Analog Devices Inc./Maxim Integrated MAX4647EUT+T

Overview

MAX4647EUT+T from Maxim Integrated is a single-pole/single-throw (SPST) analog switch with normally closed (NC) configuration, designed for high-fidelity signal routing in precision analog systems. It delivers 25Ω max on-resistance, 2Ω max on-resistance flatness over rail-to-rail signal range, and 1nA max off-leakage at +25°C, operating from dual ±4.5V to ±20V or single +9V to +36V supplies in a 6-pin SOT23 package - ideal for telecom line-card switching and test equipment multiplexing.

For engineers reviewing the MAX4647EUT+T datasheet, MAX4647EUT+T pinout, MAX4647EUT+T application, or MAX4647EUT+T equivalent, key selection criteria include guaranteed R_ON flatness, ±15V dual-supply compatibility, rail-to-rail analog handling, low charge injection (4pC), and SOT23-6 footprint suitability for space-constrained PCB layouts.

Technical Context

The MAX4647EUT+T implements a CMOS-based SPST switch architecture with complementary transistor pairs enabling bidirectional conduction and true rail-to-rail signal swing. Its logic input accepts standard TTL/CMOS levels without requiring a separate VL supply, simplifying system-level voltage translation.

It features internal ESD protection and operates across –40°C to +85°C with guaranteed performance over full temperature range via design correlation. The device maintains low distortion (0.006% THD) and high off-isolation (–92dB at 1MHz), supporting high-fidelity audio and broadband instrumentation signal paths.

Key Specifications

Pinout & Package

MAX4647EUT+T is housed in a 6-pin SOT23 package (package code U6SN-1), with 1.6mm × 2.9mm footprint and 0.95mm height - optimized for high-density PCB layouts in portable and modular equipment.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX4647EUT+T, MAX4648EUT+T offers identical electrical performance but inverted logic state behavior, while ADG1419BRMZ-REEL trades lower R_ON flatness for integrated protection - making MAX4647EUT+T optimal for cost-sensitive, NC-required telecom and test applications where simplicity and rail-to-rail fidelity are prioritized.

Availability

MAX4647EUT+T is available at Aetrix Electronics and suitable for telecommunications infrastructure, automated test equipment, and avionics sensor interface designs requiring stable component supply, long-term lifecycle support, and lead-free RoHS-compliant packaging.

Supply support for MAX4647EUT+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 fabless semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, communications, and computing markets.

The MAX4647/MAX4648 family was engineered for precision analog signal routing in space-constrained, high-reliability systems - targeting telecom line cards, test instrumentation, and safety-critical sensor interfaces where NC default behavior and rail-to-rail fidelity are essential.

FAQ

What is the logic polarity of the MAX4647EUT+T control input?

The MAX4647EUT+T features active-low logic control: when the IN pin is at logic low (≤0.8V), the NC switch is closed (COM connected to NC); when IN is at logic high (≥2.4V), the switch opens. This NC default behavior ensures signal continuity during power-up or controller reset - a key requirement in PBX and avionics fail-safe designs. The MAX4647EUT+T does not require a separate VL supply to interpret TTL/CMOS logic levels.

Can the MAX4647EUT+T operate from a single +12V supply?

Yes, the MAX4647EUT+T supports single-supply operation from +9V to +36V. When using +12V, V− is connected to GND (pin 2 → pin 4), and the analog signal range becomes 0V to +12V. On-resistance increases to 60Ω max under these conditions, and R_ON flatness degrades to 8Ω max - still suitable for non-critical routing, though dual ±15V yields optimal 25Ω/2Ω performance. The MAX4647EUT+T maintains full functionality including 1nA leakage and 100ns switching in single-supply mode.

What is the maximum allowable voltage difference between V+ and V− for the MAX4647EUT+T?

The absolute maximum rating for V+ to V− differential is +44.0V. This means the device can safely operate with V+ = +20V and V− = −20V (40V total), or V+ = +36V and V− = 0V (36V total), but not beyond 44V. Exceeding this limit risks permanent damage due to junction breakdown. The MAX4647EUT+T datasheet specifies guaranteed operation up to ±20V supplies, and all electrical characteristics - including R_ON, leakage, and switching speed - are validated within that range.

How does charge injection affect system performance with the MAX4647EUT+T?

Charge injection of 4pC typical in the MAX4647EUT+T causes transient voltage glitches at the COM node during switching, which can corrupt sampled data in ADC front-ends or induce audible clicks in audio paths. Its impact scales with load capacitance (ΔV = Q/C_L); for example, with 100pF load, glitch amplitude is ~40mV. System designers mitigate this by minimizing stray capacitance at COM, using guard traces, or adding small series resistance before the switch. The MAX4647EUT+T's low value makes it among the best-in-class for precision sampling applications.

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

No - the MAX4647EUT+T has a proprietary pinout optimized for NC topology: Pin 1 = NC, Pin 2 = V−, Pin 3 = IN, Pin 4 = GND, Pin 5 = V+, Pin 6 = COM. This differs from industry-standard SOT23-6 analog switches like the ADG1419 (Pin 1 = V+, Pin 2 = IN, Pin 3 = GND, etc.). Direct replacement would require PCB redesign. Always verify pin mapping against the MAX4647EUT+T top-view diagram before layout - misrouting V− or GND can cause latch-up or parametric failure.