Analog Devices Inc./Maxim Integrated MAX4659EUA+T

Overview

MAX4659EUA+T from Maxim Integrated is a single-pole/double-throw (SPDT) CMOS analog switch with 25Ω max on-resistance at ±15V, 75mA continuous current handling, and rail-to-rail signal capability across ±4.5V to ±20V dual supplies or +9V to +40V single supply - used in high-reliability audio routing and xDSL modem signal path switching.

For engineers reviewing the MAX4659EUA+T datasheet, MAX4659EUA+T pinout, MAX4659EUA+T application, or MAX4659EUA+T equivalent, key selection criteria include verified SPDT topology, guaranteed 1nA max off-leakage at +25°C, 225MHz -3dB bandwidth, and µMAX-8 package thermal performance for industrial-grade analog switching.

Technical Context

The MAX4659EUA+T implements a parallel N-channel/P-channel MOSFET switch architecture with body-node sensing to eliminate conventional 600mV voltage-drop limitation, enabling full rail-to-rail conduction without increased leakage or supply current penalty. Its break-before-make timing is tightly controlled at ≤10ns (typ) under 35pF load.

Dual-supply operation supports asymmetrical configurations (e.g., V+ = +12V, V− = −5V), while logic inputs are TTL/CMOS-compatible with VIH = 2.4V min and VIL = 0.8V max. Charge injection is limited to 1.5pC (typ), critical for precision sample-and-hold and multiplexer applications.

Key Specifications

Pinout & Package

The MAX4659EUA+T is housed in an 8-pin µMAX package (U8-1 code) with exposed paddle thermally connected to V+ or left unconnected per layout requirements.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX4659EUA+T, MAX4660EUA+T delivers 2× continuous current and superior thermal performance in identical footprint, while DG419DY-T1-E3 offers pin-compatible legacy support at reduced current and bandwidth - making MAX4659EUA+T the optimal balance of speed, current, and thermal efficiency for mid-range industrial analog switching.

Availability

MAX4659EUA+T is available at Aetrix Electronics and suitable for audio signal routing, xDSL modem line interface, and relay replacement in test equipment requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for MAX4659EUA+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 semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, communications, and computing markets.

The MAX4659EUA+T belongs to Maxim's high-current analog switch product line, designed specifically for robust, low-RON signal routing in telecom infrastructure, test instrumentation, and industrial control systems demanding reliability beyond electromechanical solutions.

FAQ

What is the maximum continuous current rating for the MAX4659EUA+T?

The MAX4659EUA+T supports ±75mA continuous current through its COM, NO, and NC terminals under specified thermal conditions. This rating applies across the full operating temperature range (−40°C to +85°C) and is validated at ±15V dual supply. Exceeding this current risks exceeding the 362mW power dissipation limit of the µMAX package, potentially triggering thermal shutdown or long-term reliability degradation. Always verify PCB copper area and airflow when operating near rated limits.

Does the MAX4659EUA+T require a separate logic supply voltage (VL)?

No, the MAX4659EUA+T does not require a separate VL supply. Its digital control input (IN) is fully TTL/CMOS-compatible, accepting 0.8V (max) logic-low and 2.4V (min) logic-high thresholds directly from standard 3.3V or 5V logic families. This eliminates the need for level-shifting circuitry or auxiliary supplies, simplifying design in mixed-voltage systems where V+ and V− may be ±15V or +24V.

Can the MAX4659EUA+T operate from an asymmetric dual supply, such as V+ = +12V and V− = −5V?

Yes, the MAX4659EUA+T supports asymmetric dual-supply operation as long as the total V+ to V− differential remains within the absolute maximum rating of +44V and each supply stays within its respective −0.3V to +44V (V+ to GND) or −44V to +0.3V (V− to GND) limits. Asymmetric configurations are explicitly supported in the datasheet and enable optimized dynamic range for unipolar or offset analog signals without compromising RON or leakage performance.

What is the typical charge injection value for the MAX4659EUA+T, and why does it matter?

The MAX4659EUA+T exhibits 1.5pC typical charge injection (Q), measured with VGEN = 0, RGEN = 0, and CL = 1nF. This parameter directly impacts settling time and DC offset in sample-and-hold circuits and multiplexed ADC front-ends. Low Q minimizes voltage glitch on high-impedance nodes - for example, in a 10kΩ source impedance, 1.5pC injects only 0.15mV error - preserving measurement accuracy in precision data acquisition systems.

Is the exposed paddle on the MAX4659EUA+T package required to be connected to V+?

The exposed paddle on the MAX4659EUA+T µMAX package may be connected to V+ for improved thermal performance or left unconnected with no functional impact. Maxim's datasheet explicitly states "exposed paddle connected to V+ or left unconnected." Connecting to V+ reduces thermal resistance by ~30°C/W and is recommended for continuous operation above 50mA, but floating the paddle maintains full electrical functionality and meets all specifications under derated power conditions.