE+T is available at Aetrix Electronics and suitable for battery-powered systems, threshold detectors, and window comparators requiring stable component supply across industrial temperature ranges and long product lifecycles.

Supply support for MAX934ESE+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 power management, sensing, and interface applications in industrial, automotive, and communications markets.

The MAX931–MAX934 family targets ultra-low-power, cost-sensitive comparator applications requiring integrated reference and robust operation across wide supply and temperature ranges - especially in portable and remote sensing systems.

FAQ

What is the reference voltage accuracy and temperature drift of the MAX934ESE+T?

The MAX934ESE+T features an internal 1.182V bandgap reference with ±2% initial accuracy over 0°C to +70°C. Over the full –40°C to +85°C operating range, output varies from 1.147V to 1.217V. This reference is referenced to V−, not GND, so its absolute voltage at the REF pin depends on the V− potential. The MAX934ESE+T reference is unbuffered and must not be bypassed.

Can the MAX934ESE+T operate from a single 3V supply?

Yes, the MAX934ESE+T is fully specified for single-supply operation from +2.5V to +11V. At +3V, it draws <6µA quiescent current, maintains input common-mode range from V− (GND) to V+ − 1.3V (1.7V), and delivers functional output swing from V+ to GND. The reference remains active above ~2.2V, though comparator performance (e.g., propagation delay) degrades gradually below 2.5V.

How is hysteresis implemented on the MAX934ESE+T compared to MAX931–MAX933?

Unlike MAX931–MAX933, which use a dedicated HYST pin for simple resistor-programmed hysteresis, the MAX934ESE+T requires external positive feedback (e.g., resistors between OUTx and IN+x) for each comparator. This method draws more current and yields slower hysteresis response but provides independent control per channel. The MAX934ESE+T does not have a HYST pin.

What is the maximum continuous output source current of the MAX934ESE+T?

The MAX934ESE+T output stage continuously sources up to 40mA per channel into V+ while maintaining microamp-level quiescent current. This capability allows direct driving of LEDs, small solenoids, or logic inputs without external buffers. Short-pulse currents up to 100mA are possible at V+ = 5V, provided package power dissipation limits (330mW for SO at +70°C) are not exceeded.

Is the MAX934ESE+T pin-compatible with any higher-precision alternatives?

Yes, the MAX934ESE+T is pin-compatible with the MAX924ESE+, which offers identical pinout, package, and electrical interface but upgrades the internal reference to ±1% accuracy. This allows drop-in replacement where tighter reference tolerance is required - though MAX924ESE+ draws slightly higher quiescent current (~5µA) and carries a premium cost.