Analog Devices Inc./Maxim Integrated MAX4712CPE

Overview

MAX4712CPE from Maxim Integrated is a fault-protected, quad SPST analog switch with normally open (NO) configuration, designed for signal routing in low-voltage systems. It delivers 25Ω max on-resistance at +25°C, <125ns turn-on time, and ±12V fault protection on NO/NC pins-even with power off-enabling robust operation in battery-powered test equipment and avionics interfaces.

For engineers reviewing the MAX4712CPE datasheet, MAX4712CPE pinout, MAX4712CPE application, or MAX4712CPE equivalent, key selection criteria include its rail-to-rail signal handling under ±2.7V to ±5.5V dual supply or +2.7V to +11V single supply, guaranteed on-resistance match (<1Ω), and fault-clamp behavior during overvoltage transients on analog inputs.

Technical Context

The MAX4712CPE integrates parallel N- and P-channel FETs per channel to achieve low R_ON and flat on-resistance across the signal range. Its dual comparator architecture continuously monitors NO_ pin voltage against V+ and V−, triggering automatic shutdown and output clamping when input exceeds supply rails by ~150mV.

Fault response is asymmetric: during positive faults, P2 clamp FET sources current from V+ to COM_; during negative faults, N2 sinks current to V−. The COM_ pin lacks fault protection and relies on internal ESD diodes-exceeding V+/V− risks damage unless externally limited.

Key Specifications

Pinout & Package

MAX4712CPE uses a 16-pin Plastic DIP package (0.300" wide), through-hole mountable with standard 0.1" pitch. Pin 1 is top-left corner when notch faces up.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX392CPE and ADG1412BRUZ, the MAX4712CPE uniquely combines pin compatibility, sub-25Ω R_ON, and ±12V fault tolerance-making it the only option where signal integrity must coexist with unpredictable input overvoltages.

Availability

MAX4712CPE is available at Aetrix Electronics and suitable for communication systems, battery-operated medical devices, and avionics requiring stable component supply across extended temperature and voltage ranges.

Supply support for MAX4712CPE 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 and mixed-signal ICs for demanding industrial, automotive, and communications applications.

The MAX471x family targets fault-prone analog signal routing-delivering rail-to-rail performance with integrated overvoltage protection to eliminate external clamping components in space-constrained systems.

FAQ

What is the maximum allowable voltage on the NO pins of the MAX4712CPE when V+ = +5V and V− = −5V?

The MAX4712CPE NO pins tolerate up to (V− + 12V) = +7V and (V+ − 12V) = −7V under powered conditions with ±5V supplies. This ±7V fault range is explicitly specified in the Electrical Characteristics table for dual-supply operation and ensures safe operation during transient overvoltages without latch-up or damage. The MAX4712CPE maintains this protection even when powered down.

Can the MAX4712CPE operate from a +3.3V single supply, and what are the implications for on-resistance and switching speed?

Yes, the MAX4712CPE operates from +2.7V to +11V single supply. At +3.3V, typical on-resistance rises to ~54Ω (vs. 25Ω at +5V), and t_ON increases to ~340–500ns. These values are confirmed in the +3V Single Supply Electrical Characteristics section. System designers must verify signal integrity and timing margins at reduced supply voltages using the provided typical curves (toc03, toc04).

Is the COM pin fault-protected on the MAX4712CPE, and what happens if it exceeds the supply rails?

No, the COM pins on the MAX4712CPE are not fault-protected. If a COM pin voltage exceeds V+ or falls below V−, internal ESD diodes conduct, potentially drawing excessive current and damaging the device. The Absolute Maximum Ratings specify COM_ limits as (V− − 0.3V) to (V+ + 0.3V). External clamping or limiting is required for COM-side overvoltage scenarios.

How does the MAX4712CPE behave during a fault condition when the switch is in the ON state?

When a fault occurs (e.g., NO_ exceeds V+ by ~150mV) and the MAX4712CPE switch is ON, the internal N1/P1 FETs turn off, isolating NO_ from COM_, and the clamp FET P2 activates-sourcing current from V+ to COM_ to hold it near V+. This clamps the COM_ output to the same polarity supply, protecting downstream circuitry. The MAX4712CPE sustains ±15mA clamp current per channel under fault.

Does the MAX4712CPE require external pull-up or pull-down resistors on its logic inputs?

No, the MAX4712CPE logic inputs (IN1–IN4) have TTL/CMOS-compatible thresholds and do not require external biasing. VIH is guaranteed ≥2.4V and VIL ≤0.8V for +4.5V to +11V supplies, and the inputs draw only ±1µA leakage (typical). External resistors are unnecessary unless interfacing with open-drain or high-impedance sources outside these voltage windows.