Analog Devices Inc./Maxim Integrated MAX307EUI+

Overview

The MAX307EUI+ from Maxim Integrated is a precision, differential 2-of-8 CMOS analog multiplexer designed for high-fidelity signal routing in demanding measurement and control systems. It delivers <100Ω on-resistance (max), <5Ω channel-to-channel matching, <10pC charge injection, <2.5nA NO off-leakage at +85°C, and operates from ±4.5V to ±20V or +5V to +30V supplies - enabling rail-to-rail analog signal handling in test equipment and military radios.

For engineers reviewing the MAX307EUI+ datasheet, MAX307EUI+ pinout, MAX307EUI+ application, or MAX307EUI+ equivalent, key selection criteria include guaranteed on-resistance flatness (≤7Ω), ESD protection >2000V, TTL/CMOS-compatible logic inputs, low power consumption (<1.25mW), and plug-in upgrade compatibility with DG407/DG507A.

Technical Context

The MAX307EUI+ implements a fully decoded 3-bit address interface (A0–A2) with enable (EN) control to select one of eight differential pairs (NO1A/NO1B through NO8A/NO8B), routing bidirectional analog signals between COMA/COMB outputs and corresponding input channels. Its silicon-gate CMOS process ensures matched switch characteristics across all channels.

It supports both bipolar (±4.5V to ±20V) and single-supply (+5V to +30V) operation, with rail-to-rail analog signal range up to ±15V (dual) or 0–12V (single). Input logic thresholds are fixed at VAL ≤ 0.8V and VAH ≥ 2.4V, ensuring robust interfacing with standard digital controllers without level-shifting.

Key Specifications

Pinout & Package

MAX307EUI+ is housed in a 28-pin TSSOP (Thin Shrink Small Outline Package) with 0.65mm pitch, optimized for space-constrained PCB layouts while maintaining thermal and electrical performance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX307EUI+, MAX307EWI+ offers identical performance in a larger, more manufacturable package, while ADG507AKRZ trades precision specifications for broader vendor availability - making MAX307EUI+ optimal for high-fidelity, space-constrained, temperature-stable designs.

Availability

MAX307EUI+ is available at Aetrix Electronics and suitable for test equipment, military radios, sample-and-hold circuits, and battery-operated systems requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for MAX307EUI+ 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 markets.

The MAX306/MAX307 product line was engineered for precision analog signal routing in mission-critical instrumentation and defense systems, emphasizing low distortion, thermal stability, and ruggedized operation across extended temperature ranges.

FAQ

What is the maximum allowable supply voltage difference for MAX307EUI+?

The MAX307EUI+ specifies an absolute maximum V+ to V− differential of +44V. Exceeding this risks permanent damage, regardless of individual rail voltages. For example, applying +24V to V+ and −25V to V− yields a 49V difference and violates the absolute maximum rating. Always verify the net supply differential stays within 44V, even when using unbalanced rails like +24V/−5V.

Does MAX307EUI+ support single-supply operation with V− tied to GND?

Yes, MAX307EUI+ supports single-supply operation: tie V− to GND and apply +5V to +30V to V+. In this configuration, the analog signal range becomes 0V to V+ − 2V (e.g., 0–12V with +15V supply), and logic inputs retain TTL/CMOS compatibility. The device maintains full functionality, including enable control and address decoding, with no external modifications required.

What is the guaranteed on-resistance flatness specification for MAX307EUI+?

MAX307EUI+ guarantees on-resistance flatness of ≤7Ω maximum at +25°C, defined as the difference between the highest and lowest RON values measured across the full specified analog signal range (±10V for dual supply). This tight flatness ensures minimal gain variation and harmonic distortion when routing AC signals, especially critical in audio and precision measurement applications.

Can MAX307EUI+ be used as a direct replacement for DG407 in existing designs?

Yes, MAX307EUI+ is explicitly designed as a plug-in upgrade for DG407 and DG507A. It shares identical pinout, logic thresholds, timing behavior, and functional truth table. No PCB changes or firmware updates are needed - simply substitute MAX307EUI+ to gain improved on-resistance matching (<5Ω vs. unspecified for DG407), lower charge injection (<10pC vs. ~25pC), and enhanced ESD protection (>2000V vs. ~200V).

What is the maximum operating temperature range for MAX307EUI+?

MAX307EUI+ is rated for operation from −40°C to +85°C, as indicated by the "E" grade suffix in its part number. This extended industrial temperature range ensures reliable performance in automotive under-hood modules, outdoor communications equipment, and factory-floor instrumentation where ambient temperatures exceed commercial-grade limits.