Analog Devices Inc./Maxim Integrated MAX4533EPP+

Overview

MAX4533EPP+ from Maxim Integrated is a quad, single-pole/double-throw (SPDT), fault-protected analog switch with rail-to-rail signal handling, ±25V fault protection with power on, and ±40V fault protection with power off. It features 175Ω max on-resistance, 0.5nA max off-leakage at +25°C, and operates from dual ±4.5V to ±18V or single +9V to +36V supplies. It is used in industrial data-acquisition systems requiring robust overvoltage resilience.

For engineers reviewing the MAX4533EPP+ datasheet, MAX4533EPP+ pinout, MAX4533EPP+ application, or MAX4533EPP+ equivalent, key selection criteria include fault-protection voltage limits, rail-to-rail analog range, on-resistance matching across channels, and TTL/CMOS-compatible logic thresholds under ±15V or +12V supply conditions.

Technical Context

The MAX4533EPP+ uses parallel N-channel and P-channel MOSFETs per SPDT channel, enabling low on-resistance and true rail-to-rail conduction. Internal voltage sensors monitor NO_/NC_ inputs against V+ and V− rails; when overvoltage exceeds ~150mV, the switch disconnects and clamps COM_ to the appropriate supply rail via dedicated clamp transistors (N2/P2).

Fault response time is 20ns typical, with ±10mA clamp output current capability during faults. Break-before-make timing is 2.5µs for positive faults and 1.3µs for negative faults, and no power-supply sequencing is required during power-up or power-down.

Key Specifications

Pinout & Package

MAX4533EPP+ is packaged in a 20-pin plastic DIP (dual in-line package) with 0.3-inch body width and standard through-hole mounting. Pin spacing is 0.1 inch, compatible with industry-standard PCB footprints and socketing.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX4533EWP+ and ADG467BRZ, the MAX4533EPP+ uniquely combines through-hole manufacturability, ±40V power-off fault resilience, and rail-to-rail clamping-making it optimal for industrial field I/O modules where serviceability and unpowered safety are mandatory.

Availability

MAX4533EPP+ is available at Aetrix Electronics and suitable for industrial process control, avionics signal routing, and portable test equipment requiring stable component supply across extended temperature ranges (–40°C to +85°C).

Supply support for MAX4533EPP+ 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 high-performance analog and mixed-signal ICs for industrial, automotive, and communications markets, with emphasis on reliability and integration.

The MAX4533EPP+ belongs to Maxim's fault-protected analog switch product line, engineered specifically for harsh environments where overvoltage resilience, rail-to-rail signal fidelity, and fail-safe behavior are non-negotiable design requirements.

FAQ

What is the operating temperature range for the MAX4533EPP+?

The MAX4533EPP+ is rated for –40°C to +85°C ambient operation, making it suitable for industrial and avionics applications exposed to wide thermal swings. This extended temperature grade is confirmed in the Ordering Information table and Absolute Maximum Ratings section of the official datasheet. The MAX4533EPP+ maintains specified on-resistance, leakage, and fault-response performance across this full range.

Does the MAX4533EPP+ require power-supply sequencing during startup?

No, the MAX4533EPP+ does not require power-supply sequencing during power-up or power-down. Its internal architecture ensures safe operation regardless of V+ and V− ramp order. This eliminates the need for external sequencing circuitry in systems using asymmetric or independently controlled supplies-a key advantage over legacy fault-protected switches like the MAX333A.

Can the MAX4533EPP+ be used with a single +24V supply?

Yes, the MAX4533EPP+ supports single-supply operation from +9V to +36V, including +24V. When V− is tied to GND, the device delivers rail-to-rail analog performance from 0V to +24V, with on-resistance increasing slightly versus ±15V dual-supply operation. Logic inputs remain compatible with +24V-tolerant controllers due to internal level translation.

How does fault protection work on the NO_ and NC_ pins of the MAX4533EPP+?

During a fault, when NO_ or NC_ exceeds V+ or V− by ~150mV, internal sense circuitry disables the main switch FETs (N1/P1) and activates clamp transistors (N2/P2) to limit COM_ to the nearest supply rail. With power on, protection extends to ±25V; with V+ = V− = 0, it withstands ±40V. Leakage remains below 10nA at +85°C, ensuring downstream isolation.

Is the MAX4533EPP+ pin-compatible with the MAX333A?

Yes, the MAX4533EPP+ is explicitly designed as a pin-compatible upgrade to the industry-standard MAX333 and MAX333A. All 20 pins-including IN_, NO_, NC_, COM_, V+, V−, GND, and N.C.-map identically. Engineers can replace MAX333A with MAX4533EPP+ to gain improved fault protection, lower on-resistance, and rail-to-rail operation without layout or firmware changes.