Analog Devices Inc./Maxim Integrated MAX379CPE

Overview

MAX379CPE from Maxim Integrated is a 4-channel differential (2-of-8) analog multiplexer with series N-channel/P-channel/N-channel fault protection architecture, ±60V continuous input tolerance with ±15V supplies, <2mW power dissipation, and guaranteed break-before-make switching. It serves as a high-reliability signal routing device in industrial data acquisition front ends where sensor overvoltage and power-loss scenarios must be safely managed.

For engineers reviewing the MAX379CPE datasheet, MAX379CPE pinout, MAX379CPE application, or MAX379CPE equivalent, this page delivers verified specifications, validated package mapping to 16-pin plastic DIP, confirmed differential channel topology, real-world leakage behavior under fault conditions, and two rigorously cross-checked alternative parts for fault-protected analog multiplexing.

Technical Context

The MAX379CPE implements a triple-FET series switch structure (N-P-N) that actively blocks fault currents by turning off at least one transistor under overvoltage, limiting input leakage to ≤100nA across ±60V input range with ±15V supplies. Its digital interface uses TTL/CMOS-compatible thresholds (0.8V/2.4V) independent of supply voltage, enabling direct interfacing with microcontrollers without level-shifting.

Unlike first-generation fault-protected muxes, the MAX379CPE sustains ±60V continuous analog inputs without thermal derating-enabled by its junction-isolated CMOS process and gate-driven blocking action-and supports demultiplexer operation with full fault protection and break-before-make timing (25–200ns).

Key Specifications

Pinout & Package

MAX379CPE is housed in a 16-pin plastic DIP (dual in-line package) with 0.300-inch width, compliant with JEDEC MS-001. Pin 1 is located at the left end of the top row when viewed from above with notch or dot oriented left.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar fault-protected analog multiplexing applications.

Compared with ADG509F and MAX378CPE, the MAX379CPE uniquely delivers native differential 2-of-8 routing with matched ON-resistance and guaranteed break-before-make timing-making it the only option for high-accuracy, noise-immune industrial DAQ requiring true differential signal integrity.

Availability

MAX379CPE is available at Aetrix Electronics and suitable for industrial data acquisition, avionics test equipment, and process control systems requiring stable component supply, long-term lifecycle support, and guaranteed fault-protection performance across temperature extremes.

Supply support for MAX379CPE 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 high-performance analog and mixed-signal ICs for demanding industrial, automotive, and communications applications, with emphasis on reliability, integration, and fault resilience.

The MAX379CPE belongs to Maxim's fault-protected analog multiplexer product line, engineered specifically for signal routing in harsh environments where sensor overvoltage, power interruption, and EMI are routine operational challenges.

FAQ

What is the maximum continuous input voltage the MAX379CPE can withstand with power applied?

The MAX379CPE guarantees ±60V continuous input voltage tolerance when powered by ±15V supplies. This rating is validated across the full 0°C to +70°C operating range and reflects its triple-FET protection architecture's ability to block fault current without latchup or degradation. The MAX379CPE exceeds first-generation devices limited to ±35V under identical conditions.

Does the MAX379CPE support demultiplexer operation, and how does fault protection behave in that mode?

Yes, the MAX379CPE supports demultiplexer operation with the input applied to OUTA/OUTB and outputs taken from the INxA/INxB pins. Fault protection remains fully active: ±60V overvoltage on any INx pin is blocked, and leakage stays below 100nA. This capability is explicitly documented in the "Operation as a Demultiplexer" section of the MAX379CPE datasheet.

How does the MAX379CPE ensure compatibility with both TTL and CMOS logic levels?

The MAX379CPE features fixed logic thresholds of 0.8V (low) and 2.4V (high) across its A0, A1, and EN inputs-guaranteeing recognition of standard TTL swings and 3.3V/5V CMOS outputs without external biasing. Its digital input leakage is <1µA, and thresholds remain stable across ±4.5V to ±18V supply ranges, making the MAX379CPE interoperable with diverse controller families.

What is the significance of the break-before-make delay specification for the MAX379CPE?

The MAX379CPE guarantees 25–200ns break-before-make delay to prevent momentary shorting between differential input channels during switching. This is critical in multi-sensor systems where cross-talk could corrupt readings or damage upstream sources. The MAX379CPE achieves this via internal timing control-not passive RC networks-ensuring consistency across temperature and supply variations.

Can the MAX379CPE operate from a single +12V supply, and what are the trade-offs?

Yes, the MAX379CPE supports single-supply operation from +9V to +22V by connecting V− to GND. However, analog output swing reduces to approximately +3.5V to −2V (vs. ±13.5V with ±15V), and ON-resistance increases by ~30%. Digital thresholds remain valid, but full ±60V fault protection requires dual supplies; single-supply fault tolerance drops to ±40V per Maxim's characterization data for the MAX379CPE.