Analog Devices Inc./Maxim Integrated MAX307EQI+T

Overview

MAX307EQI+T from Maxim Integrated is a precision, differential 2-of-8 CMOS analog multiplexer designed for high-fidelity signal routing in demanding analog systems. It features <100Ω on-resistance (max), <5Ω channel-to-channel matching, <10pC charge injection, ±4.5V to ±20V bipolar or +5V to +30V single-supply operation, and operates across –40°C to +85°C in a 28-pin PLCC package-ideal for military radios and guidance systems requiring rail-to-rail signal handling and low leakage.

For engineers reviewing the MAX307EQI+T datasheet, MAX307EQI+T pinout, MAX307EQI+T application, or MAX307EQI+T equivalent, key selection criteria include guaranteed on-resistance flatness (≤7Ω), sub-2.5nA NO off-leakage at +85°C, ESD protection >2000V, TTL/CMOS-compatible control inputs, and plug-in upgrade compatibility with DG407/DG507A.

Technical Context

The MAX307EQI+T implements a dual 8-channel differential architecture with independent COMA and COMB outputs, enabling simultaneous switching of two matched signal paths. Its silicon-gate CMOS process delivers ultra-low charge injection (<10pC) and tightly controlled on-resistance matching (<5Ω) over temperature and signal range.

It supports flexible supply configurations-including unbalanced rails like +24V/–5V-and maintains TTL/CMOS logic compatibility while achieving fast transition times (<250ns) and break-before-make timing (<40ns). All digital inputs are internally clamped, and absolute maximum ratings ensure robustness against overvoltage transients.

Key Specifications

Pinout & Package

MAX307EQI+T is housed in a 28-pin Plastic Leaded Chip Carrier (PLCC) package with J-lead configuration, RoHS-compliant, and rated for –40°C to +85°C operation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX307EWI, MAX307EQI+T offers superior thermal dissipation margin in high-temperature environments and mechanical robustness for vibration-prone deployments; versus ADG507AKRZ, it delivers tighter matching, lower leakage, and broader supply flexibility-justifying its use in mission-critical signal routing.

Availability

MAX307EQI+T is available at Aetrix Electronics and suitable for military radios, guidance and control systems, test equipment, battery-operated instrumentation, and heads-up displays requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MAX307EQI+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, automotive, communications, and computing markets.

The MAX306/MAX307 family was engineered for precision analog signal routing in harsh environments-delivering guaranteed matching, ultra-low leakage, and robust ESD tolerance for defense, aerospace, and test & measurement applications.

FAQ

What is the maximum analog signal range supported by the MAX307EQI+T?

The MAX307EQI+T supports an analog signal range of ±15V when operated with dual supplies (±4.5V to ±20V), and 0V to +12V with a +12V single supply. This rail-to-rail capability ensures full utilization of input dynamic range without clipping, making MAX307EQI+T suitable for high-fidelity sensor interfaces and precision instrumentation where signal integrity is critical.

Does the MAX307EQI+T require external pull-up resistors on its address or enable pins?

No, the MAX307EQI+T features CMOS-compatible digital inputs with guaranteed TTL thresholds (VAL ≤ 0.8V, VAH ≥ 2.4V) and input currents under ±1.0µA-eliminating the need for external pull-ups. The MAX307EQI+T can be driven directly from standard microcontroller GPIOs or FPGA outputs without additional passive components, simplifying design and reducing BOM count.

Can the MAX307EQI+T operate with unbalanced supply voltages such as +24V and –5V?

Yes, the MAX307EQI+T supports unbalanced supplies up to a total differential of +44V (V+ – V– ≤ +44V). Operation at +24V/–5V is explicitly validated in the datasheet and maintains full specification compliance-including on-resistance, leakage, and switching speed-making MAX307EQI+T adaptable to nonstandard power architectures in industrial and military platforms.

How does the MAX307EQI+T compare to the MAX306EQI+T in terms of channel configuration and use cases?

The MAX307EQI+T is a differential 2-of-8 multiplexer with separate COMA and COMB outputs, enabling concurrent routing of two independent differential signal paths. In contrast, the MAX306EQI+T is a single-ended 1-of-16 device with one common output (COM). MAX307EQI+T is preferred for balanced signal chains (e.g., I/Q demodulation), while MAX306EQI+T suits high-channel-count single-ended applications like data acquisition scanning.

Is the MAX307EQI+T pin-compatible with industry-standard alternatives like the DG407 or DG507A?

Yes, the MAX307EQI+T is a documented plug-in upgrade for the DG407 and DG507A, sharing identical pinout, function mapping, and logic-level compatibility. No PCB changes are required when replacing those legacy parts with MAX307EQI+T-delivering improved on-resistance matching (<5Ω vs. unspecified), lower leakage, and enhanced ESD protection (>2000V vs. ~200V) without layout modification.