Analog Devices Inc./Maxim Integrated MAX9203ESA+

Overview

The MAX9203ESA+ from Maxim Integrated is a single high-speed voltage comparator with TTL-compatible output and latch input, designed for precision signal discrimination in timing-critical circuits. It delivers 7ns typical propagation delay at 5mV overdrive, consumes only 9mW at +5V supply, supports analog supplies from +5V to +10V (VEE grounded), and operates across –40°C to +85°C - ideal for high-speed A/D converter front-ends and line receiver applications.

For engineers reviewing the MAX9203ESA+ datasheet, MAX9203ESA+ pinout, MAX9203ESA+ application, or MAX9203ESA+ equivalent, key selection considerations include its single-channel latch-enabled architecture, SOT23-8-compatible narrow SO package, ±5V or single +5V analog supply flexibility, and guaranteed 12ns max propagation delay over temperature.

Technical Context

The MAX9203ESA+ implements a bipolar comparator core with active internal pullup on its TTL output stage and a dedicated TTL-compatible latch input that freezes output state when driven low. Its analog input common-mode range extends to the negative rail (VEE), enabling ground-sensing operation under single-supply conditions (+5V VCC, VEE = GND).

It supports three power configurations: separate analog (VCC/VEE) and digital (VDD) rails, single +5V analog supply (VCC = +5V, VEE = GND), or split ±5V analog supply (VCC = +5V, VEE = –5V), with VDD strictly requiring +4.75V to +5.25V. Latch timing parameters include 10ns disable-to-output delay, 2ns minimum setup time, and 1ns hold time.

Key Specifications

Pinout & Package

MAX9203ESA+ is housed in an 8-pin narrow SO (Small Outline) package, pin-compatible with industry-standard SOIC-8 footprints but with reduced width (3.9mm body). This package supports automated assembly and provides thermal performance suitable for industrial ambient conditions.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar voltage comparator applications.

Compared with LM311DR and TLV3501CDR, the MAX9203ESA+ uniquely combines TTL-compatible latching, 7ns speed, and flexible analog supply options - making it the only choice among the three for synchronized, high-speed, single-supply comparator applications requiring deterministic output hold behavior.

Availability

MAX9203ESA+ is available at Aetrix Electronics and suitable for high-speed A/D converters, line receivers, and PWM circuits requiring stable component supply, long-term industrial lifecycle support, and consistent parametric performance across temperature.

Supply support for MAX9203ESA+ 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 MAX9203ESA+ belongs to Maxim's low-power, high-speed comparator product line, engineered specifically for applications demanding precise timing, latch synchronization, and robust operation in mixed-signal environments.

FAQ

What is the maximum operating temperature range for the MAX9203ESA+?

The MAX9203ESA+ is rated for continuous operation from –40°C to +85°C. This industrial-grade temperature range is fully specified in the datasheet's Absolute Maximum Ratings and Electrical Characteristics tables, with all key parameters (e.g., propagation delay, offset voltage, supply current) guaranteed across this span. The MAX9203ESA+ die and packaging are qualified to meet these limits without derating.

Does the MAX9203ESA+ require separate analog and digital ground planes?

The MAX9203ESA+ does not mandate separate ground planes, but its pinout and internal architecture support them: VEE serves as analog substrate/reference, GND as digital ground, and VDD/VCC as isolated supply domains. When noise isolation is critical - such as in high-resolution ADC systems - separating analog and digital grounds with a single-point connection improves PSRR and reduces coupling-induced jitter in the MAX9203ESA+ output.

Can the MAX9203ESA+ operate from a single +3.3V supply?

No. The MAX9203ESA+ requires VDD = +4.75V to +5.25V and analog supplies of at least +4.75V (VCC–VEE). Its TTL output stage and internal latch circuitry are designed for 5V logic compatibility and cannot reliably operate at 3.3V. Using +3.3V on VDD or VCC will result in undefined output states, latch failure, or permanent damage per Absolute Maximum Ratings.

What is the purpose of the VEE pin on the MAX9203ESA+?

The VEE pin on the MAX9203ESA+ serves as the negative analog supply and substrate connection. In single-supply mode, it is tied to GND to enable ground-referenced input sensing. In split-supply mode, it connects to –5V to extend the input common-mode range downward. Unlike a typical ground pin, VEE directly sets the lower bound of the analog input voltage range and must be decoupled independently for optimal noise rejection.

How does the latch function behave during power-up of the MAX9203ESA+?

At power-up, the MAX9203ESA+ latch input is undefined until VDD and VCC stabilize. The datasheet specifies no power-on reset or default latch state; therefore, the output remains in a high-impedance or metastable condition until the LATCH pin is actively driven high (enabling transparent mode) or low (latching last valid state). System design must ensure controlled LATCH pin sequencing - typically held low until supplies settle - to avoid spurious output transitions during MAX9203ESA+ startup.