Analog Devices Inc./Maxim Integrated MAX9203ESA+T

Overview

MAX9203ESA+T 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 ±5V or +5V-to-+10V analog supplies with rail-to-rail common-mode input range, and operates across –40°C to +85°C - ideal for high-speed A/D converter front-ends and line receivers.

For engineers reviewing the MAX9203ESA+T datasheet, MAX9203ESA+T pinout, MAX9203ESA+T application, or MAX9203ESA+T equivalent, this page provides verified electrical parameters, latch timing constraints (t_S = 2ns, t_N = 1ns), SO-8 package mechanical data, real-world comparator use cases, and two validated alternative parts with documented functional and interface differences.

Technical Context

The MAX9203ESA+T implements a bipolar comparator core with active internal TTL pullups and a dedicated latch input that freezes output state on logic-low assertion. Its analog inputs accept common-mode voltages down to VEE (including ground when VEE = GND), enabling single-supply operation with input sensing referenced to system ground.

It requires separate VCC (analog positive), VEE (analog negative/substrate), VDD (digital +5V), and GND connections. The latch function is synchronous and edge-triggered, with defined setup (2ns), hold (1ns), and disable pulse width (8ns) requirements - not present in the latch-free MAX9201 variant.

Key Specifications

Pinout & Package

MAX9203ESA+T is housed in an 8-pin narrow SO (Small Outline) package, 3.9mm × 4.9mm body, 1.27mm pitch, with gull-wing leads. Pin 1 marked by beveled corner.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LM311DR and MAX903ESA+, the MAX9203ESA+T uniquely combines sub-10ns speed, integrated latch control, and TTL output drive in an SO-8 package - making it the only option for synchronously sampled, low-latency comparator applications without external logic or layout changes.

Availability

MAX9203ESA+T is available at Aetrix Electronics and suitable for high-speed A/D converters, line receivers, and PWM timing circuits requiring stable component supply, consistent parametric performance, and long-term industrial temperature support (–40°C to +85°C).

Supply support for MAX9203ESA+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, mixed-signal, and power management ICs for industrial, communications, and computing applications.

The MAX920x family was developed specifically for high-speed, low-power voltage comparison in data acquisition and signal conditioning systems - emphasizing speed, latch synchronization, and supply flexibility over general-purpose comparators.

FAQ

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

The MAX9203ESA+T is rated for continuous operation from –40°C to +85°C. This industrial temperature range is guaranteed by design and confirmed in the Absolute Maximum Ratings table. All electrical specifications, including propagation delay and input offset voltage, are specified across this full range. The device's junction temperature must not exceed +150°C under any operating condition.

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

Yes - the MAX9203ESA+T uses distinct VEE (analog negative/substrate) and GND (digital ground) pins, and optimal performance requires physically separated analog and digital ground regions on the PCB. This separation prevents digital switching noise from modulating the analog input stage. The datasheet explicitly recommends separate decoupling for VCC and VDD, and layout guidance mandates low-inductance ground planes with short lead lengths.

Can the MAX9203ESA+T operate from a single +5V supply?

Yes - the MAX9203ESA+T supports single-supply operation by tying VEE to GND and applying +5V to both VCC and VDD. In this configuration, the input common-mode range extends from GND to VCC – 2.25V (i.e., 0V to +2.75V), enabling ground-referenced signal detection. The latch input remains fully functional, and all timing specifications apply under this condition.

What is the purpose of the LATCH pin on the MAX9203ESA+T?

The LATCH pin on the MAX9203ESA+T controls synchronous output capture: when driven high, the comparator operates transparently; when driven low, the current output state is held regardless of subsequent input changes. This function enables precise timing alignment in sampling systems. Critical timing parameters include 2ns minimum setup time (t_S) and 1ns minimum hold time (t_N), ensuring reliable edge-triggered latching.

How does the MAX9203ESA+T differ from the MAX9201 and MAX9202 in terms of channel count and latch capability?

The MAX9203ESA+T is a single-channel comparator with one LATCH input and one OUT pin. In contrast, the MAX9201 is quad-channel (four comparators, no latch), and the MAX9202 is dual-channel (two comparators, each with dedicated LATCH and OUT pins). All three share identical electrical specs per channel (7ns delay, 9mW, TTL output), but pin count, channel density, and latch allocation differ - making MAX9203ESA+T optimal for space-constrained single-comparator designs requiring latching.