Analog Devices Inc./Maxim Integrated MAX333ACWP+

Overview

The MAX333ACWP+ from Maxim Integrated is a precision quad SPDT CMOS analog switch designed for high-fidelity signal routing in test equipment and portable instrumentation. It operates with bipolar supplies (±4.5V to ±20V) or single-ended supplies (+10V to +30V), delivers <35Ω on-resistance, guarantees ≤2Ω channel-to-channel match, and supports rail-to-rail analog signal handling up to ±15.5V. Its 10ns typical break-before-make time and <10pC charge injection enable low-distortion switching in precision measurement paths.

For engineers reviewing the MAX333ACWP+ datasheet, MAX333ACWP+ pinout, MAX333ACWP+ application, or MAX333ACWP+ equivalent, key selection criteria include guaranteed on-resistance flatness (∆3Ω max), TTL/CMOS-compatible logic inputs independent of supply voltage, ESD tolerance >2000V, and verified performance across industrial temperature range (0°C to +70°C) in wide SO-20 package.

Technical Context

The MAX333ACWP+ integrates four independent SPDT switches using Maxim's silicon-gate CMOS process, enabling simultaneous control of multiple analog signal paths without crosstalk degradation. Its internal level translator allows logic inputs to operate over +0.8V to +2.4V regardless of supply configuration, while rail-to-rail analog capability ensures full dynamic range utilization across V− to V+.

Break-before-make switching prevents momentary shorting during state transitions, critical for protecting downstream circuitry in multiplexed data acquisition systems. Charge injection (<10pC) and off-isolation (72dB) are tightly specified and production-tested, supporting sub-12-bit accuracy in precision ADC front-ends and automated test equipment signal matrices.

Key Specifications

Pinout & Package

The MAX333ACWP+ is housed in a 20-pin wide SOIC (SO-20W) package with standard 0.300" body width and 0.050" lead pitch, optimized for automated assembly and thermal performance in space-constrained portable designs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADG408BRZ and TS5A3157DCKR, the MAX333ACWP+ uniquely combines quad SPDT topology, bipolar/single-supply flexibility, guaranteed channel matching, and break-before-make timing-making it irreplaceable in precision test and industrial signal routing where signal integrity and topology fidelity are non-negotiable.

Availability

The MAX333ACWP+ is available at Aetrix Electronics and suitable for test equipment, communications infrastructure, heads-up displays, and portable instruments requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for MAX333ACWP+ 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 MAX333A product line was engineered specifically for precision analog signal routing in environments demanding low distortion, high channel consistency, and robust operation across wide supply and temperature ranges.

FAQ

What supply configurations does the MAX333ACWP+ support?

The MAX333ACWP+ supports dual-supply operation from ±4.5V to ±20V and single-supply operation from +10V to +30V. In single-supply mode, V− must be tied to ground. The device maintains rail-to-rail analog signal handling (V− to V+) and TTL/CMOS logic compatibility across all supported supply ranges. This flexibility allows direct integration into both legacy bipolar systems and modern single-rail industrial controllers without external level-shifting circuitry.

Does the MAX333ACWP+ require external decoupling capacitors?

Yes, the MAX333ACWP+ requires local ceramic decoupling capacitors (typically 0.1µF) placed as close as possible to both V+ and V− pins relative to GND. This minimizes supply noise coupling into analog paths and ensures stable switching behavior, especially during fast transitions. Failure to decouple may increase charge injection effects and degrade off-isolation performance below the guaranteed 72dB minimum.

Can the MAX333ACWP+ be used in a +5V-only system?

No, the MAX333ACWP+ is not rated for +5V-only operation. Its absolute minimum single-supply voltage is +10V, and its bipolar minimum is ±4.5V. Attempting to operate below these thresholds results in undefined on-resistance, increased leakage, and potential failure to meet break-before-make timing. For +5V systems, consider alternatives such as the TS5A3157 or ADG1419-but note these lack the MAX333ACWP+'s channel matching and bipolar capability.

What is the significance of the "C" grade in MAX333ACWP+?

The "C" in MAX333ACWP+ denotes the commercial temperature grade (0°C to +70°C), distinguishing it from the extended-grade "E" (−40°C to +85°C) and military-grade "M" variants. All electrical specifications-including on-resistance, leakage, and switching times-are guaranteed over this 0°C to +70°C range. The "WP" suffix confirms the wide SOIC-20 package, and the "+" indicates tape-and-reel packaging with full Maxim quality assurance and traceability.

How does the MAX333ACWP+ handle overvoltage conditions on analog inputs?

The MAX333ACWP+ tolerates analog input voltages from V− to V+ on all COM, NO, and NC terminals-no clamping diodes are needed. However, absolute maximum ratings prohibit exceeding V+ − V− > 44V or any terminal voltage beyond V− to V+. If overvoltage risk exists (e.g., hot-plug scenarios), external series diodes can be added per Figure 1 in the datasheet, though this reduces usable analog range by ~1V. The device's >2000V ESD rating applies only to human-body-model stress-not sustained overvoltage.