Mastering CD4067 Circuits: Essential Design Tips

CD4067 Analog Multiplexer is a versatile 16-channel analog multiplexer/demultiplexer used for expanding analog inputs or outputs in electronic circuits.

Design Tips for CD4067

1. How to avoid VDD’s current drawing?

In certain applications, the external load resistor current may include both VDD and signal-line components. To avoid drawing VDD current when switching current flows into the transmission gate inputs, the voltage drop across the bidirectional switch must not exceed 0.8 volts. No VDD current will flow through RL if the switch current flows into terminal 1 on the CD4067BMS, terminals 1 and 17 on the CD4097BMS.

2. How do we minimize noise while using CD4067?

Use bypass capacitors (typically 0.1 μF) between VDD and VSS and between VEE and VSS to stabilize the power supply and minimize noise.

3. Does the working of the circuit depend on the temperature?

The CD4067’s performance can vary with temperature, so operate it within the specified temperature range for best results.

4. What are the design considerations when designing a PCB using CD4067?

Keep the analog signal paths short and avoid routing them close to noisy digital signals to minimize interference and signal degradation.

5. What is the difference between CD4067B, CD4067BE, CD4067BF, CD4067BP and CD4067BM?

CD4067B is the base part number, representing the general function of the IC. The other suffixes indicate different packages. The CD4067BE and CD4067BF both represent DIP packages, where the suffix E is for the plastic DIP package while the F is for the ceramic DIP package. The CD4067BP indicates the TSSOP package and CD4067BM indicates the SOIC package.

➡️Applications: Signal Gating

➡️Alternatives: CD4051,74HC4051

➡️Datasheet: CD4067 datasheet

➡️Manufacturer: Texas Instruments