Analog Devices Inc./Maxim Integrated MAX355CPE

Overview

MAX355CPE from Maxim Integrated is a dual 4-channel fault-protected analog multiplexer designed for high-reliability signal routing in industrial and avionics systems. It operates from ±4.5V to ±18V supplies, delivers ≤350Ω on-resistance, <0.5nA input leakage at +25°C, and guarantees break-before-make switching. It protects against ±40V overvoltage with power off and clamps outputs to within 1.5V of supply rails during faults.

For engineers reviewing the MAX355CPE datasheet, MAX355CPE pinout, MAX355CPE application, or MAX355CPE equivalent, this page provides verified technical context, real-world design meaning for key specs, validated pin functions, and two confirmed alternative parts for fault-tolerant analog switching in data-acquisition and redundant control systems.

Technical Context

The MAX355CPE implements a series N-P-N MOSFET structure that actively limits fault current to sub-microamp levels when analog inputs exceed ±13.5V (with ±15V supplies), while maintaining correct output polarity and no glitches. Its digital interface uses fixed 0.8V/2.4V logic thresholds referenced to GND, ensuring TTL/CMOS compatibility without pull-ups across its full temperature range.

Each 4-channel section (COMA/NO1A–NO4A and COMB/NO1B–NO4B) operates independently with identical on-resistance matching (≤15Ω), charge injection (≤180pC at ±15V), and settling time (≤2.5µs to 0.01%). Fault protection remains active whether supplies are on or off-no power-up sequencing is required.

Key Specifications

Pinout & Package

MAX355CPE is supplied in a 16-pin plastic DIP package (0.300" width), with through-hole mounting and industry-standard footprint compatible with legacy PCB layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADG509F, MAX355CPE provides superior intrinsic fault resilience without added BOM cost; compared with MAX355EPE, it offers identical performance at lower unit price for applications staying within 0°C to +70°C ambient.

Availability

MAX355CPE is available at Aetrix Electronics and suitable for industrial data acquisition, avionics signal routing, and ATE equipment requiring stable component supply with guaranteed long-term sourcing.

Supply support for MAX355CPE 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 demanding industrial, automotive, and communications applications.

The MAX354/MAX355 product line was engineered specifically for fault-tolerant analog signal routing in harsh environments where overvoltage events, hot-swap operation, and system-level reliability are non-negotiable requirements.

FAQ

What is the maximum overvoltage the MAX355CPE can withstand with power supplies disconnected?

The MAX355CPE withstands continuous ±40V overvoltage on any analog input or output pin-even when V+ and V− are unpowered. This is achieved via its internal series N-P-N FET structure, which blocks current flow by turning off either the N-channel or P-channel device depending on fault polarity. No external protection components are needed for this condition, making MAX355CPE ideal for field-wire interfaces where accidental contact with higher-voltage systems may occur.

Does the MAX355CPE support demultiplexer operation, and how does fault protection behave in that mode?

Yes, the MAX355CPE supports full demultiplexer operation: apply the analog signal to COMA or COMB and route it to any selected NOxA or NOxB pin. Fault protection remains fully active-overvoltage on an NOx pin is clamped and blocked identically to multiplexer mode. The series FET structure ensures no polarity reversal or glitch occurs during fault entry or recovery, preserving signal integrity in bidirectional test equipment and redundant sensor architectures.

How does the on-resistance of the MAX355CPE vary with analog signal voltage and temperature?

MAX355CPE on-resistance is typically 285Ω at ±10V and +25°C, rising to ≤350Ω across the full ±10V analog range and 0°C to +70°C temperature span. At extremes-e.g., VCOM = ±13.5V-the on-resistance increases sharply as the internal N- or P-channel FET begins to turn off, limiting fault current. This behavior is documented in Figure 1b and Table 1 of the MAX355CPE datasheet and is integral to its fault-protection mechanism.

Can the MAX355CPE operate from a single +24V supply, and what modifications are needed?

Yes, MAX355CPE operates from a single +4.5V to +36V supply. To use +24V, connect V− to GND, tie EN, A0, and A1 to appropriate logic levels (0V or +24V), and ensure analog signals remain within the resulting output swing: approximately +22.5V to −1.5V. Digital thresholds remain valid (0.8V/2.4V relative to GND), and on-resistance increases slightly versus ±15V operation-but stays within the 350Ω max spec. No external level shifters are required.

Is the MAX355CPE pin-compatible with the ADG509F, and what are the key functional trade-offs?

Yes, MAX355CPE is pin-compatible with ADG509F in the 16-pin DIP package, sharing identical pin assignments for COMA, COMB, NO1A–NO4A, NO1B–NO4B, A0, A1, EN, V+, V−, and GND. However, ADG509F lacks the ±40V fault-with-power-off capability and clamping behavior of MAX355CPE. Its fault rating is limited to ±20V only when powered, making it unsuitable for applications requiring intrinsic resilience to wiring errors or hot-swap events without supplemental protection.