Analog Devices Inc./Maxim Integrated MAX336CWI

Overview

MAX336CWI from Maxim Integrated is a 16-channel single-ended CMOS analog multiplexer designed to route one of 16 bidirectional analog inputs to a common COM output under 4-bit binary address control. It features 400Ω max on-resistance, <20pA NO-off leakage at +25°C, and 3.5pC typical charge injection-enabling precision signal routing in data acquisition systems operating from ±4.5V to ±20V or +4.5V to +30V supplies.

For engineers reviewing the MAX336CWI datasheet, MAX336CWI pinout, MAX336CWI application, or MAX336CWI equivalent, this page delivers verified specifications, package mapping to 28-pin Wide SO, functional truth table alignment, rail-to-rail bidirectional signal handling, and direct upgrade path from DG506/DG507 in test equipment and precision instrumentation designs.

Technical Context

The MAX336CWI implements a monolithic BiCMOS decoder-driven analog switch matrix with TTL/CMOS-compatible address and enable inputs (0.8V–2.4V logic thresholds) across full temperature range and supply voltages. Its internal architecture guarantees break-before-make switching (10–50ns), low crosstalk (–86dB), and high off-isolation (–82dB) at 100kHz.

All 16 NO terminals and COM are fully bidirectional, supporting rail-to-rail analog signals from V– to V+, with guaranteed performance over ±4.5V to ±20V dual supplies or +4.5V to +30V single supply (V– tied to GND). ESD protection exceeds 2000V per Method 3015.7 without external components.

Key Specifications

Pinout & Package

MAX336CWI is housed in a 28-pin Wide SO (SOIC-W) package with 300-mil body width and standard gull-wing lead form. Pin pitch is 1.27mm; package code W28+6 per Maxim's outline 21-0042.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX336CAI+, the MAX336CWI offers superior moisture resistance and easier hand-soldering due to wider 1.27mm pitch; compared with DG506ACJ, it delivers 2.25× lower on-resistance, 28× lower charge injection, and certified 2000V+ ESD protection - directly improving measurement fidelity and field reliability.

Availability

MAX336CWI is available at Aetrix Electronics and suitable for precision data acquisition, automated test equipment, and industrial process monitoring requiring stable component supply across extended temperature and voltage ranges.

Supply support for MAX336CWI 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, medical, and communications applications.

The MAX336 series belongs to Maxim's precision analog switch product line, engineered specifically for low-leakage, low-charge-injection signal routing in measurement-critical systems where DC accuracy and switching integrity are non-negotiable.

FAQ

What is the maximum analog signal voltage range supported by the MAX336CWI?

The MAX336CWI supports analog signals from V− to V+ across all NO and COM pins. With ±15V dual supplies, this yields a ±15V (–15V to +15V) signal range. Under +12V single supply (V− = GND), the range is 0V to +12V. Absolute maximum ratings limit V+ to 44V above V−, but operational signal swing is constrained by supply rails.

Is the MAX336CWI pin-compatible with the DG506, and can it be used as a direct replacement?

Yes, the MAX336CWI is explicitly documented as a pin-compatible upgrade for the DG506 and DG507. All 28 pins match function-for-function, including V+, V−, GND, COM, NO1–NO16, A0–A3, EN, and N.C. pins. No PCB layout changes are required, and the MAX336CWI improves on leakage, charge injection, and ESD robustness while maintaining identical timing and logic interface behavior.

What is the typical on-resistance matching between channels of the MAX336CWI, and why does it matter?

The MAX336CWI guarantees ≤10Ω on-resistance matching (∆RON) between any two channels at +25°C. This tight matching ensures consistent gain and offset across all 16 signal paths - critical in applications like multi-channel sensor arrays or calibration systems where channel-to-channel ratio accuracy determines overall system linearity and repeatability.

Does the MAX336CWI require external ESD protection when used in handheld test equipment?

No. The MAX336CWI incorporates on-die ESD protection rated >2000V per Method 3015.7, which exceeds IEC 61000-4-2 Level 2 (±4kV contact) requirements for many portable instruments. External ESD diodes are unnecessary unless system-level testing mandates higher immunity (e.g., Level 4), in which case discrete TVS devices may supplement - but not replace - the built-in protection.

How does the MAX336CWI handle power supply sequencing, and what happens if V− is powered before V+?

The MAX336CWI requires strict sequencing: V+ must be applied first, then V−, then logic inputs (EN, A0–A3). If V− rises before V+, internal protection diodes may forward-bias, causing excessive current and potential latch-up. To prevent damage, always follow the recommended sequence - or add two series Schottky diodes (e.g., BAT54) on V+ and V− lines to enforce correct biasing during hot-plug or uncontrolled power-up scenarios.