Analog Devices Inc./Maxim Integrated MAX4533CWP+T

Overview

MAX4533CWP+T from Maxim Integrated is a quad SPDT analog switch with rail-to-rail signal handling, ±25V fault protection (power on) and ±40V fault protection (power off), 175Ω max on-resistance at ±15V supplies, and TTL/CMOS-compatible logic inputs - designed for high-reliability signal routing in test equipment and industrial data-acquisition systems.

For engineers reviewing the MAX4533CWP+T datasheet, MAX4533CWP+T pinout, MAX4533CWP+T application, or MAX4533CWP+T equivalent, this page delivers verified specifications, validated pin functions, confirmed fault-protection behavior under dual/supply conditions, and real-world alternative part comparisons for robust system design.

Technical Context

The MAX4533CWP+T implements a parallel N-channel/P-channel MOSFET architecture per channel, enabling rail-to-rail conduction and fast fault response (20ns typical). Its internal voltage-sensing comparators monitor NO_/NC_ terminals against V+ and V− rails to trigger clamping and isolation during overvoltage events.

Each of the four independent SPDT switches features bidirectional analog paths, break-before-make timing (≤20ns), and output clamping to appropriate supply rails during faults - delivering unambiguous rail-to-rail outputs without transition glitches, even under ±25V transient overvoltage with ±15V supplies.

Key Specifications

Pinout & Package

MAX4533CWP+T is housed in a 20-pin Wide SO (SOIC-W) package with 0.3" body width and standard gull-wing leads. Pin 15 is NC (not internally connected); all other pins are electrically active as defined below.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX4533CAP+T, the MAX4533CWP+T offers identical functionality in a wider SO package for easier hand-soldering and thermal relief; compared with ADG1434BRUZ, it trades higher on-resistance for comprehensive fault protection essential in industrial and test environments.

Availability

MAX4533CWP+T is available at Aetrix Electronics and suitable for redundant/backup systems, test equipment, and industrial data-acquisition requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.

Supply support for MAX4533CWP+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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power-management ICs for industrial, communications, and computing applications.

The MAX4533 product line delivers fault-protected analog switching for mission-critical signal routing where reliability under overvoltage stress is non-negotiable - targeting test instrumentation, avionics, and process control systems.

FAQ

What is the maximum fault voltage the MAX4533CWP+T can withstand with power applied?

The MAX4533CWP+T withstands ±25V on NO_ or NC_ terminals with power applied (e.g., ±15V supplies), as specified in Absolute Maximum Ratings and Electrical Characteristics tables. Exceeding this limit risks permanent damage. The device also supports ±40V fault protection when V+ and V− are at 0V - making it suitable for hot-swap and maintenance scenarios where power may be removed but signals remain present.

Does the MAX4533CWP+T require power-supply sequencing during startup or shutdown?

No, the MAX4533CWP+T does not require power-supply sequencing. Its internal architecture ensures reliable operation regardless of the ramp order of V+, V−, or GND. This eliminates the need for external sequencing circuits in multi-rail systems and simplifies power-up/down procedures in industrial controllers and portable instruments where supply timing cannot be tightly controlled.

How does the MAX4533CWP+T handle overvoltage faults on its NO_ or NC_ pins?

During an overvoltage fault, the MAX4533CWP+T isolates the affected NO_ or NC_ terminal by turning off the internal N/P FET pair and clamping the COM_ output to the appropriate supply rail (V+ for positive faults, V− for negative faults). This occurs within 20ns and limits output voltage to safe levels, protecting downstream circuitry without requiring external diodes or TVS devices.

Can the MAX4533CWP+T operate from a single supply, and what is the valid range?

Yes, the MAX4533CWP+T operates from a single supply between +9V and +36V, with V− tied to GND. In this configuration, it maintains rail-to-rail signal handling (0V to V+), fault protection up to ±25V relative to GND, and TTL/CMOS-compatible logic thresholds. Performance metrics such as on-resistance (390Ω max at +12V) and leakage current are characterized and guaranteed across this range.

Is the MAX4533CWP+T pin-compatible with the MAX333A, and what benefits does it offer over that part?

Yes, the MAX4533CWP+T is pin-compatible with the MAX333 and MAX333A. It improves upon them with enhanced fault protection (±25V/±40V vs. ±15V), lower on-resistance (175Ω max vs. ~220Ω), rail-to-rail signal handling, and improved leakage (0.5nA vs. ~1nA at +25°C). These upgrades enable more robust, accurate, and compact designs without layout changes.