Analog Devices Inc./Maxim Integrated MAX4507EAP

Overview

MAX4507EAP from Maxim Integrated is an 8-channel fault-protected analog signal-line protector with rail-to-rail signal handling, ±36V overvoltage protection with power on, 100Ω max on-resistance, and 10ns overvoltage turn-on delay-designed for safeguarding data-acquisition front-ends in industrial process-control systems.

For engineers reviewing the MAX4507EAP datasheet, MAX4507EAP pinout, MAX4507EAP application, or MAX4507EAP equivalent, key selection criteria include fault voltage thresholds (±40V power-off / ±36V power-on), output clamp current (19mA typ), matched on-resistance (≤7Ω), supply range compatibility (±8V to ±18V dual or +9V to +36V single), and SSOP-20 package thermal performance.

Technical Context

The MAX4507EAP integrates eight independent, always-on analog protectors-each featuring internal comparators, sensing circuitry, and dual-clamp structures that force OUT_ to V+ or V− during input overvoltage, while maintaining open-circuit isolation at IN_ under fault. No logic control inputs are required; operation is supply-gated only.

During normal operation, each channel behaves as a low-leakage (<0.5nA), low-on-resistance (65Ω typ) series switch; during fault, it disables the input path and delivers clamped output current (19mA typ) through 500Ω internal clamp resistance-ensuring unambiguous rail termination without latchup across power sequencing events.

Key Specifications

Pinout & Package

MAX4507EAP is housed in a 20-pin shrink small-outline package (SSOP) with 0.65mm lead pitch, 7.65mm × 5.38mm body, and exposed pad-compatible footprint for enhanced thermal dissipation in high-density industrial PCBs.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar fault-protected analog switch applications.

Compared with MAX4507CAP and MAX4507EWN, the MAX4507EAP offers superior thermal performance in space-constrained designs due to its 20-pin SSOP's lower junction-to-ambient resistance (11.11mW/°C derating), tighter RON matching stability over -40°C to +85°C, and compatibility with fine-pitch automated assembly.

Availability

MAX4507EAP is available at Aetrix Electronics and suitable for process-control systems, hot-insertion I/O modules, and data-acquisition front-ends requiring stable component supply with guaranteed long-term industrial temperature grade (-40°C to +85°C) and SSOP-20 packaging.

Supply support for MAX4507EAP 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 fabless semiconductor company specializing in high-performance analog, mixed-signal, and power-management ICs for industrial, automotive, and communications markets.

The MAX4506/MAX4507 product line was engineered specifically for robust analog signal-path protection in harsh environments-addressing failure modes like hot-swap transients, wiring faults, and power-sequencing-induced latchup in modular control systems.

FAQ

What is the maximum continuous overvoltage the MAX4507EAP can withstand with power applied?

The MAX4507EAP guarantees ±36V continuous overvoltage protection on any IN_ pin when power is applied (V+ and V− within operating range). This rating applies across the full -40°C to +85°C temperature range and is validated per Absolute Maximum Ratings table. Exceeding ±36V with supplies active risks permanent damage to the internal protection circuitry. The MAX4507EAP must never be subjected to differential voltages exceeding 40V between IN_ and OUT_.

Does the MAX4507EAP require external control signals to operate?

No, the MAX4507EAP operates as an always-on protector-no logic inputs, enable pins, or clock signals are needed. Its eight channels conduct continuously when V+ and V− are powered within specification. The device relies solely on internal comparators and clamp circuitry to detect and respond to overvoltage events autonomously. This simplifies system design by eliminating timing-critical enable sequencing and reducing firmware dependencies for the MAX4507EAP.

Can the MAX4507EAP be used with single-supply operation?

Yes, the MAX4507EAP supports single-supply operation from +9V to +36V (V− tied to GND). In this configuration, the output clamps to GND or V+ during overvoltage, and fault-free signal range extends from 0V to V+. Electrical characteristics-including 100Ω max RON, 10ns turn-on delay, and ±40V power-off protection-remain valid per the Single-Supply Electrical Characteristics table. The MAX4507EAP maintains full functionality without modification when operated in single-supply mode.

How does the MAX4507EAP prevent latchup during power-up?

The MAX4507EAP incorporates dedicated sensing circuitry and comparator-controlled gate drivers that suppress parasitic SCR activation during asynchronous power sequencing. Unlike standard analog switches, it avoids latchup even when IN_ voltage is applied before V+ or V−, or when supply rails ramp at different rates. This behavior is verified across temperature and documented in the Detailed Description section-ensuring reliable startup in modular systems where the MAX4507EAP guards critical signal paths.

What is the output clamp resistance of the MAX4507EAP during overvoltage?

During overvoltage, the MAX4507EAP limits output current via an internal 500Ω clamp resistance (typical), delivering up to 19mA into the appropriate supply rail. This value is measured under specified conditions (VIN_ = ±25V, V+ = +15V, V− = −15V) and ensures predictable clamping behavior without excessive power dissipation. The MAX4507EAP's 500Ω clamp resistance enables precise current limiting while maintaining rail-defined output states-critical for protecting downstream op-amps or ADC inputs.