Analog Devices Inc./Maxim Integrated MAX14756EUE+T

Overview

MAX14756EUE+T from Maxim Integrated is a quad normally closed (NC) single-pole/single-throw (SPST) analog switch with 10Ω max on-resistance, rail-to-rail ±70V unipolar or ±35V bipolar operation, and -40°C to +85°C temperature range. It enables high-voltage signal routing in industrial control, battery management, and medical instrumentation where fail-safe closed-path behavior is required.

For engineers reviewing the MAX14756EUE+T datasheet, MAX14756EUE+T pinout, MAX14756EUE+T application, or MAX14756EUE+T equivalent, key selection criteria include NC default state, 5Ω typical on-resistance flatness, 2.5nA max off-leakage at +85°C, and TSSOP-16 package compatibility with high-voltage analog switching layouts.

Technical Context

The MAX14756EUE+T implements four independent SPST switches with NC logic: each channel closes when its EN_ input is low (0V), opening only upon high-level enable (≥0.75×VL). Its BiCMOS process supports rail-to-rail analog-signal handling across VSS to VDD while maintaining 0.004Ω typical on-resistance flatness-critical for low-distortion audio and precision instrumentation.

It accepts dual supplies (±35V) or single +70V supply, with internal protection diodes enabling overvoltage/undervoltage clamping. Logic interface uses separate VL supply (1.6V–11V), decoupled from analog rails, allowing mixed-signal system integration without level-shifting circuitry.

Key Specifications

Pinout & Package

MAX14756EUE+T is housed in a RoHS-compliant 16-pin TSSOP package (JEDEC MO-153, 5mm × 4.4mm, 0.65mm pitch) with exposed pad for thermal enhancement. Pin 1 is A1 (Switch 1 Terminal A), and pin numbering follows standard top-view orientation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX14756EUE+T, MAX14757EUE+T provides identical performance with inverted default state-ideal for safety-critical power gating-while ADG1414BRUZ trades HV capability for lower on-resistance in low-voltage precision applications.

Availability

MAX14756EUE+T is available at Aetrix Electronics and suitable for industrial control systems, battery management systems, and medical instrumentation requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for MAX14756EUE+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 high-voltage ICs for industrial, medical, and communications applications.

The MAX14756/MAX14757/MAX14758 family targets high-reliability analog signal routing in harsh environments-specifically engineered for ±35V bipolar or +70V unipolar operation with NC/NO flexibility and integrated protection.

FAQ

What is the default switch state of MAX14756EUE+T during power-up or logic reset?

The MAX14756EUE+T features a normally closed (NC) architecture: all four SPST switches remain closed when EN1–EN4 are low (0V) or floating. This fail-safe behavior ensures uninterrupted signal paths during power sequencing, brownouts, or controller initialization-critical for industrial safety interlocks and medical sensor continuity. The MAX14756EUE+T achieves this via internal biasing that defaults to low-impedance conduction without requiring external pull-downs.

Can MAX14756EUE+T operate with asymmetric bipolar supplies, such as +24V and -12V?

Yes, MAX14756EUE+T supports asymmetric bipolar supplies: VDD and VSS may be offset and need not be symmetrical, as confirmed in the General Description and Absolute Maximum Ratings. For example, applying +24V to VDD and -12V to VSS is valid, provided the voltage difference does not exceed +72V (VDD–VSS ≤ +72V) and neither rail violates its individual rating (VDD ≥ +10V, VSS ≤ -10V). This flexibility simplifies power supply design in mixed-voltage industrial subsystems. The MAX14756EUE+T maintains full rail-to-rail analog range and specified RON across such configurations.

What is the maximum continuous current per switch in MAX14756EUE+T, and what happens if exceeded?

The MAX14756EUE+T specifies ±50mA continuous current per switch (A_/B_ terminals). Exceeding this limit causes increased internal leakage from the switch to VSS but does not damage the device-as long as absolute maximum ratings (e.g., ±72V VDD–VSS, ±100mA peak) are respected. The datasheet explicitly states larger currents do not destroy the device; however, sustained overcurrent degrades RON stability and increases thermal stress. Derating is advised above +70°C ambient, where power dissipation must stay below 889mW (TSSOP θJA = 90°C/W). The MAX14756EUE+T includes no internal current limiting, so external series resistors or fusing are recommended for fault protection.

How does the VL supply pin function in MAX14756EUE+T, and what voltage range is supported?

The VL pin on MAX14756EUE+T powers the enable logic independently from VDD/VSS, supporting 1.6V to +11V. This allows interfacing with 1.8V, 3.3V, or 5V microcontrollers without level shifters. Input thresholds scale with VL: VIL = 0.25×VL and VIH = 0.75×VL, ensuring noise immunity across logic families. VL must be bypassed with a 1µF ceramic capacitor to GND. Unlike VDD/VSS, VL has no high-voltage rating-exceeding +12V or going below -0.3V relative to GND risks damage. The MAX14756EUE+T's separation of analog and logic supplies prevents digital switching noise from modulating analog performance.

Is MAX14756EUE+T pin-compatible with industry-standard quad SPST switches like DG411?

MAX14756EUE+T is functionally compatible with DG411, DG412, and DG413 per the datasheet Features section, sharing identical 16-pin TSSOP footprint, pin assignments (A1–A4, B1–B4, EN1–EN4, VDD, VSS, GND, VL), and basic timing. However, it is not a direct pin-for-pin replacement for DG411 due to differences in supply voltage range (+70V vs. ±20V), on-resistance (10Ω max vs. 35Ω max), and logic interface (separate VL vs. VDD-referenced). Board reuse is possible with voltage scaling and layout verification, but MAX14756EUE+T requires updated bypassing and clamping for HV operation. No PCB changes are needed solely for footprint alignment.