Analog Devices Inc./Maxim Integrated MAX306CWI+T

Overview

MAX306CWI+T from Maxim Integrated is a precision 1-of-16 single-ended CMOS analog multiplexer with <100Ω on-resistance, <5Ω channel-to-channel matching, and <10pC charge injection. It operates from +5V to +30V single supply or ±4.5V to ±20V dual supplies, supports rail-to-rail signal handling up to ±15V, and targets high-accuracy sample-and-hold and test equipment signal routing.

For engineers reviewing the MAX306CWI+T datasheet, MAX306CWI+T pinout, MAX306CWI+T application, or MAX306CWI+T equivalent, key selection criteria include guaranteed on-resistance flatness (≤7Ω), low leakage (<2.5nA at +85°C), ESD protection (>2000V), and plug-in compatibility with DG406/DG506A in wide SO-28 packaging.

Technical Context

The MAX306CWI+T implements a monolithic CMOS decoder-multiplexer architecture with four address lines (A0–A3), active-high enable (EN), and bidirectional COM/NO switching paths. Its silicon-gate process ensures matched R_ON across all 16 channels and minimal charge injection during switching-critical for low-distortion sampling.

It supports TTL/CMOS logic inputs with ≤1µA input current, operates over 0°C to +70°C, and maintains specified performance under both unbalanced (e.g., +24V/–5V) and symmetric supply configurations. Signal integrity is preserved via rail-to-rail analog range and <92dB crosstalk suppression at 100kHz.

Key Specifications

Pinout & Package

MAX306CWI+T is housed in a 28-pin Wide SO (SOIC-W) package with 300 mil body width and standard gull-wing leads. Pin pitch is 0.050", and thermal pad is not present.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADG406BRZ and TMUX1308PWR, MAX306CWI+T uniquely delivers guaranteed <5Ω R_ON matching, dual-supply flexibility, and industry-standard pinout-making it the preferred choice for precision, high-voltage, and drop-in-replacement designs.

Availability

MAX306CWI+T is available at Aetrix Electronics and suitable for sample-and-hold circuits, automated test equipment, and battery-operated instrumentation requiring stable component supply, long-lifecycle assurance, and RoHS-compliant packaging.

Supply support for MAX306CWI+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) designs high-performance analog and mixed-signal ICs for industrial, automotive, and communications markets, with emphasis on precision, reliability, and integration.

The MAX306CWI+T belongs to Maxim's precision analog multiplexer product line, engineered specifically for applications demanding low distortion, high channel count, and robust operation across extended temperature and supply ranges.

FAQ

What is the maximum analog signal range supported by the MAX306CWI+T?

The MAX306CWI+T supports an analog signal range from V− to V+, which spans ±15V under dual-supply operation (+15V/−15V) or 0V to +12V under single +12V supply. This rail-to-rail capability allows direct interfacing with sensors and amplifiers without level-shifting circuitry, and the device maintains specified R_ON flatness and leakage performance across this full range. The absolute maximum ratings permit V+ up to +44V referenced to V−, but signal range remains bounded by supply rails.

Does the MAX306CWI+T require external pull-up resistors on its address or enable pins?

No, the MAX306CWI+T does not require external pull-up resistors on A0–A3 or EN. Its CMOS inputs exhibit ≤1µA leakage across the full temperature range and are fully compatible with standard TTL/CMOS logic levels (VAL ≤ 0.8V, VAH ≥ 2.4V). Internal input structure eliminates the need for external biasing, simplifying PCB layout and reducing component count in microcontroller-driven multiplexer systems.

Can the MAX306CWI+T operate with unbalanced supplies such as +24V and −5V?

Yes, the MAX306CWI+T supports unbalanced supplies including +24V and −5V, provided the difference between V+ and V− does not exceed +44V and each supply remains within its absolute maximum rating (V+ ≤ +44V, V− ≥ −0.3V). In such configurations, the analog signal range becomes V− to V+, i.e., −5V to +24V, and all electrical specifications-including leakage, R_ON, and switching speed-remain valid per the datasheet conditions.

How does the MAX306CWI+T compare to the DG406 in terms of ESD robustness?

The MAX306CWI+T provides >2000V HBM ESD protection, significantly exceeding the typical 200V–500V rating of legacy DG406 devices. This enhanced robustness is achieved through Maxim's improved 44V silicon-gate process and eliminates the need for external ESD clamps in many industrial and field-deployed applications. As a plug-in upgrade, MAX306CWI+T retains identical pinout and logic behavior while delivering superior reliability in electrostatic-prone environments.

Is the MAX306CWI+T suitable for use in aerospace or military-grade systems?

The MAX306CWI+T is rated for 0°C to +70°C operation and packaged in commercial-grade Wide SO. While it shares core architecture with military-qualified variants like MAX306MJI (−55°C to +125°C, CERDIP), the MAX306CWI+T itself is not screened or certified to MIL-STD-883. For aerospace or military programs requiring extended temperature, radiation tolerance, or qualification testing, designers should specify the MAX306MJI or consult Aetrix Electronics for qualified alternatives meeting specific program requirements.