CD4066 Quad Bilateral Switches IC: Equivalent, Pinout and Use

The CD4066 is a CMOS logic-based Quad Bilateral Switch IC belonging to a CD4000 family of integrated circuits. that is, It has four analog/digital switches which can be controlled individually using a control pin. 

These switches can conduct in both directions making it bilateral, it is commonly used for multiplexing analog or digital signals. Unlike the CD4016 IC, it provides low on-state resistance and resistance remains consistent for a full range of the input signal. 

Symbol

Footprint

3D Model

-Quad Bilateral Switch for Multiplexing

-Very Low Internal Resistance

-Operating Voltage: 3V to 18V

-Switching Voltage: 20V (maximum)

-On-state Resistance: 5Ω (at 15V Vcc and 10kΩ Load)

-Output current High: -0.4mA

-Low Level Control pin Voltage: 0.9V (max)

-High Level Control pin Voltage: 11V (min @ 15V Vcc)

-Available in 14-pin PDIP, GDIP, PDSO packages

-Wide range of digital (15V) and Peak to Peak analog switching (±7.5 V)

-Noise immunity 0.45 VDD (Typ.)

-High Output-Voltage Ratio of 80 dB typically at fis = 10 kHz, RL = 1 kΩ

-Crosstalk between switches is –50 dB at fis = 8 MHz and RL = 1 kΩ which is very low

Texas Instruments CD4066BM technical specifications, attributes, parameters and parts with similar specifications to Texas Instruments CD4066BM.

The CD4066 is a bi-directional analog switching IC similar to CD4016, it is commonly used in multiplexing applications; it can also be used to isolate signals. The switch is bilateral and hence can be used for both digital and analog signals. The IC can operate from 3V to 18V but is commonly operated at 5V, 10Vor 15V nominal voltages. It can switch voltages up to 20V (peak).

The CD4066 has four bilateral switches that can be controlled independently using a digital signal. Each switch has two input/output pins called SWx-IN and SWx-OUT. Both of which can be used as input or output pins, they can also be used to switch variable voltages like PWM wave, sine wave, etc of low magnitude and frequency. These two pins will be controlled by the control pin. The below simulation shows one out of the four switches in the IC.

As you can see here the two switch pins are named X and Y and the control pin is named as C. By default when control pin is logic 0 (0V) the switch is open (not connected), but when a control signal is given to control pin C the switch closes and the LED glows. You can also use this IC as a 4-Input multiplexer by combining all the four switches to a common point as shown below.

■Used in 4-Input Multiplexer

■ Used in the sample and Hold circuits

■ Used in network switching

■ Used in dead band filter

■ Used in switching and multiplexing of snalog signals and digital signals

■ Used in signal gating, modulators, demodulators, choppers, commutating Switches

■ Used in sogic Implementation of Transmission-Gates

■ Used in squelch control

■ Used in the conversion of analog-to-digital and digital-to-analog signals

■ Used in digital control of frequency, phase impedance, and analog-signal gain

■ Used in CMOS logic implementation

Texas Instruments (TI) is an American technology company headquartered in Dallas, Texas, which designs and manufactures semiconductors and various integrated circuits, and sells them to electronic designers and manufacturers worldwide. It is one of the top 10 semiconductor companies in global sales. The company focuses on the development of analog chips and embedded processors, which account for more than 80% of its revenue. TI also produces TI digital light processing technology and educational technology products, including calculators, microcontrollers and multi-core processors. As of 2016, the company has 45,000 patents worldwide.

Download datasheets and manufacturer documentation for Texas Instruments CD4066BM.