Analog Devices Inc./Maxim Integrated MAX913ESA+

Overview

The MAX913ESA+ from Maxim Integrated is a single, ultra-fast, low-power precision TTL comparator with differential inputs and complementary TTL outputs. It delivers 10ns typical propagation delay, ±5V or +5V single-supply operation, input voltage range extending below the negative rail (–0.2V to +3.5V on +5V supply), and stable linear-region operation-enabling high-resolution zero-crossing detection in switching regulator feedback loops.

For engineers reviewing the MAX913ESA+ datasheet, MAX913ESA+ pinout, MAX913ESA+ application, or MAX913ESA+ equivalent, this device is selected for high-speed sampling circuits, V/F converters requiring sub-millivolt offset stability, and Ethernet line receivers where latch-enabled output hold and no minimum slew-rate requirement are critical design factors.

Technical Context

The MAX913ESA+ uses a fully differential bipolar input amplifier with laser-trimmed offset (0.8mV typ), enabling stable operation across its full common-mode range (–5.2V to +3.5V on ±5V supplies). Its latch-enable architecture allows transparent or latched output behavior controlled by the LE pin, with guaranteed setup (2ns) and hold (5ns) timing.

No internal hysteresis is implemented-preserving resolution down to the input offset limit-and the comparator remains stable even with slow-moving or near-zero-differential inputs, eliminating oscillation in the linear region without external compensation.

Key Specifications

Pinout & Package

MAX913ESA+ is housed in an 8-pin SO (Small Outline) package, 150-mil width, with gull-wing leads and RoHS-compliant matte tin plating. Pin 1 is marked with a beveled corner or dot; thermal pad is not present.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LT1016CS8#PBF and ADCMP572BCPZ-R2, the MAX913ESA+ uniquely balances TTL compatibility, integrated latch control, sub-10ns delay, and single/dual supply flexibility-making it optimal for industrial power control and mixed-signal sampling where timing determinism and board-level integration matter.

Availability

MAX913ESA+ is available at Aetrix Electronics and suitable for switching regulators, Ethernet line receivers, zero-crossing detectors, and high-speed sampling circuits requiring stable component supply across industrial temperature ranges and long production lifecycles.

Supply support for MAX913ESA+ 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 semiconductor company specializing in high-performance analog, mixed-signal, and power-management ICs for industrial, communications, and computing applications.

The MAX912/MAX913 family was designed specifically for high-speed, low-power comparator applications demanding stable linear-region behavior, latch control, and TTL compatibility-targeting power conversion, data acquisition, and communication receiver subsystems.

FAQ

What is the maximum operating frequency supported by the MAX913ESA+?

The MAX913ESA+ supports input signal rates up to 85MHz under 20mV overdrive conditions at +25°C, based on its 12ns maximum propagation delay. Its latch-enable timing (tSU = 2ns, tH = 5ns) ensures reliable sampling at these rates. For sustained operation across –40°C to +85°C, derate to ≤70MHz with appropriate layout and bypassing. The MAX913ESA+ does not specify a clock frequency but relies on signal overdrive and clean power delivery to achieve rated performance.

Does the MAX913ESA+ require external hysteresis for stable operation?

No, the MAX913ESA+ does not require external hysteresis. Its internal architecture ensures stable output behavior-even with slow-moving or near-zero-differential inputs-by eliminating oscillation in the linear region. Adding hysteresis degrades resolution and contradicts the design intent. The MAX913ESA+ achieves this via a fully differential bipolar input stage with trimmed offset and no built-in hysteresis, as confirmed in the Detailed Description section of the datasheet.

Can the MAX913ESA+ operate from a single +3.3V supply?

No, the MAX913ESA+ is not specified for +3.3V operation. Its absolute maximum positive supply is +7V, but functional operation requires V+ ≥ +4.5V per the Electrical Characteristics table. At +3.3V, output drive strength, propagation delay, and input common-mode range degrade outside guaranteed limits. The MAX913ESA+ is characterized for +5V single supply or ±5V dual supply only; for 3.3V systems, consider the MAX9021 or similar 3.3V-optimized comparators.

What is the purpose of the LE (latch enable) pin on the MAX913ESA+?

The LE pin on the MAX913ESA+ controls whether the comparator output is transparent or latched. When LE is low, Q and Q̄ follow the differential input in real time; when LE is high or floating, the last valid output state is held indefinitely. This eliminates the need for external latches in sampled-data systems and simplifies timing-critical interfaces to microcontrollers or FPGAs. The MAX913ESA+ guarantees 2ns setup and 5ns hold times relative to LE assertion.

How does the input common-mode range of the MAX913ESA+ compare between single and dual supply configurations?

On a single +5V supply (V− = GND), the MAX913ESA+ input common-mode range is –0.2V to +3.5V. On dual ±5V supplies (V− = –5V), it extends to –5.2V to +3.5V-providing an 8.7V total range. This rail-to-rail capability below the negative supply enables direct interfacing with AC-coupled or bipolar sensor signals without level-shifting circuitry. The MAX913ESA+ maintains full performance across both configurations without reconfiguration.