Analog Devices Inc./Maxim Integrated MAX912CSE+T

Overview

The MAX912CSE+T from Maxim Integrated is a dual, ultra-fast, low-power precision TTL comparator with differential inputs and complementary TTL outputs. It delivers 10ns typical propagation delay, ±5V or single +5V operation, and stable linear-region behavior-enabling high-resolution zero-crossing detection and V/F conversion in power-constrained industrial timing systems.

For engineers reviewing the MAX912CSE+T datasheet, MAX912CSE+T pinout, MAX912CSE+T application, or MAX912CSE+T equivalent, this device is selected for high-speed sampling circuits, switching regulator feedback paths, and applications requiring latch-controlled output retention without hysteresis-induced resolution loss.

Technical Context

The MAX912CSE+T implements a fully differential bipolar input stage with trimmed offset voltage (0.8mV typ) and wide common-mode range (–0.2V to +3.5V on single +5V supply). Its latch-enable architecture supports independent control of each comparator's output state, eliminating need for external latching logic.

Unlike conventional high-speed comparators, it remains stable through the linear region-no minimum input slew rate required-and avoids oscillation even with slow-moving signals. This enables accurate discrimination of low-frequency analog transitions without hysteresis degradation.

Key Specifications

Pinout & Package

MAX912CSE+T is housed in a 16-pin narrow SO (SOIC-N) package, 3.9mm × 9.9mm body, 1.27mm pitch, RoHS-compliant, with exposed pad not present.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LM393DR and TLV3502IDR, the MAX912CSE+T uniquely combines 10ns speed, dual independent latches, stable linear-region operation, and –0.2V input capability-making it irreplaceable in precision zero-crossing, synchronized sampling, and switching regulator fault detection where timing integrity and input range are non-negotiable.

Availability

MAX912CSE+T is available at Aetrix Electronics and suitable for switching regulators, high-speed sampling circuits, and zero-crossing detectors requiring stable component supply across industrial temperature ranges (0°C to +70°C).

Supply support for MAX912CSE+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 industrial, communications, and computing applications, with emphasis on performance, integration, and reliability.

The MAX912CSE+T belongs to Maxim's high-speed comparator product line, engineered specifically for applications demanding nanosecond timing accuracy, latch-controlled output retention, and stable operation without hysteresis-targeting power management, test equipment, and real-time signal conditioning.

FAQ

What is the operating temperature range for the MAX912CSE+T?

The MAX912CSE+T is rated for 0°C to +70°C ambient operation, as indicated by the 'C' suffix in its part number. This commercial-grade temperature range suits indoor industrial controls, test instrumentation, and embedded systems not exposed to extreme thermal environments. The device maintains specified propagation delay, offset voltage, and latch timing across this full range, with derating applied only for continuous power dissipation above +70°C.

Does the MAX912CSE+T require external hysteresis for stable operation?

No, the MAX912CSE+T does not require external hysteresis. Its internal architecture ensures stable output behavior even when inputs reside in the linear region-unlike many high-speed comparators that oscillate under slow-moving or low-overdrive conditions. Adding hysteresis would degrade resolution without benefit; the MAX912CSE+T achieves full DC-coupled accuracy while maintaining 10ns propagation delay.

Can the MAX912CSE+T operate from a single +5V supply?

Yes, the MAX912CSE+T supports single +5V operation: connect V− to GND, apply +5V to V+, and use GND as logic reference. In this configuration, its common-mode input range extends from –0.2V to +3.5V, allowing inputs slightly below ground-ideal for transformer-coupled or AC-coupled zero-crossing detection. Supply current remains 6mA per comparator, and TTL outputs meet standard VOH/VOL specs.

What is the function of the N.C. pins (pins 5 and 12) on the MAX912CSE+T?

Pins 5 and 12 on the MAX912CSE+T are No Connection (N.C.) terminals-physically present but not bonded to any internal circuitry. They must remain unconnected on the PCB; no routing, termination, or grounding is permitted. These pins exist solely for mechanical symmetry and package compatibility with other variants in the MAX912 family; violating this rule risks parasitic coupling or assembly defects.

How does the latch enable (LEA/LEB) functionality work on the MAX912CSE+T?

Each comparator in the MAX912CSE+T has its own latch enable: LEA controls Comparator A, LEB controls Comparator B. When LEA or LEB is driven high (≥2.0V) or left floating, the corresponding QA/QA or QB/QB outputs hold their last valid state. When pulled low (≤0.8V), the comparator enters transparent mode-the outputs respond immediately to input differential voltage. This enables precise, asynchronous capture of analog thresholds without external flip-flops.