Analog Devices Inc./Maxim Integrated MAX337CWI+T

Overview

MAX337CWI+T from Maxim Integrated is a dual 8-channel CMOS analog multiplexer designed to route one of eight differential inputs (A or B side) to its respective common output under 3-bit binary address control. It features 400Ω max on-resistance, <20pA NO-off leakage at +25°C, and bidirectional rail-to-rail signal handling across ±4.5V to ±20V dual supplies or +4.5V to +30V single supply. It serves precision data acquisition systems requiring low charge injection (3.5pC typ) and high off-isolation (–82dB).

For engineers reviewing the MAX337CWI+T datasheet, MAX337CWI+T pinout, MAX337CWI+T application, or MAX337CWI+T equivalent, key selection criteria include guaranteed low leakage performance over temperature, TTL/CMOS-compatible enable/address inputs, ESD protection >2000V (Method 3015.7), and pin-compatibility with industry-standard DG507 for drop-in upgrades in test equipment and signal routing designs.

Technical Context

The MAX337CWI+T implements a dual independent 8:1 analog mux architecture with separate COMA/COMB outputs and NO1A–NO8A / NO1B–NO8B input banks. Each channel uses matched CMOS transmission gates controlled by decoded A0–A2 and EN logic, supporting break-before-make switching (10–50ns t_OPEN) and sub-500ns transition time.

All digital inputs are TTL/CMOS-compatible (0.8V to 2.4V thresholds) across full temperature range and supply voltages. The BiCMOS process enables rail-to-rail analog signal handling (±15V range with ±15V supplies), while internal clamping diodes protect against overvoltage transients-provided supply sequencing follows V+ → V− → logic inputs.

Key Specifications

Pinout & Package

MAX337CWI+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 1.27mm; thermal pad not present.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX337CAI+, the MAX337CWI+T offers identical performance but greater ease of hand-soldering and thermal dissipation; compared with DG507ACJ, it delivers measurable improvements in leakage, charge injection, and ESD robustness-justifying upgrade in medical, test, and precision measurement systems.

Availability

MAX337CWI+T is available at Aetrix Electronics and suitable for precision data acquisition, automated test equipment, medical instrumentation, and industrial signal routing requiring stable component supply and long-term manufacturability.

Supply support for MAX337CWI+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) 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/MAX337 product line was engineered for low-leakage, low-charge-injection analog signal routing in precision measurement and test systems-prioritizing parameter guarantees over temperature and supply variations.

FAQ

What supply voltage ranges does the MAX337CWI+T support?

The MAX337CWI+T operates from a single +4.5V to +30V supply or dual ±4.5V to ±20V supplies. When using single supply, V− must be tied to GND. Supply sequencing requires V+ powered first, then V−, then logic inputs. Exceeding ±20V on either rail violates absolute maximum ratings and risks permanent damage to the MAX337CWI+T.

Is the MAX337CWI+T pin-compatible with the DG507?

Yes-the MAX337CWI+T is explicitly specified as a plug-in upgrade for the DG507. Pin functions, numbering, and package outline (28-pin Wide SO) match exactly. No PCB layout changes are needed when replacing DG507 with MAX337CWI+T, though design verification should confirm improved leakage and charge injection meet system requirements.

What is the maximum analog signal voltage range supported by the MAX337CWI+T?

With ±15V dual supplies, the MAX337CWI+T supports analog signals from –15V to +15V on all NO and COM pins. Under +12V single supply (V− = GND), the range is 0V to +12V. Signal voltages beyond V+ or below V− are clamped by internal diodes-limiting forward current to 30mA continuous or 100mA pulsed to avoid damage to the MAX337CWI+T.

Does the MAX337CWI+T support differential signaling?

The MAX337CWI+T does not implement true differential switching (e.g., fully differential pairs). However, its dual 8-channel architecture-with independent COMA/COMB and NOxA/NOxB banks-enables pseudo-differential routing: one bank handles positive-phase signals, the other negative-phase, with synchronized address control. This configuration is widely used in instrumentation-grade signal routing where matched timing and leakage matter more than integrated differential receivers.

How is charge injection specified for the MAX337CWI+T, and why does it matter?

Charge injection for the MAX337CWI+T is guaranteed at 3.5pC typical (10pC max), measured with CL = 100pF, VNO = 0V, and RS = 0Ω. This parameter directly impacts sampling accuracy in switched-capacitor circuits and sample-and-hold stages: lower charge injection reduces voltage glitches on hold capacitors, preserving DC precision and minimizing settling time. In high-resolution data acquisition, exceeding 5pC can introduce measurable offset errors-making the MAX337CWI+T's 3.5pC typ value critical for 16-bit+ systems.