Analog Devices Inc./Maxim Integrated MAX912ESE

Overview

The MAX912ESE from Maxim Integrated is a dual, ultra-fast, low-power precision TTL comparator with differential inputs and complementary TTL outputs, operating from single +5V or dual ±5V supplies. It delivers 10ns typical propagation delay, 0.8mV input offset voltage, and stable linear-region operation-enabling high-resolution zero-crossing detection and fast pulse discrimination in switching regulators and V/F converters.

For engineers reviewing the MAX912ESE datasheet, MAX912ESE pinout, MAX912ESE application, or MAX912ESE equivalent, this device is selected for high-speed analog-to-digital decision-making where latch control, rail-to-rail input range (–0.2V to +3.5V on single +5V), and absence of output oscillation during slow input transitions are critical design requirements.

Technical Context

The MAX912ESE integrates two independent comparators, each with fully differential bipolar input stages trimmed for <2mV offset at +25°C and common-mode input range extending 200mV below V−. Its latch-enable architecture (LEA/LEB) supports transparent or latched output modes without external logic.

Unlike conventional high-speed comparators, it eliminates need for hysteresis by maintaining stable output in the linear region-even with near-zero input slew rate-preserving resolution across low-frequency and DC-coupled signals while supporting up to 70MHz signal rates at 5mV overdrive.

Key Specifications

Pinout & Package

MAX912ESE is housed in a 16-pin narrow SO (SOICN) package, 3.9mm × 9.9mm body size, 1.27mm pitch, with exposed pad not present. Pin 1 is QA (Comparator A TTL output), pin 16 is QB (Comparator B TTL output). All GND pins (pins 3 and 14) must be connected to system ground; N.C. pins (5 and 12) are unconnected internally.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual high-speed comparator applications.

Compared with LM393DR and TLV3501CDR, the MAX912ESE uniquely combines TTL-compatible complementary outputs, independent latch enables, and linear-region stability-making it the only option among the three that supports jitter-free zero-crossing detection and synchronized dual-channel sampling without external components.

Availability

MAX912ESE is available at Aetrix Electronics and suitable for industrial switching regulators, Ethernet physical-layer receivers, and high-speed sampling circuits requiring stable component supply across extended temperature ranges.

Supply support for MAX912ESE 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) is a U.S.-based semiconductor company specializing in precision analog, mixed-signal, and high-speed interface ICs for industrial, communications, and computing markets.

The MAX912ESE belongs to Maxim's precision high-speed comparator product line, engineered specifically for applications demanding nanosecond decision latency, latch-controlled sampling, and stable operation without hysteresis-targeting power conversion, data acquisition, and wired communications systems.

FAQ

What supply voltages does the MAX912ESE support?

The MAX912ESE operates from a single +5V supply (V− connected to GND) or dual ±5V supplies. Absolute maximum ratings allow +7V on V+ and –7V on V−, but functional operation is specified only for +4.5V to +5.5V (V+) and –5V (V−). The MAX912ESE maintains full performance across its –40°C to +85°C operating range under these conditions.

Does the MAX912ESE require external hysteresis for stable operation?

No-the MAX912ESE is designed to remain stable in its linear region without external hysteresis. Its unique architecture prevents oscillation during slow-moving or near-zero-differential-input conditions, preserving resolution for low-frequency signals. Adding hysteresis degrades accuracy and is explicitly discouraged in the MAX912ESE datasheet.

How are the latch-enable pins (LEA/LEB) used in the MAX912ESE?

In the MAX912ESE, LEA controls Comparator A and LEB controls Comparator B. When either pin is held high (≥2.0V) or left floating, the corresponding comparator's output is latched and holds its last valid state. When pulled low (≤0.8V), the output becomes transparent and follows the input differential voltage in real time. This enables independent, synchronous sampling of two analog thresholds.

What is the input common-mode voltage range for the MAX912ESE on a single +5V supply?

On a single +5V supply (V− = GND), the MAX912ESE supports an input common-mode voltage range of –0.2V to +3.5V. This extends 200mV below ground, allowing direct interface with bipolar sensors or DACs whose outputs swing slightly negative-without requiring level-shifting circuitry.

Can the MAX912ESE replace the MAX913 in a design?

The MAX912ESE cannot directly replace the MAX913 because it is a dual comparator (two independent channels) versus the MAX913's single-channel configuration. While both share identical electrical specs per channel-including 10ns propagation delay and latch functionality-the MAX912ESE requires different PCB layout (16-pin narrow SO vs. 8-pin SO) and has distinct pin assignments. Use MAX912ESE only when dual-channel capability is needed.