Part Number: CD4066BM96

Manufacturer: Texas Instruments

Description: IC BILATERAL SW 1 X 1:1 14SOIC

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Technical Specifications of CD4066BM96

Datasheet  CD4066BM96 datasheet
Category Integrated Circuits (ICs)
Family Logic – Signal Switches, Multiplexers, Decoders
Manufacturer Texas Instruments
Series 4000B
Packaging Tape & Reel (TR)
Part Status Active
Type Bilateral, FET Switches
Circuit 1 x 1:1
Independent Circuits 4
Current – Output High, Low
Voltage Supply Source Dual Supply
Voltage – Supply 3 V ~ 18 V
Operating Temperature -55°C ~ 125°C
Mounting Type Surface Mount
Package / Case 14-SOIC (0.154″, 3.90mm Width)
Supplier Device Package 14-SOIC

CD4066BM96 Introduction

The CD4066BM96 is a quad bilateral switch used often and is very important in many electronic circuits. As a CMOS IC, it has four independent switches that can switch analog signals with a peak-to-peak voltage of up to 15V. The CD4066BM96 is known for having low distortion, high isolation, and accurate switching. This makes it a popular choice for applications like switching audio and video signals, communications systems, and precision instrumentation. This full guide will tell you everything you need to know about the CD4066BM96.


The CD4066B device is a quad bilateral switch that can send analog or digital signals or mix them together. It has the same pinout as the CD4016B device, but its on-state resistance is much lower. Also, the on-state resistance stays pretty much the same over the whole range of signal input. The CD4066B device is made up of four two-way switches that each have their own controls. The control signal simultaneously turns on or off the p and n components of a switch. Each switch’s n-channel device well is linked to the input or VSS when the switch is turned on (when the switch is off).

This setup stops the threshold voltage of the switch transistor from changing with the input signal. As a result, the on-state resistance stays low over the full range of the operating signal. One advantage of multi-channel switches over single-channel switches is that the largest voltage swings of the input signals can match the full supply voltage, and the on-state impedance is more constant over the range of the input signal. But for sample-and-hold applications, you should use the CD4016B device.


  • Across the entire peak-to-peak signal range, on-state resistance is flat.
  • 80 dB for a high on or off output voltage ratio characteristic at fis = 10 kHz, RL = 1 kHz.
  • Highest Control Input Impedance: 1012 (typical) (Control Circuit Separated From Signal Circuit).
  • Low Switch to Switch Crosstalk –50 dB typical at 8 MHz fis, 1 kHz RL.
  • Reduces output signal transients with matched control-input to signal-output capacitance.
  • Switch-on frequency response is typically 40 MHz.

Detailed Description.

With four separate digitally controlled analog switches and a VSS bias voltage, the CD4066B enables the use of various voltage levels for low output. The control signal biases the p and n devices of a particular switch simultaneously on or off.

Each switch has an n-channel device whose well is connected to either the input (when the switch is turned on) or VSS (when the switch is off). As a result, the switch’s output goes to VSS when the device’s control is low and to VDD when the device’s control is high.

Feature Description

There are additional alternatives for the outputs because each switch has a unique set of control pins. When the device control is low, bias voltage enables the output to be something other than 0 V. 20 V is the CD4066B’s high absolute maximum voltage for VDD.

Application Information

The VDD current capability should be greater than VDD/RL (RL = the effective external load of the four bilateral switches on the CD4066B device) in situations where the VDD and the signal inputs are powered by separate power sources. When power is added to or removed from the CD4066B device, this clause stops any clamping or sustained current flow on the VDD supply.

In some circumstances, both VDD and signal-line components may be present in the external load-resistor current. When switch current enters pins 1, 4, 8, or 11, the voltage drop across the bidirectional switch must be under 0.8 V to prevent drawing VDD current (calculated from ron values shown).

Power Supply Recommendations

Any voltage between the MIN and MAX supply voltage ratings listed in the Recommended Operational Conditions can be used for the power supply. To avoid power disturbances, a suitable bypass capacitor should be present on each VCC pin. 0.1-F is advised for devices with a single supply; if there are several VCC pins, 0.01-F or 0.022-F is advised for each power pin. It is OK to parallel many bypass capacitors to filter out noise at various frequencies. It is typical to utilize a 0.1-F and a 1-F in parallel. For best results, the bypass capacitor should be mounted as close as feasible to the power pin.

Layout Guidelines

When using devices with more than one bit of logic, the inputs must never float. Digital logic devices often have functions or parts of functions that aren’t used. For example, only two of a triple-input AND gate’s inputs are used, or only three of the four buffer gates are used. You can’t leave these input pins unconnected because the undefined voltages at the outside connections lead to undefined operational states. All digital logic devices’ inputs that aren’t being used must be connected to a high or low bias so they don’t float.

The logic level that should be used for each unused input depends on how the device is supposed to work. Most of the time, they are connected to GND or VCC, depending on which makes more sense or is easier. Unless the part is a transceiver, it is usually fine to let the outputs float. If the transceiver has an output enable pin, when it is pressed, it turns off the output part of the part. This doesn’t turn off the input part of the I/Os, so when they are turned off, they can’t float.


In conclusion, the CD4066BM96 is a reliable quad bilateral switch that can be used in a wide range of electronic circuits. Its low distortion, high isolation, and accurate switching make it perfect for switching audio and video signals, communications systems, and precision instruments. But when making a circuit, its low signal level and sensitivity to ESD should be taken into account.

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