How to Use CD4052BE: Examples, Pinouts, and Specs

The CD4052BE, manufactured by Texas Instruments, is a dual 4-channel analog multiplexer/demultiplexer. This versatile component is designed to route analog or digital signals to a common output or input, making it an essential part of many electronic circuits. With its low ON resistance and low OFF leakage current, the CD4052BE ensures minimal signal loss and high fidelity in signal routing applications.

• Signal Routing: Used to switch between multiple analog or digital signals.
• Data Acquisition Systems: Helps in selecting different sensors or input sources.
• Audio Systems: Routes audio signals to different channels.
• Communication Systems: Manages multiple data lines.
• Instrumentation: Used in measurement systems to select different input signals.

1. Power Supply: Connect VDD to the positive supply voltage (3V to 15V) and VSS to ground.
2. Signal Connections: Connect the signals you want to route to the X0-X3 and Y0-Y3 pins.
3. Common I/O: Connect the common input/output signals to the IN/OUT X and IN/OUT Y pins.
4. Address Selection: Use the A and B pins to select the desired channel. The combination of A and B determines which channel is connected to the common I/O.
5. Inhibit Control: Use the INH pin to disable the multiplexer. When INH is high, all channels are disconnected.

• Decoupling Capacitors: Place decoupling capacitors (0.1µF) close to the VDD pin to filter out noise.
• Signal Integrity: Keep signal traces as short as possible to minimize noise and signal degradation.
• Unused Channels: If any channels are not used, connect them to ground to avoid floating inputs.
• Inhibit Pin: Use the INH pin to disable the multiplexer when not in use to save power and reduce noise.

/*
 * Example code to demonstrate the use of CD4052BE with Arduino UNO.
 * This code selects different channels of the multiplexer and reads
 * analog signals from them.
 */

const int A_PIN = 2; // Address pin A connected to digital pin 2
const int B_PIN = 3; // Address pin B connected to digital pin 3
const int INH_PIN = 4; // Inhibit pin connected to digital pin 4
const int IN_OUT_X_PIN = A0; // Common I/O pin connected to analog pin A0

void setup() {
  pinMode(A_PIN, OUTPUT);
  pinMode(B_PIN, OUTPUT);
  pinMode(INH_PIN, OUTPUT);
  digitalWrite(INH_PIN, LOW); // Enable the multiplexer
  Serial.begin(9600);
}

void loop() {
  for (int channel = 0; channel < 4; channel++) {
    selectChannel(channel);
    int sensorValue = analogRead(IN_OUT_X_PIN);
    Serial.print("Channel ");
    Serial.print(channel);
    Serial.print(": ");
    Serial.println(sensorValue);
    delay(1000);
  }
}

void selectChannel(int channel) {
  digitalWrite(A_PIN, channel & 0x01);
  digitalWrite(B_PIN, (channel >> 1) & 0x01);
}

1. No Signal Output:

   • Solution: Check the power supply connections (VDD and VSS). Ensure the INH pin is low to enable the multiplexer.

2. High Signal Loss:

   • Solution: Verify that the signal levels are within the specified input voltage range. Check for proper grounding and minimize trace lengths.

3. Unexpected Channel Selection:

   • Solution: Ensure the address pins (A and B) are correctly set. Check for loose connections or shorts.

• Check Connections: Ensure all connections are secure and correctly wired according to the pin configuration.
• Verify Power Supply: Make sure the supply voltage is within the specified range (3V to 15V).
• Use Decoupling Capacitors: Place capacitors close to the VDD pin to filter out noise.
• Test Individual Channels: Test each channel individually to isolate any issues.

By following this documentation, users can effectively integrate the CD4052BE into their electronic projects, ensuring reliable and efficient signal routing.