Analog Devices Inc./Maxim Integrated MAX333ACAP

Overview

MAX333ACAP from Maxim Integrated is a precision quad SPDT CMOS analog switch designed for high-fidelity signal routing in test and portable instrumentation. It operates with bipolar supplies (±4.5V to ±20V) or single-ended supplies (+10V to +30V), delivers <35Ω on-resistance with <2Ω channel matching, <10pC charge injection, and rail-to-rail analog signal handling up to ±15.5V. It is used in heads-up displays and PBX systems where low distortion and fast switching (<175ns turn-on) are critical.

For engineers reviewing the MAX333ACAP datasheet, MAX333ACAP pinout, MAX333ACAP application, or MAX333ACAP equivalent, key selection criteria include guaranteed on-resistance flatness (∆3Ω max), break-before-make timing (10ns typical), TTL/CMOS-compatible logic inputs (0.8V–2.4V), and ESD robustness (>2000V).

Technical Context

The MAX333ACAP implements four independent SPDT switches using Maxim's silicon-gate CMOS process, enabling simultaneous control of four analog signal paths with matched conduction characteristics. Its internal level translator supports logic inputs referenced to ground while switching analog signals spanning the full supply rails (V− to V+).

Break-before-make switching prevents momentary shorting during state transitions, and its low 5pF on/off capacitance ensures minimal signal coupling and crosstalk (72dB off-isolation, 78dB crosstalk at 1MHz). Charge injection is tightly controlled (<10pC) to reduce glitch-induced errors in precision sampling circuits.

Key Specifications

Pinout & Package

The MAX333ACAP is housed in a 20-pin plastic DIP package (0°C to +70°C operating range), with through-hole mounting and standard 0.3-inch width. Pin 6 is GND; pins 5 and 16 are V− and V+, respectively; pins 1,10,11,20 are logic inputs (IN1–IN4); pins 2,9,12,19 are normally open terminals (NO1–NO4); pins 3,8,13,18 are common poles (COM1–COM4); pins 4,7,14,17 are normally closed terminals (NC1–NC4); pin 15 is not internally connected.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADG408BRZ and TS5A3157DCKR, the MAX333ACAP uniquely combines quad SPDT topology, bipolar/single-supply versatility, guaranteed break-before-make, and sub-10pC charge injection - making it irreplaceable in precision ±15V test and avionics signal routing where topology and timing integrity are non-negotiable.

Availability

MAX333ACAP is available at Aetrix Electronics and suitable for test equipment, communications infrastructure, heads-up displays, and portable instrumentation requiring stable component supply across extended temperature and voltage ranges.

Supply support for MAX333ACAP 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 U.S.-based semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, communications, and computing applications.

The MAX333A product line was engineered for precision analog signal routing in environments demanding low distortion, high channel matching, and robust supply flexibility - particularly in test and measurement, telecom switching, and ruggedized portable electronics.

FAQ

What supply configurations does the MAX333ACAP support?

The MAX333ACAP supports dual-supply operation from ±4.5V to ±20V and single-supply operation from +10V to +30V. When using a single supply, V− must be connected to ground. The device maintains full rail-to-rail analog signal handling (V− to V+) across all supported supply ranges, and logic inputs remain compatible with TTL/CMOS levels regardless of supply voltage. This flexibility makes the MAX333ACAP suitable for both legacy ±15V test gear and modern +12V portable instruments.

Does the MAX333ACAP provide guaranteed break-before-make switching?

Yes, the MAX333ACAP guarantees break-before-make operation with a typical open interval of 10ns. This is explicitly characterized in the datasheet and ensures no momentary shorting between NO and NC terminals during switching transitions. The feature is critical in applications like multiplexed sensor readouts or video routing, where signal integrity depends on clean channel isolation. Unlike many analog switches that only specify typical B-B-M behavior, the MAX333ACAP provides this timing guarantee across temperature and supply conditions.

What is the maximum analog signal voltage the MAX333ACAP can handle?

The MAX333ACAP supports analog signals ranging from V− to V+ - i.e., rail-to-rail operation. With ±15V supplies, it handles ±15.5V signals; with +12V single supply (V− = GND), it handles 0V to +12V. Absolute maximum ratings allow (VNO − VNC) up to 32V and VCOM up to V− or V+, but sustained operation must stay within the specified supply rails. This capability eliminates external level shifters in ±15V instrumentation and simplifies design in wide-dynamic-range applications.

How does the MAX333ACAP achieve low charge injection?

The MAX333ACAP achieves <10pC guaranteed charge injection through Maxim's optimized silicon-gate CMOS process and balanced transistor layout in each SPDT cell. Internal charge cancellation techniques minimize net charge dumped onto the COM node during switching, which directly reduces voltage glitches in high-impedance sampling circuits like those found in precision data acquisition systems. This specification is tested and guaranteed over temperature and supply voltage, making the MAX333ACAP suitable for use in sample-and-hold amplifiers and switched-capacitor filters where glitch-induced errors must be minimized.

Is the MAX333ACAP pin-compatible with older DG-series analog switches?

The MAX333ACAP is an upgraded functional replacement for two DG403s or a DG211/DG212 pair, but it is not pin-compatible with those devices. Its 20-pin DIP footprint and pin assignments (e.g., dedicated V+, V−, GND, and N.C. pin) differ significantly from the 16-pin DG403 or 14-pin DG211. Board redesign is required for migration. However, the MAX333ACAP offers superior specs - including lower on-resistance match, guaranteed B-B-M, and higher ESD rating - justifying the layout update in new designs targeting improved performance and reliability.