The CD4052BC is a reliable analog multiplexer designed to simplify signal routing using digital control. It allows you to switch between multiple signals efficiently while maintaining stable performance and low power consumption. This article will discuss the CD4052BC overview, pinout details, specifications, features, working in circuit, equivalents, applications, comparison with CD4052, and ordering variants.

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CD4052BC Overview

The CD4052BC is a dual 4-channel analog multiplexer/demultiplexer designed to switch and route signals using digital control. It is part of the CMOS family and offers low ON resistance with very low OFF leakage, helping maintain signal integrity during operation. The device supports a wide voltage range, allowing it to handle both positive and negative signal levels with stable performance.

It is an improved CMOS version of CD4052 with better noise immunity and stability. This IC uses two binary control inputs (A and B) along with an inhibit input to manage channel selection. By changing the logic levels of A and B, one of four channels is connected to the output, while the inhibit pin can disable all channels when needed. Its internal design ensures smooth switching and low power consumption, making it reliable for controlled signal routing in electronic systems.

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Pinout Details of CD4052BC

CD4052BC Equivalent Model

• CD4052

• CD4052BE

• CD4052BM

• NTE4052

• HEF4052B

• MC14052B

• HCF4052BE

• TC4052BP

• 74HC4052

• 74HCT4052

Logic Diagram of CD4052BC

Specifications of CD4052BC

Features of CD4052BC

Wide Signal Handling Range

The CD4052BC supports a wide range of both digital and analog signal levels, allowing it to handle digital inputs from 3V to 15V and analog signals up to 15V peak-to-peak. This makes it flexible for circuits that require switching between different signal types while maintaining stable performance across varying voltage levels.

Low ON Resistance

The device features low ON resistance, typically around 80Ω at VDD − VEE = 15V. This ensures minimal signal loss when a channel is active, helping maintain signal integrity and improving overall efficiency during switching operations.

High OFF Resistance

When channels are turned off, the CD4052BC provides high OFF resistance with very low leakage currents (around ±10 pA typical). This helps prevent unwanted signal flow between channels and ensures better isolation.

Logic-Level Compatibility

The IC supports logic-level conversion, allowing digital control signals (3V to 15V) to switch analog signals effectively. This makes it easy to interface with standard CMOS logic without additional level-shifting components.

Matched Switching Characteristics

The switch channels are designed with matched ON resistance (around 5Ω variation typical), ensuring consistent performance across all channels. This helps maintain balanced signal routing and reduces distortion.

Low Power Consumption

The CD4052BC consumes very low quiescent power, typically around 1 µW under standard conditions. This makes it efficient for circuits where power saving is important while still maintaining reliable switching performance.

Dual Independent Multiplexer Structure

It contains two independent 4-channel multiplexers within a single IC. This allows simultaneous control of two separate signal paths, increasing design flexibility and reducing the need for additional components.

Inhibit Control Function

The inhibit (INH) pin allows all channels to be disabled at once. This feature is useful for quickly isolating signals and preventing unintended connections during switching.

Wide Operating Voltage Range

The IC operates over a broad supply voltage range from 3V to 18V, with support for dual supply configurations using VEE. This enables it to work in both single-supply and dual-supply systems.

Low Crosstalk and Noise

The CD4052BC is designed to minimize crosstalk between channels, ensuring clean signal transmission. This improves reliability in circuits where signal separation is critical.

CD4052BC Working in Circuit

How the CD4052BC is used to control signal routing using digital logic and a transistor stage? The IC (U6) is powered with a dual supply, where VDD is connected to +18V, VSS is grounded, and VEE is tied to ground, allowing it to handle analog signals within that range. The X and Y sections of the multiplexer are available, but the control focus is on how the selection lines (A and B) are driven.

On the left side, the control signal comes from an ESP32 (labeled “digitout-esp32”). This signal passes through a resistor (R20) into the base of the 2N3904 transistor (Q9). The transistor acts as a switch, helping translate the microcontroller’s output into a stable control signal. The resistors around Q9 (R1206 and R24) ensure proper biasing and prevent unwanted floating states.

The output of this stage drives the gate of the IRF5305 MOSFET (Q8). This MOSFET acts as a high-side switch, controlling the voltage level applied to the CD4052BC control pins (A and B). When the MOSFET turns ON, it pulls the control line to a defined level, allowing the multiplexer to select a specific channel. When it turns OFF, the control line changes state, switching to another channel.

Inside the CD4052BC, the selected channel is determined by the logic levels at pins A and B. Based on these inputs, one of the X or Y channels (X0–X3 or Y0–Y3) is connected to the common output. The inhibit pin (INH) can disable all channels if needed, but in this circuit, it appears unused or fixed.

CD4052BC as 4:1 Multiplexer

The CD4052BC can be configured to operate as a 4:1 multiplexer, but it is important to understand that it contains two independent sections. Each section has four input channels, labeled X0–X3 and Y0–Y3, with separate outputs X and Y. Instead of combining signals into a single output, the device selects one input from each section at the same time based on the control inputs.

The channel selection is controlled by two binary inputs, A and B. These inputs determine which channel is connected to the outputs. When the logic levels on A and B change, the corresponding input channels from both X and Y groups are connected to their respective outputs. For example, if A is HIGH and B is LOW, the second channel (Channel 1) is selected, connecting X1 to X and Y1 to Y simultaneously.

The inhibit (INH) pin provides an additional level of control. When this pin is set HIGH, all channels are turned OFF, disconnecting both outputs regardless of the select inputs. This ensures that no signal passes through when isolation is required.

CD4052BC operate as a 1:4 Demultiplexer

The CD4052BC can also operate as a 1:4 demultiplexer, where a single input signal is directed to one of multiple output channels. However, it is important to note that the device contains two independent sections, so both X and Y paths are controlled at the same time. The common pins X and Y act as the inputs, and the selected signals are routed to one of the corresponding output channels (X0–X3 and Y0–Y3).

Channel selection is controlled by the binary inputs A and B. These control lines determine which output pair is active. When a specific combination of A and B is applied, the input signals at X and Y are simultaneously connected to the matching output channels. For example, when A is LOW and B is HIGH, the third channel is selected, routing the input signals to X2 and Y2.

The inhibit (INH) pin adds control by disabling all connections when set HIGH. This ensures that no output channel is active, even if the select inputs are set.

Truth Table

Applications of CD4052BC

• Signal routing

• Data acquisition systems

• Analog signal switching

• Audio signal switching

• Channel selection circuits

• Multiplexing and demultiplexing

• Test and measurement equipment

• Communication systems

• Sensor signal selection

• Digital control of analog signals

• Signal path selection

• Switching networks

Comparison: CD4052BC vs CD4052

CD4052BC Ordering Variants

CD4052BC Mechanical Dimensions

Conclusion

The CD4052BC’s improved design over the standard CD4052 ensures better noise performance, consistent switching behavior, and reliable operation across different voltage levels. With its dual multiplexer structure, simple control interface, and low power consumption, it provides a practical way to manage multiple signal paths within a single device. By understanding its pin configuration, features, and working principle, you can confidently integrate the CD4052BC into your circuit design. If you are looking for a dependable multiplexer with improved performance and flexibility, the CD4052BC is a solid option to consider.