Analog Devices Inc./Maxim Integrated MAX4542EKA+T

Overview

MAX4542EKA+T from Maxim Integrated is a dual normally closed (NC) single-pole/single-throw (SPST) analog switch operating from a single +2.7V to +12V supply. It delivers 60Ω max on-resistance, 2Ω max R_ON matching between channels, and 5pC max charge injection, enabling precision signal routing in battery-powered instrumentation and low-voltage data acquisition systems.

For engineers reviewing the MAX4542EKA+T datasheet, MAX4542EKA+T pinout, MAX4542EKA+T application, or MAX4542EKA+T equivalent, key selection criteria include guaranteed break-before-make timing (not applicable), NC-only switching topology, SOT23-8 package constraints, and leakage performance below 10nA at +85°C.

Technical Context

The MAX4542EKA+T implements two independent NC SPST switches with TTL/CMOS-compatible digital control inputs. Its internal architecture ensures bidirectional analog signal handling across the full V+ to GND range, with on-resistance flatness of ≤6Ω over that range.

It operates without external biasing and supports rail-to-rail logic drive regardless of supply voltage - e.g., IN pins accept 0V to V+ input levels. No internal level-shifting circuitry is used; logic thresholds track supply rails directly.

Key Specifications

Pinout & Package

SOT23-8 package (8-pin, 1.6mm × 2.9mm body, exposed pad not present in this variant). Pin 1 marked by dot; top marking "AAAF".

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX4541EKA+T and ADG702BRMZ-REEL7, the MAX4542EKA+T uniquely provides NC functionality with sub-10nA high-temperature leakage and 5pC charge injection - critical for battery-powered sensor front-ends requiring default-closed, low-error signal paths.

Availability

MAX4542EKA+T is available at Aetrix Electronics and suitable for battery-operated instrumentation, medical sensor signal routing, and industrial process monitoring requiring stable component supply across extended temperature ranges (-40°C to +85°C).

Supply support for MAX4542EKA+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) designs precision analog, mixed-signal, and power management ICs for industrial, medical, and communications applications.

The MAX4541–MAX4544 family targets low-voltage, single-supply analog switching in space-constrained, power-sensitive systems - emphasizing low leakage, low charge injection, and rail-to-rail signal handling.

FAQ

What is the logic polarity of the MAX4542EKA+T control inputs?

The MAX4542EKA+T uses active-low logic: each switch connects its COM pin to its NC pin when the corresponding IN pin is driven LOW (≤0.8V). When IN is HIGH (≥2.4V), the switch opens. This behavior is confirmed in the truth table and functional diagrams for the MAX4542 variant. The MAX4542EKA+T does not invert logic sense - IN1 controls COM1–NC1, and IN2 controls COM2–NC2 independently.

Does the MAX4542EKA+T support break-before-make switching?

No, the MAX4542EKA+T does not support break-before-make switching. That feature is explicitly limited to the MAX4543 and MAX4544 variants per the datasheet's Features section and timing diagrams. The MAX4542EKA+T implements two independent NC SPST switches with no inter-channel timing coordination - both switches operate asynchronously based solely on their respective IN inputs.

What is the maximum analog signal voltage range supported by the MAX4542EKA+T?

The MAX4542EKA+T supports analog signals from GND to V+ across all pins (COM, NC, NO). This is specified as "Analog Signal Range: 0 to V+" in the Electrical Characteristics tables and confirmed in the Applications Information section. For example, with V+ = +5V, signals from 0V to +5V may be switched without degradation in R_ON flatness or increased leakage - verified by the "ON-Resistance vs. COM Voltage" plot (Figure MAX4541-01).

Can the MAX4542EKA+T be used with a +3.3V supply?

Yes, the MAX4542EKA+T is fully specified for +3.3V operation. The Electrical Characteristics table for +3.3V supply shows R_ON = 50Ω max, t_ON = 400ns max, and leakage ≤10nA at +85°C. Logic inputs remain compatible: VINL ≤0.8V and VINH ≥2.4V are valid across the full +2.7V to +12V range, so standard 3.3V CMOS outputs drive the MAX4542EKA+T directly without level shifting.

Is the SOT23-8 package of the MAX4542EKA+T RoHS-compliant and lead-free?

Yes, the MAX4542EKA+T in SOT23-8 packaging is RoHS-compliant and lead-free. This is confirmed by Maxim's official packaging information and ordering table, where the "E" grade (−40°C to +85°C) parts including MAX4542EKA+T are designated as green/lead-free. The "+T" suffix denotes tape-and-reel packaging, consistent with standard RoHS-compliant logistics formats.