Analog Devices Inc./Maxim Integrated MAX336EWI

Overview

MAX336EWI from Maxim Integrated is a 16-channel, single-ended CMOS analog multiplexer designed to route one of 16 bidirectional analog inputs (NO1–NO16) to a common output (COM) under 4-bit binary address control (A0–A3). It features ≤400Ω on-resistance (max), <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 dual supplies or +4.5V to +30V single supply.

For engineers reviewing the MAX336EWI datasheet, MAX336EWI pinout, MAX336EWI application, or MAX336EWI equivalent, key selection criteria include rail-to-rail bidirectional signal handling, guaranteed low leakage across temperature, TTL/CMOS-compatible enable and address inputs, ESD protection >2000V, and pin compatibility with DG506 for drop-in replacement in legacy test equipment and instrumentation designs.

Technical Context

The MAX336EWI implements a monolithic BiCMOS decoder-switch architecture with integrated level-shifting logic, enabling full TTL/CMOS compatibility across its ±4.5V to ±18V supply range. Its switch array uses matched FET pairs to achieve ≤10Ω on-resistance matching between channels and supports break-before-make switching with ≤50ns interval.

Signal integrity is maintained via <2pF logic input capacitance, <22pF COM-on capacitance, and -82dB off isolation at 100kHz-critical for high-impedance sensor interfaces and low-distortion audio routing where crosstalk (<-86dB) and THD (<0.001% at 1kHz) must be tightly controlled.

Key Specifications

Pinout & Package

MAX336EWI is housed in a 28-pin Wide SO (SOIC-W) package with 300-mil body width and standard gull-wing leads. Pin 1 is marked by a notch or dot; pin numbering follows counterclockwise convention from top-left corner.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADG1606BRUZ and TMUX1308PWR, the MAX336EWI uniquely combines parallel 4-bit addressing, dual-supply operation up to ±20V, and sub-20pA leakage-making it irreplaceable in mains-powered precision test gear requiring zero-layout-change DG506 upgrades.

Availability

MAX336EWI is available at Aetrix Electronics and suitable for precision data acquisition, automated test equipment, medical instrumentation, and industrial process monitoring requiring stable component supply across extended temperature ranges.

Supply support for MAX336EWI 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, mixed-signal, and power management ICs for industrial, medical, and communications applications.

The MAX336EWI belongs to Maxim's precision analog multiplexer product line, engineered specifically for low-leakage, low-charge-injection signal routing in metrology-grade instrumentation and automated test systems.

FAQ

What is the maximum allowable supply voltage difference for MAX336EWI?

The MAX336EWI specifies an absolute maximum voltage difference of 44V between V+ and V− pins. This allows operation with asymmetric supplies such as +24V and −5V (29V total), provided each rail stays within its individual rating: V+ must not exceed +44V relative to V−, and V− must not fall below −0.3V relative to V+. Exceeding 44V differential risks permanent damage due to internal junction breakdown.

Does MAX336EWI support true bidirectional signal flow?

Yes, MAX336EWI supports fully bidirectional analog signal flow on all NO1–NO16 and COM terminals. Its CMOS switch architecture imposes no intrinsic directionality-the device functions identically as a multiplexer (16:1) or demultiplexer (1:16) without performance degradation. Signal polarity, amplitude, and slew rate are unrestricted within the ±15V analog range, and on-resistance remains symmetric regardless of current direction.

How does the enable pin (EN) affect leakage performance in MAX336EWI?

When EN is logic low, MAX336EWI places all 16 switches in high-impedance off-state, reducing NO-off leakage to <0.02nA and cutting supply current to ≤1µA. This state actively blocks signal paths while minimizing power consumption-critical for battery-backed data loggers. Unlike passive disable modes, the EN-controlled shutdown guarantees leakage specifications are met across the full −40°C to +85°C operating range.

Can MAX336EWI operate with a single +5V supply?

Yes, MAX336EWI operates with a single +5V supply (V+ = +5V, V− = GND), but analog signal range is reduced to 0V–5V and on-resistance increases to 700Ω (max). Transition time degrades to 600ns, and leakage currents rise slightly. For optimal performance-especially in precision applications-use ≥±12V dual supplies or ≥+12V single supply to maintain RON ≤400Ω and tTRANS ≤500ns.

What is the purpose of the N.C. pins on MAX336EWI?

The N.C. pins (pins 2, 3, and 13) on MAX336EWI have no internal connection-no bond wires, no circuit traces, no parasitic capacitance to active nodes. They must remain unconnected on PCBs; soldering or routing to these pins introduces risk of mechanical stress fracture or unintended coupling. Their presence accommodates die pad layout constraints in the 28-pin Wide SO package and does not indicate future functionality.