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 (NO1–NO16) to a common output (COM) under 4-bit binary address control (A0–A3). It features 400Ω max on-resistance, <20pA NO-off leakage at +25°C, and rail-to-rail signal handling across ±4.5V to ±20V dual or +4.5V to +30V single supplies. It serves precision data acquisition systems requiring low charge injection (3.5pC typ) and high off-isolation (−82dB).

For engineers reviewing the MAX336CWI+ datasheet, MAX336CWI+ pinout, MAX336CWI+ application, or MAX336CWI+ equivalent, key selection criteria include guaranteed on-resistance matching (≤10Ω), TTL/CMOS-compatible enable and address inputs, >2000V ESD protection, and pin-compatibility with industry-standard DG506 - all critical for test equipment and signal routing designs demanding low leakage and fast switching.

Technical Context

The MAX336CWI+ implements a monolithic BiCMOS decoder-driven switch matrix with break-before-make timing (10–50ns) and bidirectional conduction. Its control logic accepts TTL/CMOS-level inputs (0.8V to 2.4V) across full temperature range and supply voltages, enabling direct interfacing with microcontrollers and FPGAs without level-shifting.

It supports both single-supply (V− tied to GND) and dual-supply operation, with analog signal range extending from V− to V+ (e.g., −15V to +15V or 0V to +12V). Charge injection (3.5pC typ) and off-capacitance (2pF NO-off, 20pF COM-off) are tightly controlled to minimize settling error and crosstalk (−86dB) in high-precision sampling paths.

Key Specifications

Pinout & Package

MAX336CWI+ uses a 28-pin Wide SO (W28+6) package, RoHS-compliant and lead-free (+ suffix), with 11.5mm × 7.6mm body and 1.27mm pitch.

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 manufacturability in reflow processes and lower thermal impedance; compared with DG506ACJ+, it delivers 4.5× lower leakage, 2× lower RON, and 2× higher ESD tolerance - directly enabling higher accuracy and longer field life in modern instrumentation.

Availability

MAX336CWI+ is available at Aetrix Electronics and suitable for precision data acquisition, automated test equipment, medical instrumentation signal routing, and industrial process control I/O modules requiring stable component supply and long-term obsolescence management.

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 product line was engineered specifically for low-leakage, low-charge-injection analog multiplexing in precision measurement systems - emphasizing rail-to-rail operation, TTL compatibility, and robustness in harsh electrical environments.

FAQ

What is the maximum operating temperature range for the MAX336CWI+?

The MAX336CWI+ is rated for 0°C to +70°C ambient operation, as indicated by the "C" grade in its part number. This commercial temperature range is validated across all electrical specifications including on-resistance (500Ω max over temperature), leakage currents, and switching times. The device uses a Wide SO package optimized for thermal dissipation within this range, and derating guidelines specify 12.50mW/°C above +70°C for continuous power handling.

Does the MAX336CWI+ support single-supply operation?

Yes, the MAX336CWI+ fully supports single-supply operation from +4.5V to +30V. In this configuration, the V− pin must be connected to GND, and the analog signal range becomes 0V to V+. For example, with V+ = +12V, the usable analog range is 0V to +12V. All control inputs (A0–A3, EN) remain TTL/CMOS-compatible, and key parameters like on-resistance (460–700Ω) and transition time (350–600ns) are specified under single-supply conditions in the datasheet.

Is the MAX336CWI+ pin-compatible with the DG506?

Yes, the MAX336CWI+ is explicitly designed as a pin-compatible upgrade for the DG506. Pin assignments for V+, V−, GND, COM, NO1–NO16, A0–A3, and EN match identically in the 28-pin Wide SO footprint. No PCB layout changes are required for replacement. However, the MAX336CWI+ improves upon the DG506 with lower on-resistance (400Ω vs. 900Ω), lower leakage (<20pA vs. 100pA), and higher ESD rating (>2000V vs. 1000V), delivering measurable performance gains without hardware modification.

What is the typical charge injection value for the MAX336CWI+ and why does it matter?

The MAX336CWI+ has a typical charge injection value of 3.5pC, measured with CL = 100pF and RS = 0Ω at +25°C. This parameter quantifies the net charge transferred to the output node during channel switching, which causes a voltage glitch on sampling capacitors. In precision data acquisition, low charge injection directly reduces settling time and harmonic distortion - enabling faster throughput and higher effective resolution (e.g., preserving ENOB in 16-bit+ ADC systems) without additional blanking or correction circuitry.

Can the MAX336CWI+ be used in bidirectional signal paths?

Yes, the MAX336CWI+ is fully bidirectional: its analog switches conduct equally well in both directions, with matched on-resistance and leakage characteristics between NOx and COM terminals. This allows flexible use as either a multiplexer (16:1) or demultiplexer (1:16), and supports applications such as programmable gain amplifiers, relay replacements, and signal path reversal in test fixtures - all without polarity constraints or performance degradation based on signal flow direction.