Analog Devices Inc./Maxim Integrated MAX4731EBL+

Overview

MAX4731EBL+ from Maxim Integrated is a dual, normally open (NO), single-pole/single-throw (SPST) analog switch IC operating from a single +2V to +11V supply. It delivers 50Ω maximum on-resistance at +3V, 0.1nA leakage current at +25°C, and rail-to-rail signal handling - ideal for low-power audio routing and battery-powered data-acquisition systems.

For engineers reviewing the MAX4731EBL+ datasheet, MAX4731EBL+ pinout, MAX4731EBL+ application, or MAX4731EBL+ equivalent, key selection criteria include guaranteed R_ON matching (≤3.5Ω at +3V), ultra-low quiescent power (0.5nW typ), UCSP package footprint (1.52mm × 1.52mm), and TTL/CMOS logic compatibility across supply voltages.

Technical Context

The MAX4731EBL+ implements two independent NO SPST switches in a CMOS process with internal protection diodes. Its bidirectional analog path supports signals from GND to V+, and logic inputs are rail-to-rail compatible - requiring full-swing drive (e.g., 0V/3.3V at +3.3V supply) to minimize static power.

Switching performance is characterized at +3V and +5V: t_ON ≤170ns and t_OFF ≤70ns (at +3V, 35pF load), with −108dB crosstalk and −72dB off-isolation at 1MHz. Break-before-make timing is not applicable, as the MAX4731EBL+ contains only NO switches (unlike the MAX4733).

Key Specifications

Pinout & Package

The MAX4731EBL+ is housed in a 9-bump UCSP (Ultra-Compact Silicon Package) measuring 1.52mm × 1.52mm with bottom-side bumps. This wafer-level chip-scale package eliminates leads and minimizes parasitic inductance/capacitance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX4731EUA+, the MAX4731EBL+ saves >70% board area and improves thermal response; compared with ADG702BRMZ-REEL7, it supports higher supply voltages (+11V) and achieves superior off-isolation (−72dB vs. −85dB), but lacks automotive qualification.

Availability

MAX4731EBL+ is available at Aetrix Electronics and suitable for portable audio routing, low-voltage data acquisition, and battery-powered instrumentation requiring stable component supply and long-term lifecycle support.

Supply support for MAX4731EBL+ 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) designs precision analog, mixed-signal, and power-management ICs for demanding industrial, medical, and communications applications.

The MAX4731EBL+ belongs to Maxim's low-voltage analog switch family, engineered specifically for space- and power-constrained portable systems requiring rail-to-rail signal integrity and nanowatt quiescent operation.

FAQ

What is the maximum supply voltage rating for the MAX4731EBL+?

The MAX4731EBL+ has an absolute maximum V+ rating of +12V, but operational specification is guaranteed up to +11V. Exceeding +11V risks violating the device's electrical characteristics and may cause permanent damage. For reliable operation at high supply voltages, bypass V+ with a minimum 0.1µF ceramic capacitor placed as close as possible to the MAX4731EBL+ package.

Does the MAX4731EBL+ support rail-to-rail analog signal switching?

Yes, the MAX4731EBL+ supports true rail-to-rail analog signal switching - signals from GND to V+ pass through the switch with minimal R_ON variation. This is confirmed by typical R_ON vs. V_COM curves showing <9Ω flatness over the full range at +3V. The bidirectional architecture allows NO_, COM_, and NC_ pins to serve as either inputs or outputs.

How does logic-level compatibility work for the MAX4731EBL+ across different supply voltages?

The MAX4731EBL+ inputs are TTL/CMOS-compatible when V+ = +5V (VIH ≥ 2.0V, VIL ≤ 0.8V). At other supplies (e.g., +3.3V or +11V), logic inputs must be driven rail-to-rail - i.e., low = 0V, high = V+. Driving outside this range increases static current and may degrade switching performance. Input leakage remains ≤±1µA across all valid logic states.

What is the significance of the "EBL" suffix in MAX4731EBL+?

The "EBL" suffix denotes the 9-bump UCSP package variant of the MAX4731, with top mark "ABV". It specifies the exact mechanical form factor (1.52mm × 1.52mm, bottom-side bumps), thermal profile (JEDEC J-STD-020A compliant), and tape-and-reel packaging. This distinguishes it from the µMAX (EUA) and TDFN (ETA) variants, which share identical electrical functionality but differ in size, thermal resistance, and assembly requirements.

Can the MAX4731EBL+ be used in place of the MAX4733EBL+?

No - the MAX4731EBL+ contains two normally open (NO) switches, while the MAX4733EBL+ integrates one NO and one normally closed (NC) switch with break-before-make timing. Substituting MAX4731EBL+ for MAX4733EBL+ would eliminate NC functionality and disable break-before-make behavior, potentially causing signal shorts in applications relying on that topology. They are functionally distinct parts within the same family.