CD4049 - Hex Inverting Buffer/Converter IC Documentation

Pin Configuration

CD4049 - Hex Inverting Buffer/Converter IC
The CD4049 is a high-speed, low-power Hex Inverting Buffer/Converter IC designed for use in digital systems. It is a 16-pin dual in-line package (DIP) device that provides six inverting buffers with high current output capability. Each buffer can be used as a level translator, enabling the interface between devices operating at different logic levels.
Pin Description:
Here's a comprehensive explanation of each pin on the CD4049 IC:
Pins 1-6: Input Pins (A1-A6)
These pins are the inputs to the six inverting buffers.
Each input pin can be connected to a digital signal source, such as a microcontroller or a logic gate.
Pins 7-12: Output Pins (Y1-Y6)
These pins are the outputs of the six inverting buffers.
Each output pin provides a buffered and inverted version of the corresponding input signal.
Pin 13: VCC (Positive Supply Voltage)
This pin is connected to the positive supply voltage (typically 5V) required for the IC's operation.
Pin 14: GND (Ground)
This pin is connected to the ground or negative supply voltage (typically 0V) required for the IC's operation.
Pin 15: No Connection (NC)
This pin is not connected internally and can be left unconnected.
Pin 16: No Connection (NC)
This pin is not connected internally and can be left unconnected.
Connection Structure:
To use the CD4049 IC, follow this connection structure:
1. Power Supply:
Connect Pin 13 (VCC) to the positive supply voltage (e.g., 5V).
Connect Pin 14 (GND) to the ground or negative supply voltage (e.g., 0V).
2. Input Signals:
Connect each input pin (A1-A6) to a digital signal source, such as a microcontroller or a logic gate.
3. Output Signals:
Connect each output pin (Y1-Y6) to a load, such as an LED, a relay, or another digital circuit.
4. Unused Pins:
Leave Pins 15 and 16 unconnected, as they are not internally connected.
Example Connection Diagram:
Here's a simple example connection diagram to illustrate the use of the CD4049 IC:
```
+---------------+
| CD4049 |
| (U1) |
+---------------+
|
|
v
+-----------+ | A1 | +-----------+
| Micro | | Y1 | | LED |
| Controller| +---------+ | (D1) |
+-----------+ +-----------+
|
|
v
+-----------+ | A2 | +-----------+
| Logic | | Y2 | | Relay |
| Gate | +---------+ | (K1) |
+-----------+ +-----------+
.
.
.
+-----------+ | A6 | +-----------+
| Sensor | | Y6 | | Buzzer |
| Output | +---------+ | (BU1) |
+-----------+ +-----------+
```
In this example, the CD4049 IC (U1) is powered by a 5V supply voltage connected to Pin 13 (VCC) and grounded to Pin 14 (GND). The input pins (A1-A6) are connected to digital signal sources, such as a microcontroller, a logic gate, or a sensor output. The output pins (Y1-Y6) are connected to load devices, such as LEDs, relays, or a buzzer.

Code Examples

CD4049 - Hex Inverting Buffer/Converter IC Documentation

Overview

The CD4049 is a hex inverting buffer/converter IC designed to provide high-current outputs and a wide range of operating voltage, making it suitable for various applications involving signal buffering, logic level shifting, and voltage translation.

Pinout

The CD4049 has 16 pins, with the following pinout configuration:

| Pin | Function |
| --- | --- |
| 1-6 | Input Pins (A) |
| 7-12 | Output Pins (Y) |
| 13 | VCC (Positive Supply Voltage) |
| 14 | GND (Ground) |
| 15 | Enable Input (EI) |
| 16 | Output Enable (OE) |

Features

High-current outputs (up to 10mA per output)
 Wide operating voltage range (3V to 18V)
 Inverting output stage
 Enable input (EI) for masterslave operation
 Output enable (OE) for three-state operation
 Schmitt trigger input circuitry for noise immunity

Code Examples

### Example 1: Signal Buffering and Level Shifting

In this example, we'll use the CD4049 to buffer a 3.3V logic signal and shift its level to 5V to drive a 5V microcontroller input.

Circuit Diagram

```
          +---------------+
          |  3.3V Signal  |
          +---------------+
                  |
                  |
                  v
+---------------+      +---------------+
|  CD4049 (U1)  |      |  5V MCU Input  |
+---------------+      +---------------+
|  A (Input)  |      |  Y (Output)  |
|  3.3V       |      |  5V         |
|  (Pin 1)     |      |  (Pin 7)     |
+---------------+      +---------------+
|  VCC (Pin 13) |------|  5V Power    |
+---------------+      +---------------+
|  GND (Pin 14) |------|  GND         |
+---------------+      +---------------+
```

Code Snippet (Arduino)
```c
#define INPUT_PIN 2  // Connect 3.3V signal to digital pin 2
#define OUTPUT_PIN 7  // Connect CD4049 output to digital pin 7

void setup() {
  pinMode(INPUT_PIN, INPUT);
  pinMode(OUTPUT_PIN, OUTPUT);
}

void loop() {
  bool getInput = digitalRead(INPUT_PIN);
  digitalWrite(OUTPUT_PIN, !getInput);  // Invert the signal
  delay(10);
}
```

### Example 2: Voltage Translation and Logic Level Shifting

In this example, we'll use the CD4049 to translate a 1.8V logic signal to 3.3V and shift its logic level to drive a 3.3V microcontroller input.

Circuit Diagram

```
          +---------------+
          |  1.8V Signal  |
          +---------------+
                  |
                  |
                  v
+---------------+      +---------------+
|  CD4049 (U1)  |      |  3.3V MCU Input  |
+---------------+      +---------------+
|  A (Input)  |      |  Y (Output)  |
|  1.8V       |      |  3.3V         |
|  (Pin 2)     |      |  (Pin 8)     |
+---------------+      +---------------+
|  VCC (Pin 13) |------|  3.3V Power    |
+---------------+      +---------------+
|  GND (Pin 14) |------|  GND         |
+---------------+      +---------------+
```

Code Snippet (Python)
```python
import RPi.GPIO as GPIO

GPIO.setmode(GPIO.BCM)
INPUT_PIN = 2  # Connect 1.8V signal to GPIO pin 2
OUTPUT_PIN = 8  # Connect CD4049 output to GPIO pin 8

def main():
  GPIO.setup(INPUT_PIN, GPIO.IN)
  GPIO.setup(OUTPUT_PIN, GPIO.OUT)

while True:
    input_state = GPIO.input(INPUT_PIN)
    GPIO.output(OUTPUT_PIN, not input_state)  # Invert the signal
    time.sleep(0.01)

if __name__ == '__main__':
  main()
```

Important Notes

Ensure the VCC pin is connected to a stable power supply within the recommended operating voltage range.
 Use the enable input (EI) and output enable (OE) pins to control the buffer/output stage according to your specific application requirements.

By following these examples and understanding the CD4049's features and pinout, you can effectively utilize this component in various IoT projects involving signal buffering, logic level shifting, and voltage translation.