Analog Devices Inc./Maxim Integrated MAX333ACWP

Overview

MAX333ACWP from Maxim Integrated is a precision quad SPDT CMOS analog switch designed for high-fidelity signal routing in test equipment and communications systems. 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 signals up to ±15.5V - enabling accurate switching in portable instrumentation and PBX interfaces.

For engineers reviewing the MAX333ACWP datasheet, MAX333ACWP pinout, MAX333ACWP application, or MAX333ACWP equivalent, key selection criteria include guaranteed on-resistance flatness (∆3Ω max), low charge injection (<10pC), break-before-make timing (10ns typical), and TTL/CMOS-compatible logic inputs independent of supply voltage.

Technical Context

The MAX333ACWP integrates four independent SPDT switches fabricated using Maxim's silicon-gate process, delivering matched analog performance across channels without external trimming. Its internal level translator enables logic compatibility across full supply ranges, while the monolithic architecture ensures consistent charge injection and leakage behavior.

It supports dual-supply operation with true rail-to-rail analog signal handling (VCOM, VNO, VNC = V− to V+), and features break-before-make switching with 145ns max turn-off and 175ns max turn-on times under ±15V conditions - critical for preventing signal shorting in multiplexed measurement paths.

Key Specifications

Pinout & Package

MAX333ACWP is housed in a 20-pin wide SO (Small Outline) package, 7.5mm body width, 1.27mm pitch, RoHS-compliant, with exposed pad option not specified. Pin 6 is GND; Pins 5 and 16 are V− and V+, respectively; Pins 1,10,11,20 are logic inputs (IN1–IN4); Pins 3,8,13,18 are common terminals (COM1–COM4); Pins 4,7,14,17 are normally closed (NC1–NC4); Pins 2,9,12,19 are normally open (NO1–NO4); Pin 15 is not internally connected.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADG408BRUZ and TS5A3157DCUR, the MAX333ACWP uniquely combines quad SPDT topology, bipolar supply support, guaranteed channel matching, and rail-to-rail analog operation - making it irreplaceable in high-accuracy, wide-supply test and telecom signal routing where topology, voltage range, and matching are co-constrained.

Availability

MAX333ACWP is available at Aetrix Electronics and suitable for test equipment multiplexing, communications signal routing, PBX interface design, and portable instrument signal conditioning requiring stable component supply and long-term manufacturability.

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) designs precision analog, mixed-signal, and power management ICs for industrial, communications, and consumer applications - emphasizing performance, integration, and reliability.

The MAX333A product line delivers high-accuracy analog switching solutions targeting applications demanding low distortion, tight parameter matching, and robust operation across wide supply and temperature ranges.

FAQ

What supply configurations does the MAX333ACWP support?

The MAX333ACWP supports bipolar supplies from ±4.5V to ±20V and single-ended supplies from +10V to +30V. When using a single supply, V− must be connected to ground. The device maintains rail-to-rail analog signal handling (VCOM, VNO, VNC = V− to V+) across all supported supply modes, and logic inputs remain compatible with TTL/CMOS levels regardless of supply voltage - a key advantage for mixed-domain systems. This flexibility makes the MAX333ACWP suitable for both legacy ±15V test gear and modern +24V industrial controllers.

Does the MAX333ACWP guarantee on-resistance matching between channels?

Yes, the MAX333ACWP guarantees on-resistance matching of less than 2Ω between any two channels under bipolar-supply operation - a specification explicitly tested and warranted in the datasheet. This matching holds over temperature and signal voltage range, enabling precise differential measurements and ratiometric sensor interfacing without per-channel calibration. The guarantee applies only with bipolar supplies (e.g., ±15V); single-supply operation does not carry this matching assurance, per Note 4 in the Electrical Characteristics table.

What is the maximum analog signal voltage the MAX333ACWP can handle?

The MAX333ACWP supports analog signals from V− to V+ - fully rail-to-rail - with absolute maximum ratings allowing VCOM, VNO, and VNC to swing within the supply rails. For example, with ±15V supplies, analog signals may range from −15.5V to +15.5V. The (VNO − VNC) differential rating is 32V max, and the device tolerates continuous analog voltages up to the supply rails without damage. This capability eliminates external level shifters in high-voltage data acquisition and telecom line interface designs.

How does the MAX333ACWP achieve break-before-make switching?

The MAX333ACWP implements internal timing control that ensures the normally closed (NC) path opens before the normally open (NO) path closes - with a typical break interval of 10ns. This behavior is inherent to its monolithic silicon-gate design and does not require external timing components. Break-before-make prevents momentary shorting between NC and NO terminals during logic transitions, which is essential in applications like ATE multiplexing and telecom loopback testing where signal integrity during reconfiguration is critical. Measured tOFF <145ns and tON <175ns confirm fast, controlled switching under ±15V conditions.

Is the MAX333ACWP pin-compatible with older DG-series analog switches?

The MAX333ACWP is explicitly positioned as an upgraded replacement for a DG211/DG212 pair or two DG403s, but it is not pin-compatible with any single DG-series part. Its 20-pin wide SO footprint differs from the 16-pin packages used by DG211/DG212 (SO-16) and DG403 (SO-16). While functional equivalence exists - including quad SPDT topology, low on-resistance, and TTL compatibility - board-level redesign is required to accommodate the larger package and different pin assignments (e.g., dedicated V+, V−, GND, and N.C. pins). No drop-in replacement is possible without layout modification.