Analog Devices Inc./Maxim Integrated MAX312CUE+

Overview

MAX312CUE+ from Maxim Integrated is a quad, single-pole/single-throw (SPST), normally closed (NC) CMOS analog switch optimized for precision signal routing in bipolar and single-supply systems. It delivers 6.5Ω typical on-resistance, 1.5Ω max on-resistance matching between channels, and rail-to-rail signal handling from ±4.5V to ±20V dual supplies or +4.5V to +30V single supply - enabling low-distortion audio routing and high-fidelity data acquisition.

For engineers reviewing the MAX312CUE+ datasheet, MAX312CUE+ pinout, MAX312CUE+ application, or MAX312CUE+ equivalent, key selection criteria include guaranteed R_ON flatness (≤2Ω), <2.5nA off-leakage at +85°C, >96dB crosstalk at 20kHz, ESD tolerance >2000V per Method 3015.7, and TSSOP-16 packaging for space-constrained PCB layouts.

Technical Context

The MAX312CUE+ implements a fully complementary CMOS transmission-gate architecture with matched P- and N-channel devices per channel, ensuring symmetrical conduction and minimal charge injection (±30pC). Its logic interface accepts TTL/CMOS-compatible inputs referenced to VL (2.4V high, 0.8V low) independent of analog supply rails.

It supports true rail-to-rail analog signal switching across the full V+ to V− range, with guaranteed R_ON flatness ≤2Ω over ±10V signal swing and leakage currents tested at temperature extremes - critical for sample-and-hold circuits and multiplexed sensor interfaces where signal integrity must be preserved across voltage and thermal boundaries.

Key Specifications

Pinout & Package

MAX312CUE+ is housed in a 16-pin TSSOP package (4.4mm width), pin-compatible with industry-standard DG411/DG412/DG413 switches and suitable for automated SMT assembly. The package features exposed pad for thermal enhancement and meets JEDEC MO-153 standards.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX313CUE+, the MAX312CUE+ provides fail-safe closed-path behavior under logic fault conditions, while ADG411BRUZ trades lower on-resistance for broader temperature coverage - making MAX312CUE+ optimal for precision, room-temperature audio and test signal routing where NC default state is functionally required.

Availability

MAX312CUE+ is available at Aetrix Electronics and suitable for audio signal routing, test equipment multiplexing, and data acquisition systems requiring stable component supply, long-term lifecycle support, and traceable sourcing for production programs.

Supply support for MAX312CUE+ 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 U.S.-based semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, communications, and consumer applications.

The MAX312/MAX313/MAX314 family was designed specifically for low-distortion, precision analog signal routing in test, measurement, and audio systems - emphasizing matched R_ON, low leakage, and rail-to-rail operation across wide supply ranges.

FAQ

What is the maximum operating temperature range for the MAX312CUE+?

The MAX312CUE+ is rated for operation from 0°C to +70°C. This commercial-grade temperature range is specified in the Ordering Information table and confirmed by absolute maximum ratings and electrical characteristics testing across that interval. The "C" suffix in MAX312CUE+ explicitly denotes the 0°C to +70°C grade, distinguishing it from the "E" (−40°C to +85°C) and "M" (−55°C to +125°C) variants. Thermal derating for the TSSOP package begins above +70°C at 6.7mW/°C.

Does the MAX312CUE+ support single-supply operation?

Yes, the MAX312CUE+ supports single-supply operation from +4.5V to +30V, with V− connected to GND. Electrical Characteristics tables explicitly list performance under single-supply conditions (e.g., V+ = 12V, V− = 0V), including R_ON = 12.5Ω typical and t_ON = 425ns. The device maintains rail-to-rail signal handling from 0V to V+, enabling compatibility with microcontroller-based systems using 5V or 12V rails without negative supply generation.

How does the MAX312CUE+ differ from the MAX313CUE+ in functionality?

The MAX312CUE+ is a normally closed (NC) switch: each channel conducts when its IN pin is logic low (0V), and opens when IN is logic high (≥2.4V). In contrast, the MAX313CUE+ is normally open (NO): conduction occurs only when IN is high. Both share identical pinouts, packages, R_ON, leakage, and timing specs. The functional difference is purely logical state mapping - critical for fail-safe design where default continuity (MAX312CUE+) or default isolation (MAX313CUE+) is required.

Is the MAX312CUE+ pin-compatible with the DG411 analog switch?

Yes, the MAX312CUE+ is explicitly stated in the Features section as "Pin Compatible with DG411/DG412/DG413". Pin mapping, package outline (TSSOP-16), and logic polarity match the DG411, allowing direct substitution in existing layouts. However, the MAX312CUE+ offers lower R_ON (6.5Ω vs. ~35Ω for DG411), better R_ON matching (1.5Ω vs. unspecified), and enhanced ESD protection (>2000V vs. unspecified), delivering measurable performance improvements without PCB revision.

What is the significance of the "Rail-to-Rail®" specification for the MAX312CUE+?

Rail-to-Rail® operation means the MAX312CUE+ can pass analog signals from V− to V+ without clipping or distortion - e.g., ±10V signals with ±15V supplies, or 0V to 12V signals with +12V/0V supplies. This is achieved via full CMOS transmission gates and verified by the Analog Signal Range parameter (V_COM, V_NO/V_NC = V− to V+). It eliminates the need for level-shifting in multi-supply systems and ensures full dynamic range utilization in precision applications like data acquisition and audio routing.