Analog Devices Inc./Maxim Integrated MAX4647EUT

Overview

MAX4647EUT from Maxim Integrated is a single-pole/single-throw (SPST) analog switch with normally closed (NC) configuration, designed for rail-to-rail signal routing in high-voltage analog systems. It features 25Ω max on-resistance at ±15V supplies, 2Ω max R_ON flatness, 1nA max off-leakage at +25°C, and operates across -40°C to +85°C. It is used in telecom signal switching, DSL line interface modules, and avionics redundancy circuits.

For engineers reviewing the MAX4647EUT datasheet, MAX4647EUT pinout, MAX4647EUT application, or MAX4647EUT equivalent, key selection criteria include dual-supply operation (±4.5V to ±20V), SOT23-6 package compatibility, NC logic polarity, sub-100ns switching speed, and guaranteed R_ON flatness over full signal range.

Technical Context

The MAX4647EUT implements a CMOS transmission-gate architecture optimized for low distortion and minimal charge injection in bidirectional analog signal paths. Its control logic accepts standard TTL/CMOS levels without requiring a separate VL supply, and its internal level-shifting enables reliable operation across wide supply ranges.

It supports both dual-supply (±4.5V to ±20V) and single-supply (+9V to +36V) configurations, with analog signal handling spanning the full V− to V+ rails. The device maintains tight R_ON flatness (≤2Ω) and low THD (0.006% typical) under varying load and temperature conditions.

Key Specifications

Pinout & Package

The MAX4647EUT is housed in a lead-free 6-pin SOT23 package (package code U6SN-1), with 1.3mm × 2.2mm footprint and 0.95mm height, suitable for space-constrained PCB layouts in telecom and portable instrumentation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX4648EUT-T+, the MAX4647EUT provides fail-safe NC operation ideal for uninterrupted signal paths; versus ADG1419BRMZ, it delivers lower on-resistance and leakage at the cost of no integrated fault protection-making it preferred for high-fidelity telecom and test equipment where supply sequencing is controlled.

Availability

MAX4647EUT is available at Aetrix Electronics and suitable for telecommunications infrastructure, DSL line interface modules, and avionics redundancy systems requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MAX4647EUT 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 applications.

The MAX4647/MAX4648 family was engineered for high-voltage, low-distortion analog switching in telecom and test equipment-delivering rail-to-rail operation, guaranteed R_ON flatness, and ultra-low leakage in miniature SOT23 packages.

FAQ

What is the logic polarity of the MAX4647EUT control input?

The MAX4647EUT has active-low logic: when the IN pin is at logic low (≤0.8V), the NC-to-COM switch closes; when IN is at logic high (≥2.4V), the switch opens. This normally closed behavior ensures signal continuity during power-up or controller reset. The MAX4647EUT does not require a separate logic supply voltage (VL), accepting standard TTL/CMOS levels referenced to GND.

Can the MAX4647EUT operate from a single supply?

Yes, the MAX4647EUT supports single-supply operation from +9V to +36V (e.g., +12V), with analog signals ranging from 0V to V+. In this mode, V− is connected to GND. While R_ON increases slightly (60Ω max at +12V vs. 25Ω at ±15V), the device retains rail-to-rail capability, 100ns switching, and 1nA leakage-making it viable for industrial I/O and PC multimedia boards where dual supplies are impractical.

How does the MAX4647EUT handle overvoltage conditions on analog pins?

The MAX4647EUT includes internal ESD diodes that clamp analog pins (NO, NC, COM) to V+ and V−. To avoid damage, forward diode current must be limited to ±60mA continuous or ±100mA peak (1ms, 10% duty cycle). For robust overvoltage protection beyond absolute maximum ratings (e.g., ±44V V+–V−), external series diodes are recommended-but only in dual-supply configurations, as they reduce signal range by ~1.4V and are not advised for single-supply use.

What is the significance of R_ON flatness in the MAX4647EUT?

R_ON flatness (≤2Ω max) refers to the variation in on-resistance across the full analog signal range (V− to V+). Unlike switches with highly nonlinear R_ON, the MAX4647EUT maintains nearly constant resistance regardless of signal voltage-critical for minimizing harmonic distortion (<0.006% THD) and preserving amplitude accuracy in audio, instrumentation, and broadband communication signals routed through the MAX4647EUT.

Is the MAX4647EUT pin-compatible with other SOT23-6 analog switches?

The MAX4647EUT uses a standard SOT23-6 pinout (NC, V−, IN, GND, V+, COM), matching industry conventions for SPST analog switches. However, pin compatibility does not guarantee functional equivalence: the MAX4647EUT's NC configuration differs from NO devices like MAX4648EUT-T+, and its ±20V dual-supply range exceeds many SOT23-6 switches rated only for ±15V. Always verify logic polarity, supply limits, and R_ON specs before substitution.