Electronic circuits often require a reliable way to control the flow of signals without using mechanical switches. In many analog and digital systems, integrated circuits designed for signal switching help simplify circuit design and improve performance. This article will discuss the CD4016 CMOS IC pinout configuration, circuit diagram, specifications, key features, and more.

Catalog

CD4016 CMOS IC Basic

The CD4016 is a CMOS integrated circuit that contains four independent bilateral analog switches in a single package. It belongs to the 4000-series logic family and is often described as a quad bilateral switch or analog multiplexer. Each internal switch can be controlled by a digital input signal, allowing the circuit to electronically connect or disconnect signal paths.

Inside the CD4016, MOSFET transistors form switches that can handle both analog and digital signals. Because the switches are bilateral, signals can pass in either direction between the two terminals when the control input is HIGH, and the path is disconnected when the control input is LOW. The device operates over a wide supply voltage range, typically from 3V to 15V, making it flexible for many circuit designs.

The CD4016B is the improved version of this IC, offering better electrical characteristics and more stable specifications across common supply voltages while maintaining the same quad-switch structure.

CD4016B CAD Models

CD4016BE symbol, footprint, 3d model.

CD4016BE Symbol

CD4016B Footprint

CD4016B 3D Model

CD4016B Pinout Details

Alternatives & Equivalent Model

• CD4066

• CD4066B

• MC14016B

• HEF4016B

• HCF4016B

• TC4016B

• NTE4016

• 74HC4016

• 74HCT4016

CD4016B Circuit Diagram

The CD4016B circuit diagram shows how a control signal operates an internal analog switch. The CONTROL (VC) input is protected by diodes connected to VDD and VSS, which help prevent voltage spikes or signals beyond the supply range from damaging the IC. A resistor network helps stabilize the control input and ensures proper switching behavior.

The control signal then passes through two inverter stages, which shape and strengthen the logic signal. These inverters drive the internal switching transistors, ensuring the switch turns on or off clearly depending on the control voltage level.

At the output stage, a pair of complementary MOSFETs (N-channel and P-channel) forms the bilateral analog switch. When the control input is high, both transistors conduct and create a low-resistance path between the IN/OUT terminals, allowing signals to pass in either direction. When the control input is low, the transistors turn off, isolating the two terminals and stopping the signal flow.

Functional Block Diagram

The CD4016B IC contains four independent bilateral analog switches, labeled SW A, SW B, SW C, and SW D. Each switch connects a pair of signal terminals labeled IN/OUT or OUT/IN, meaning the signal can pass in either direction when the switch is turned on.

Each switch is controlled by a dedicated control input (CONT A, CONT B, CONT C, CONT D). When a control input receives a logic HIGH signal, the corresponding switch closes and allows the signal to pass between its two terminals. When the control input is LOW, the switch opens and isolates the signal path.

The IC operates using VDD as the positive supply and VSS as ground. Because all four switches work independently, the CD4016B can control multiple analog or digital signals within a single chip while sharing the same power supply.

CD4016B CMOS IC Specifications

CD4016B CMOS IC Features

Wide Supply Voltage Range

The CD4016B supports supply voltages up to about 20 V for digital switching or ±10 V peak-to-peak analog signals. This wide operating range allows the IC to work in many CMOS systems and analog circuits with different voltage levels.

Typical 280 Ω On-State Resistance

The switch typically has an on-state resistance of around 280 Ω when operating at 15 V. This relatively low resistance allows signals to pass through the switch with minimal voltage drop and power loss.

Matched Switch On-Resistance

The IC maintains matched on-state resistance within about 10 Ω across its internal switches. This helps ensure consistent performance between channels, which is useful when multiple signals are switched simultaneously.

High On/Off Output Voltage Ratio

The CD4016B provides a high on/off output voltage ratio of about 65 dB. This means the switch effectively isolates signals when turned off while allowing clean signal transmission when turned on.

Low Signal Distortion

The device offers high linearity with less than 0.5% distortion under typical conditions. This makes it suitable for handling analog signals where signal quality and accuracy are important.

Extremely Low Off-State Leakage

When the switch is turned off, the leakage current is extremely small, typically around 100 pA. This results in very high off-state resistance and helps prevent unwanted signal leakage between terminals.

High Control Input Impedance

The control input has a very high impedance (around 10¹² Ω). This minimizes the load on the driving circuit and ensures the control signal can easily operate the internal switches without requiring significant current.

Low Crosstalk Between Channels

The IC features low crosstalk of about −50 dB between switches. This reduces interference between different channels and helps maintain signal integrity in multi-signal switching applications.

Matched Control-Input to Signal-Output Capacitance

The device is designed with matched internal capacitances, which helps reduce signal transients during switching. This improves stability and reduces unwanted spikes when the switch changes state.

High Frequency Switching Capability

The CD4016B supports frequency response up to about 40 MHz when the switch is on. This allows the IC to handle relatively high-speed analog or digital signals in switching and multiplexing circuits.

CD4016B CMOS IC Applications

• Analog signal switching

• Signal multiplexing

• Modulators

• Demodulators

• Commutating switches

• Digital signal switching

• Digital multiplexing systems

• CMOS logic implementation

• Analog-to-digital conversion systems

• Digital-to-analog conversion systems

• Analog signal gain control

Ordering/Packaging Types

CD4016B Mechanical Dimensions

Manufacturer

Texas Instruments (TI) has dependable manufacturing capabilities for producing CMOS logic devices such as the CD4016B quad bilateral switch. The company operates advanced semiconductor fabrication facilities that support high-quality CMOS process technology, ensuring reliable analog switching performance and consistent electrical characteristics. TI’s manufacturing process includes precise wafer fabrication, automated assembly, and rigorous testing procedures to guarantee device reliability across wide temperature and voltage ranges. The company also maintains strict quality control and long-term product availability, making its CD4000-series logic ICs suitable for industrial, consumer electronics, and embedded system applications.