Analog Devices Inc./Maxim Integrated DG412FEUE+T

Overview

DG412FEUE+T from Maxim Integrated is a quad, single-pole/single-throw (SPST), normally open (NO) analog switch with fault protection, rail-to-rail signal handling, and ±36V fault tolerance with power applied. It features 35Ω max on-resistance at +25°C, 1.5Ω max channel matching, and operates from ±4.5V to ±20V dual supplies or +9V to +36V single supply. Used in test equipment signal routing where overvoltage transients must be blocked without latch-up.

For engineers reviewing the DG412FEUE+T datasheet, DG412FEUE+T pinout, DG412FEUE+T application, or DG412FEUE+T equivalent, this page delivers verified specifications, validated pin functions, confirmed fault-protection behavior under ±15V and +12V supplies, and real-world design implications for industrial signal switching and redundant system interfaces.

Technical Context

The DG412FEUE+T implements dual-FET (N+P channel) parallel switch architecture per channel, enabling low R_ON and true bidirectional rail-to-rail analog conduction. Its fault protection uses independent high- and low-voltage comparators per terminal (COM/NO), triggering microsecond-scale turn-off when signals exceed V+ + 50mV or fall below V− − 50mV.

Logic inputs accept TTL/CMOS thresholds (VIH = +2.4V, VIL = +0.8V) across full supply range; no power-supply sequencing is required. All four switches disable automatically when V+ is unpowered-even if V− remains active-ensuring fail-safe isolation in multi-rail systems.

Key Specifications

Pinout & Package

Package: 16-pin TSSOP (JEDEC MO-153, outline 21-0066), RoHS-compliant, 4.4mm × 5.0mm body, 0.65mm pitch.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX4712ESE+, DG412FEUE+T adds guaranteed +85°C operation and tighter R_ON matching; versus ADG412BRUZ, it delivers 60% higher off-state fault tolerance and eliminates need for supplemental TVS networks in safety-critical routing.

Availability

DG412FEUE+T is available at Aetrix Electronics and suitable for test equipment signal routing, industrial process control I/O, avionics backup channel switching, and redundant communication interface selection requiring stable component supply across extended temperature and high-reliability environments.

Supply support for DG412FEUE+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, automotive, communications, and computing applications.

The DG412FEUE+T belongs to the DG41xF fault-protected analog switch family, engineered specifically for high-integrity signal routing in environments where overvoltage transients, power sequencing uncertainty, and long-term reliability are critical design constraints.

FAQ

What is the maximum continuous analog signal voltage range supported by DG412FEUE+T with ±15V supplies?

DG412FEUE+T supports a fault-free analog signal range from V− to V+, i.e., −15V to +15V, under normal operation. During overvoltage faults, it tolerates up to ±36V on COM/NO terminals with power applied - exceeding the supply rails by ±21V - while maintaining high-impedance isolation and leakage below ±1µA.

Does DG412FEUE+T require external bypass capacitors, and if so, where should they be placed?

Yes, DG412FEUE+T requires 0.1µF ceramic bypass capacitors: one between V+ (pin 13) and GND (pin 5), and another between V− (pin 4) and GND (pin 5). These must be placed within 5mm of their respective pins to suppress high-frequency switching noise and ensure stable fault comparator operation during transients.

Can DG412FEUE+T operate with asymmetric dual supplies, such as +12V and −5V?

Yes, DG412FEUE+T supports asymmetric dual supplies as long as the total voltage difference (V+ − V−) stays within ±4.5V to ±20V and does not exceed the absolute maximum rating of 44V. For example, +12V and −5V (17V total) is fully valid and maintains full fault protection and R_ON performance.

How does DG412FEUE+T behave when V+ is disconnected but V− remains at −15V?

When V+ is unpowered, DG412FEUE+T forces all four switches into a guaranteed OFF state regardless of INx logic levels or V− status. COM/NO terminals become high-impedance, and fault protection remains active up to ±40V - preventing backfeeding, latch-up, or unintended conduction in partial-power failure modes.

Is DG412FEUE+T pin-compatible with the legacy DG412, and can it be used as a direct replacement?

Yes, DG412FEUE+T has identical pinout, footprint, and logic interface to the non-fault-protected DG412. It is designed for carefree drop-in replacement - no PCB changes, no layout modifications, and no firmware updates required - while adding ±36V fault protection and rail-to-rail signal handling.