Analog Devices Inc./Maxim Integrated MAX4512CPE

Overview

The MAX4512CPE from Maxim Integrated is a quad, single-pole/single-throw (SPST), normally open (NO), fault-protected analog switch IC. It operates with ±4.5V to ±18V dual supplies or +9V to +36V single supply, delivers rail-to-rail signal handling, features 175Ω max on-resistance at ±15V, and provides ±36V fault protection on NO/NC terminals during power-up/down. It is used in industrial data acquisition systems requiring robust signal path integrity under overvoltage transients.

For engineers reviewing the MAX4512CPE datasheet, MAX4512CPE pinout, MAX4512CPE application, or MAX4512CPE equivalent, key selection criteria include its fault-protected NO configuration, 16-pin plastic DIP package, ±36V fault tolerance with powered supplies, rail-to-rail analog switching capability, and compatibility with TTL/CMOS logic inputs across supply ranges.

Technical Context

The MAX4512CPE employs parallel N- and P-channel FETs per switch to achieve low on-resistance and true rail-to-rail conduction. Its internal fault-protection circuitry uses dual comparators monitoring NO/NC pins against V+ and V−; when voltage exceeds rails by ~50mV, it disables the main FETs and activates booster FETs to clamp COM output to the appropriate supply rail while sourcing/sinking up to 10mA.

Unlike traditional triple-FET fault-protected switches, the MAX4512CPE maintains consistent on-resistance across the full signal range and exhibits no transition glitches during fault onset or recovery. It requires no power-supply sequencing, supports bidirectional signal flow, and retains ±40V fault protection even with V+ = V− = 0V (power-off condition).

Key Specifications

Pinout & Package

MAX4512CPE is housed in a 16-pin plastic DIP (dual in-line package) with 0.300" wide body and 0.100" lead pitch. Pin 1 is located at the left end of the top row when viewed from the top with the notch or dot oriented upward.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX4512CSE, the MAX4512CPE offers identical functionality in a through-hole package ideal for manual assembly and mechanical stability; versus ADG412BNZ, it provides essential fault resilience at the cost of slightly higher RON - making it indispensable in industrial and aerospace signal routing where reliability outweighs marginal performance gain.

Availability

MAX4512CPE is available at Aetrix Electronics and suitable for industrial data acquisition, avionics signal routing, and ATE equipment requiring stable component supply and long-term obsolescence management.

Supply support for MAX4512CPE 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 semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for demanding industrial, automotive, and communications applications.

The MAX4511/MAX4512/MAX4513 family was designed specifically for fault-tolerant analog signal routing in harsh environments - addressing the need for robust, rail-to-rail switching without external protection circuitry.

FAQ

What is the maximum fault voltage the MAX4512CPE can withstand on its NO pins?

The MAX4512CPE withstands ±36V on NO pins with power applied (V+ and V− active) and ±40V with power removed (V+ = V− = 0V). This is specified in the Absolute Maximum Ratings table and confirmed in the Fault Protection section of the datasheet. Exceeding these limits risks permanent damage, and the protection applies only to NO/NC pins - COM and IN pins are not fault protected.

Is the MAX4512CPE pin-compatible with the DG412?

Yes, the MAX4512CPE is explicitly stated as pin-compatible with the DG412, DG202, and other industry-standard non-fault-protected analog switches. Its pinout matches exactly: IN1–IN4, COM1–COM4, and NO1–NO4 occupy identical positions in the 16-pin DIP package. However, only the NO pins inherit fault protection - COM and IN pins retain standard CMOS characteristics and require adherence to V+ and V− limits.

Can the MAX4512CPE operate from a single +12V supply?

Yes, the MAX4512CPE supports single-supply operation from +9V to +36V. For +12V use, connect V− to GND, apply +12V to V+, and ensure all analog signals on NO/COM remain within 0V to +12V for fault-free operation. The datasheet confirms 175Ω max RON and 0.5nA off-leakage under +12V conditions, with logic thresholds remaining TTL/CMOS-compatible.

What happens to the COM output during a positive overvoltage fault on an NO pin?

During a positive fault (>V+ + ~50mV) on an NO pin, the MAX4512CPE disables the main N/P-FET pair and turns on the P2 "booster" FET, sourcing current from V+ to the COM pin. This clamps the COM output precisely to V+, delivering up to 10mA to the load - ensuring a defined, rail-aligned output without glitching or floating states, as verified in the Detailed Description and Functional Diagram sections.

Does the MAX4512CPE require power-supply sequencing?

No, the MAX4512CPE does not require power-supply sequencing. Its internal logic-level translators and fault comparators function correctly regardless of whether V+ or V− is applied first, and the device remains in a known safe state (all switches off) during power transitions. This is explicitly cited as a feature in the datasheet's Applications and Features sections and validated in the Absolute Maximum Ratings notes.