Analog Devices Inc./Maxim Integrated MAX4518CPD

Overview

MAX4518CPD from Maxim Integrated is a precision 4-channel CMOS analog multiplexer with ≤100Ω on-resistance, <4Ω channel-to-channel matching, <5pC charge injection, rail-to-rail signal handling, and dual-supply operation (±2.7V to ±8V) or single-supply operation (+2.7V to +15V). It serves as a low-leakage, low-distortion signal routing switch in battery-operated data-acquisition systems.

For engineers reviewing the MAX4518CPD datasheet, MAX4518CPD pinout, MAX4518CPD application, or MAX4518CPD equivalent, key selection criteria include guaranteed on-resistance flatness (<10Ω), NO-off leakage <2nA at +85°C, break-before-make timing (200ns typ), TTL/CMOS logic compatibility, and 14-pin plastic DIP package suitability for prototyping and industrial control interfaces.

Technical Context

The MAX4518CPD implements a monolithic CMOS analog switch architecture with silicon-gate process optimization for ultra-low charge injection (<5pC) and ESD robustness (>2000V). Its enable-controlled 4:1 multiplexing uses two address bits (A0, A1) and an active-high EN input to select one of four normally-open analog paths to a common COM terminal.

It supports both unipolar and bipolar analog signal ranges - up to ±4.5V with dual supplies or 0V to V+ with single supply - while maintaining sub-100Ω R_ON, <10Ω R_ON flatness over full signal swing, and <250ns transition time. Logic inputs are compatible with TTL and CMOS voltage thresholds (V_IL ≤ 0.8V, V_IH ≥ 2.4V).

Key Specifications

Pinout & Package

MAX4518CPD is housed in a 14-pin plastic DIP package (0.300" wide), rated for 0°C to +70°C operation. Pin assignments follow standard DIP layout with GND referenced to pin 13, V+ on pin 12, V− on pin 5, and COM on pin 8.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADG408BRZ and TS5A23157DCUR, the MAX4518CPD uniquely delivers guaranteed <4Ω R_ON matching, <5pC charge injection, and <2nA leakage at +85°C in a through-hole 14-pin DIP - making it the only option qualified for calibrated, high-reliability, wide-temperature analog multiplexing where parameter consistency is non-negotiable.

Availability

MAX4518CPD is available at Aetrix Electronics and suitable for automatic test equipment, battery-operated instrumentation, and heads-up display subsystems requiring stable component supply across long production lifecycles.

Supply support for MAX4518CPD 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 industrial, medical, and communications applications.

The MAX4518CPD belongs to Maxim's precision analog multiplexer product line, engineered specifically for low-distortion, low-leakage signal routing in high-fidelity data-acquisition and test systems where parameter guarantees - not just typical values - are mandatory.

FAQ

What is the maximum analog signal range supported by the MAX4518CPD?

The MAX4518CPD supports rail-to-rail analog signals: ±4.5V with dual supplies (±2.7V to ±8V) or 0V to V+ with single supply (+2.7V to +15V). At ±5V supplies, the guaranteed range is ±4.5V; at +5V single supply, it extends from 0V to +5V. This range is validated across the full operating temperature range and ensures minimal distortion in precision signal paths.

Does the MAX4518CPD require external pull-up or pull-down resistors on its logic inputs?

No, the MAX4518CPD does not require external pull-up or pull-down resistors on A0, A1, or EN. Its CMOS inputs have guaranteed logic thresholds (V_IL ≤ 0.8V, V_IH ≥ 2.4V) and low input current (<0.1µA), allowing direct interface with standard microcontroller GPIOs or FPGA outputs without additional biasing components.

Can the MAX4518CPD operate with unbalanced supplies, such as +10V and −5V?

Yes, the MAX4518CPD supports unbalanced supplies - for example, +10V and −5V - as long as the absolute difference between V+ and V− does not exceed 17V and neither supply violates its individual absolute maximum rating (V+ ≤ +17V, V− ≥ −17V). The analog signal range adjusts accordingly, spanning from V− to V+.

What is the purpose of the N.C. pins on the MAX4518CPD 14-pin DIP package?

The MAX4518CPD has three N.C. pins (pins 10, 11, and 12) that are not internally connected. They serve no electrical function and must remain unconnected. These pins exist for mechanical compatibility and package standardization - they do not require grounding, decoupling, or any other treatment in PCB layout.

How does the MAX4518CPD handle power-supply sequencing, and what happens if V− is applied before V+?

The MAX4518CPD recommends sequencing V+ first, then V−, then logic inputs. Applying V− before V+ risks exceeding absolute maximum ratings due to internal diode conduction. If strict sequencing cannot be guaranteed, external series diodes (as shown in Figure 1 of the datasheet) can provide overvoltage protection - though this reduces the effective analog signal range by ~0.7V per rail.