Analog Devices Inc./Maxim Integrated MAX333AEWP+

Overview

The MAX333AEWP+ from Maxim Integrated is a precision quad SPDT analog switch IC 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 with <2Ω matching between channels, maintains ∆3Ω max on-resistance flatness over signal range, and achieves <10pC charge injection-enabling accurate DC-coupled multiplexing in 16-bit data acquisition systems.

For engineers reviewing the MAX333AEWP+ datasheet, MAX333AEWP+ pinout, MAX333AEWP+ application, or MAX333AEWP+ equivalent, key selection criteria include guaranteed rail-to-rail analog signal handling (V− to V+), break-before-make timing (10ns typical), low quiescent current (<50µA), and −40°C to +85°C industrial temperature rating in 20-pin wide SO package.

Technical Context

The MAX333AEWP+ integrates four independent CMOS SPDT switches on a single monolithic die using Maxim's silicon-gate process, enabling precise analog signal path control without external level-shifting. Its logic inputs are TTL/CMOS-compatible across supply voltages (VIH = +0.8V to +2.4V), and analog terminals tolerate full rail-to-rail voltage swings (VCOM/VNO/VNC = V− to V+) without damage.

Switching performance is characterized under both dual-supply (±15V) and single-supply (+12V) conditions: turn-on time <175ns, turn-off time <145ns, off-isolation >72dB at 1MHz, and crosstalk <78dB-ensuring minimal channel interaction in multi-channel signal conditioning circuits.

Key Specifications

Pinout & Package

MAX333AEWP+ is housed in a 20-pin wide SO (SOIC-W) package with 0.300" body width and standard 0.050" lead pitch. 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 outputs (NO1–NO4); pins 3,8,13,18 are common poles (COM1–COM4); pins 4,7,14,17 are normally closed outputs (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 ADG408BRUZ and TS5A3157DCKR, the MAX333AEWP+ uniquely provides quad SPDT topology with guaranteed RON matching and rail-to-rail operation across ±20V and +30V supplies-making it irreplaceable for precision industrial multiplexing where channel correlation and wide dynamic range are mandatory.

Availability

MAX333AEWP+ is available at Aetrix Electronics and suitable for test equipment, communications infrastructure, PBX systems, and portable instrumentation requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MAX333AEWP+ 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, communications, and consumer applications.

The MAX333A product line delivers precision analog switching solutions targeting applications demanding low distortion, tight parameter matching, and robust operation in harsh electrical environments-particularly where rail-to-rail signal handling and low charge injection are critical.

FAQ

What is the maximum analog signal voltage range supported by the MAX333AEWP+?

The MAX333AEWP+ supports rail-to-rail analog signal handling: VCOM, VNO, and VNC terminals operate from V− to V+ across the full supply range. With ±15V supplies, this yields a ±15V signal range; with +12V single supply (V− = GND), it supports 0V to +12V. Absolute maximum ratings allow VNO–VNC up to 32V, but functional range remains bounded by supply rails.

Does the MAX333AEWP+ require external charge pumps or level shifters for logic interfacing?

No. The MAX333AEWP+ features TTL/CMOS-compatible logic inputs with VIH specified from +0.8V to +2.4V and VIL from V− to +0.8V-guaranteed across all supply configurations. This allows direct connection to 3.3V or 5V microcontrollers without level-shifting circuitry, simplifying system design and reducing BOM count.

Can the MAX333AEWP+ be used in single-supply +5V systems?

No. The MAX333AEWP+ minimum single-supply voltage is +10V per its datasheet specifications. Attempting operation below +10V violates the absolute minimum supply requirement and risks undefined switching behavior, increased on-resistance, and potential latch-up. For +5V systems, consider alternatives like the TS5A3157 or ADG1419.

What is the thermal performance of the MAX333AEWP+ in its wide SO package?

The MAX333AEWP+ in 20-pin wide SO package has a thermal resistance θJA of 100°C/W (typical). At maximum rated power dissipation (800mW at +70°C ambient), junction temperature rise is ~80°C-keeping total TJ ≤ +150°C. Derating is 10.00mW/°C above +70°C, ensuring reliable operation up to +85°C ambient with appropriate PCB copper area.

How does the MAX333AEWP+ achieve guaranteed on-resistance matching between channels?

The MAX333AEWP+ achieves <2Ω on-resistance matching through Maxim's silicon-gate process and monolithic quad layout, which ensures identical transistor geometry, doping, and thermal coupling across all four switch channels. This matching is guaranteed only under bipolar-supply operation (±4.5V to ±20V), as confirmed in the datasheet's Note 4 and Electrical Characteristics tables.