Dual 4 Input NAND Gate IC - CD4012 Documentation

Component Documentation

Dual 4-Input NAND Gate IC - CD4012

Overview

The CD4012 is a quad 2-input NAND gate integrated circuit (IC) that belongs to the 4000 series of CMOS logic gates. The device is a low-power, low-voltage, and high-noise immunity component that is widely used in various digital electronic circuits. The CD4012 is a dual 4-input NAND gate, meaning it consists of two independent 4-input NAND gates in a single package.

Functional Description

The CD4012 is designed to perform logical NAND operations on its input signals. The NAND gate is a digital logic gate that produces an output only when all the input signals are high (logic level 1). The output of the NAND gate is low (logic level 0) when one or more input signals are low.

The CD4012 has two separate NAND gates, each with four input pins (A, B, C, and D). The input pins are connected to the logic inputs of the circuit, and the output pins (Y and Z) provide the logical NAND output of the respective gates.

The truth table for each NAND gate in the CD4012 is as follows

| A | B | C | D | Y |

| --- | --- | --- | --- | --- |

| 0 | 0 | 0 | 0 | 1 |

| 0 | 0 | 0 | 1 | 1 |

| 0 | 0 | 1 | 0 | 1 |

| 0 | 0 | 1 | 1 | 1 |

| 0 | 1 | 0 | 0 | 1 |

| 0 | 1 | 0 | 1 | 1 |

| 0 | 1 | 1 | 0 | 1 |

| 0 | 1 | 1 | 1 | 1 |

| 1 | 0 | 0 | 0 | 1 |

| 1 | 0 | 0 | 1 | 1 |

| 1 | 0 | 1 | 0 | 1 |

| 1 | 0 | 1 | 1 | 1 |

| 1 | 1 | 0 | 0 | 0 |

| 1 | 1 | 0 | 1 | 0 |

| 1 | 1 | 1 | 0 | 0 |

| 1 | 1 | 1 | 1 | 0 |

Key Features

Low Power Consumption: The CD4012 has a low power consumption of 1 W per gate at 5 V and 1 kHz, making it suitable for battery-powered devices.
High Noise Immunity: The CD4012 has a high noise immunity of 0.45 V min and 0.55 V max, ensuring reliable operation in noisy environments.
Wide Operating Voltage Range: The IC can operate with a supply voltage range of 3 V to 18 V, making it suitable for various digital electronic circuits.
High-Speed Operation: The CD4012 has a propagation delay time of 30 ns (typical), enabling fast switching times and high-frequency operation.
Compliance with TTL and DTL: The CD4012 is compatible with TTL (Transistor-Transistor Logic) and DTL (Diode-Transistor Logic) levels, allowing it to interface with a wide range of digital circuits.
Dual 4-Input NAND Gate: The IC features two independent 4-input NAND gates, providing flexibility in circuit design and implementation.
14-Pin DIP Package: The CD4012 is available in a 14-pin dual in-line package (DIP), making it easy to integrate into printed circuit boards (PCBs) and other electronic assemblies.

Applications

Digital Logic Circuits: The CD4012 is suitable for use in digital logic circuits, such as counters, decoders, and multiplexers.
Microprocessor and Microcontroller Interfacing: The IC can be used to interface with microprocessors and microcontrollers, providing additional logic functionality.
Analog-to-Digital and Digital-to-Analog Converters: The CD4012 can be used in analog-to-digital and digital-to-analog converters to provide additional digital logic functions.
Radio Frequency (RF) and Microwave Circuits: The IC's low power consumption and high noise immunity make it suitable for use in RF and microwave circuits.

Pinout

The pinout for the CD4012 is as follows

| Pin Number | Pin Name | Function |

| --- | --- | --- |

| 1 | VDD | Positive Supply Voltage |

| 2 | A1 | Input 1, Gate 1 |

| 3 | B1 | Input 2, Gate 1 |

| 4 | C1 | Input 3, Gate 1 |

| 5 | D1 | Input 4, Gate 1 |

| 6 | Y1 | Output, Gate 1 |

| 7 | A2 | Input 1, Gate 2 |

| 8 | B2 | Input 2, Gate 2 |

| 9 | C2 | Input 3, Gate 2 |

| 10 | D2 | Input 4, Gate 2 |

| 11 | Y2 | Output, Gate 2 |

| 12 | GND | Negative Supply Voltage |

| 13 | NC | No Connection |

| 14 | NC | No Connection |

Absolute Maximum Ratings

| Parameter | Value |

| --- | --- |

| Supply Voltage (VDD) | 18 V |

| Input Voltage (VIN) | -0.5 V to VDD + 0.5 V |

| Operating Temperature (TOPR) | -40C to +85C |

| Storage Temperature (TSTG) | -65C to +150C |

Recommended Operating Conditions

| Parameter | Value |

| --- | --- |

| Supply Voltage (VDD) | 5 V 10% |

| Input Voltage (VIN) | 0 V to VDD |

| Operating Temperature (TOPR) | 0C to +70C |

Pin Configuration

Dual 4 Input NAND Gate IC - CD4012
The CD4012 is a dual 4-input NAND gate integrated circuit (IC) used to perform logical operations in digital electronic circuits. It consists of two independent 4-input NAND gates, each with its own set of inputs and outputs.
Pinouts:
The CD4012 has a total of 14 pins, which are explained below:
Pin 1: VCC
Function: Positive power supply voltage
Description: This pin is connected to the positive power supply voltage (typically +5V) to power the IC.
Connection: Connect to a positive voltage source (e.g., +5V) through a decoupling capacitor (e.g., 0.1uF).
Pin 2: Input 1A ( Gate 1, Input 1)
Function: Input 1 of NAND Gate 1
Description: This pin is one of the four inputs to NAND Gate 1.
Connection: Connect to a digital input signal or a logic level output from another IC.
Pin 3: Input 2A (Gate 1, Input 2)
Function: Input 2 of NAND Gate 1
Description: This pin is another input to NAND Gate 1.
Connection: Connect to a digital input signal or a logic level output from another IC.
Pin 4: Input 3A (Gate 1, Input 3)
Function: Input 3 of NAND Gate 1
Description: This pin is another input to NAND Gate 1.
Connection: Connect to a digital input signal or a logic level output from another IC.
Pin 5: Input 4A (Gate 1, Input 4)
Function: Input 4 of NAND Gate 1
Description: This pin is the fourth and final input to NAND Gate 1.
Connection: Connect to a digital input signal or a logic level output from another IC.
Pin 6: Output 1 (Gate 1, Output)
Function: Output of NAND Gate 1
Description: This pin is the output of NAND Gate 1, which is the result of the NAND operation of the four inputs.
Connection: Connect to a digital input of another IC, a microcontroller, or a load (e.g., LED, relay) through a suitable current-limiting resistor.
Pin 7: Input 1B (Gate 2, Input 1)
Function: Input 1 of NAND Gate 2
Description: This pin is one of the four inputs to NAND Gate 2.
Connection: Connect to a digital input signal or a logic level output from another IC.
Pin 8: Input 2B (Gate 2, Input 2)
Function: Input 2 of NAND Gate 2
Description: This pin is another input to NAND Gate 2.
Connection: Connect to a digital input signal or a logic level output from another IC.
Pin 9: Input 3B (Gate 2, Input 3)
Function: Input 3 of NAND Gate 2
Description: This pin is another input to NAND Gate 2.
Connection: Connect to a digital input signal or a logic level output from another IC.
Pin 10: Input 4B (Gate 2, Input 4)
Function: Input 4 of NAND Gate 2
Description: This pin is the fourth and final input to NAND Gate 2.
Connection: Connect to a digital input signal or a logic level output from another IC.
Pin 11: Output 2 (Gate 2, Output)
Function: Output of NAND Gate 2
Description: This pin is the output of NAND Gate 2, which is the result of the NAND operation of the four inputs.
Connection: Connect to a digital input of another IC, a microcontroller, or a load (e.g., LED, relay) through a suitable current-limiting resistor.
Pin 12: VSS
Function: Negative power supply voltage
Description: This pin is connected to the negative power supply voltage (typically GND) to power the IC.
Connection: Connect to a negative voltage source (e.g., GND) through a decoupling capacitor (e.g., 0.1uF).
Pin 13: No Connection
Function: No internal connection
Description: This pin is not connected internally and should be left unconnected.
Connection: Leave unconnected.
Pin 14: No Connection
Function: No internal connection
Description: This pin is not connected internally and should be left unconnected.
Connection: Leave unconnected.
Connection Structure:
When using the CD4012, ensure to:
1. Connect VCC (Pin 1) to a positive power supply voltage (+5V) through a decoupling capacitor (e.g., 0.1uF).
2. Connect VSS (Pin 12) to a negative power supply voltage (GND) through a decoupling capacitor (e.g., 0.1uF).
3. Connect the input pins (Pins 2-5 and 7-10) to digital input signals or logic level outputs from other ICs.
4. Connect the output pins (Pins 6 and 11) to digital inputs of other ICs, microcontrollers, or loads (e.g., LEDs, relays) through suitable current-limiting resistors.
5. Leave Pins 13 and 14 unconnected.
By following this pinout and connection structure, you can effectively use the CD4012 dual 4-input NAND gate IC in your digital electronic projects.

Code Examples

Dual 4 Input NAND Gate IC - CD4012 Documentation

Overview

The CD4012 is a dual 4-input NAND gate integrated circuit (IC) designed for use in digital logic circuits. It provides two independent 4-input NAND gates in a single package, making it a versatile component for implementing complex digital logic functions.

Pinout

The CD4012 IC has a 14-pin dual in-line package (DIP) with the following pinout:

```
  1  | 2  | 3  | 4  | 5  | 6  | 7  | 8  | 9  | 10 | 11 | 12 | 13 | 14
  Vcc | 1A | 1B | 1C | 1D | 1Y | GND | 2A | 2B | 2C | 2D | 2Y | Vcc
```

Truth Table

The truth table for a single 4-input NAND gate is as follows:

| A | B | C | D | Y |
| --- | --- | --- | --- | --- |
| 0 | 0 | 0 | 0 | 1 |
| 0 | 0 | 0 | 1 | 1 |
| 0 | 0 | 1 | 0 | 1 |
| 0 | 0 | 1 | 1 | 1 |
| 0 | 1 | 0 | 0 | 1 |
| 0 | 1 | 0 | 1 | 1 |
| 0 | 1 | 1 | 0 | 1 |
| 0 | 1 | 1 | 1 | 1 |
| 1 | 0 | 0 | 0 | 1 |
| 1 | 0 | 0 | 1 | 1 |
| 1 | 0 | 1 | 0 | 1 |
| 1 | 0 | 1 | 1 | 1 |
| 1 | 1 | 0 | 0 | 1 |
| 1 | 1 | 0 | 1 | 1 |
| 1 | 1 | 1 | 0 | 1 |
| 1 | 1 | 1 | 1 | 0 |

Example 1: Simple NAND Gate Circuit

In this example, we will demonstrate how to use the CD4012 IC to implement a simple NAND gate circuit.

Circuit Diagram:

```
  +-----------+
  |          |
  |  CD4012  |
  |          |
  +-----------+
           |
           |
           v
  +-----------+      +-----------+
  |          |      |          |
  |  Switch  |      |  LED    |
  |          |      |          |
  +-----------+      +-----------+
           |              |
           |              |
           v              v
  +-----------+      +-----------+
  |          |      |          |
  |  Input A |      |  Input B |
  |          |      |          |
  +-----------+      +-----------+
```

Code Example (Arduino):
```c
const int inputA = 2;
const int inputB = 3;
const int ledPin = 9;

void setup() {
  pinMode(inputA, INPUT);
  pinMode(inputB, INPUT);
  pinMode(ledPin, OUTPUT);
}

void loop() {
  int inputStateA = digitalRead(inputA);
  int inputStateB = digitalRead(inputB);
  
  if (!(inputStateA && inputStateB)) {
    digitalWrite(ledPin, HIGH);
  } else {
    digitalWrite(ledPin, LOW);
  }
}
```

Example 2: 4-Bit Binary Encoder

In this example, we will demonstrate how to use the CD4012 IC to implement a 4-bit binary encoder.

Circuit Diagram:
```
  +-----------+
  |          |
  |  CD4012  |
  |          |
  +-----------+
           |
           |
           v
  +-----------+      +-----------+
  |          |      |          |
  |  Switch 0 |      |  Switch 1 |
  |          |      |          |
  +-----------+      +-----------+
           |              |
           |              |
           v              v
  +-----------+      +-----------+
  |          |      |          |
  |  Switch 2 |      |  Switch 3 |
  |          |      |          |
  +-----------+      +-----------+
           |              |
           |              |
           v              v
  +-----------+      +-----------+
  |          |      |          |
  |  Output 0 |      |  Output 1 |
  |          |      |          |
  +-----------+      +-----------+
           |              |
           |              |
           v              v
  +-----------+      +-----------+
  |          |      |          |
  |  Output 2 |      |  Output 3 |
  |          |      |          |
  +-----------+      +-----------+
```

Code Example (Arduino):
```c
const int switch0 = 2;
const int switch1 = 3;
const int switch2 = 4;
const int switch3 = 5;
const int output0 = 9;
const int output1 = 10;
const int output2 = 11;
const int output3 = 12;

void setup() {
  pinMode(switch0, INPUT);
  pinMode(switch1, INPUT);
  pinMode(switch2, INPUT);
  pinMode(switch3, INPUT);
  pinMode(output0, OUTPUT);
  pinMode(output1, OUTPUT);
  pinMode(output2, OUTPUT);
  pinMode(output3, OUTPUT);
}

void loop() {
  int inputState0 = digitalRead(switch0);
  int inputState1 = digitalRead(switch1);
  int inputState2 = digitalRead(switch2);
  int inputState3 = digitalRead(switch3);
  
  int outputState0 = !(inputState0 && !inputState1 && !inputState2 && !inputState3);
  int outputState1 = !(inputState0 && inputState1 && !inputState2 && !inputState3);
  int outputState2 = !(inputState0 && inputState1 && inputState2 && !inputState3);
  int outputState3 = !(inputState0 && inputState1 && inputState2 && inputState3);
  
  digitalWrite(output0, outputState0);
  digitalWrite(output1, outputState1);
  digitalWrite(output2, outputState2);
  digitalWrite(output3, outputState3);
}
```

Note: The above code examples are for illustrative purposes only and may require modifications to work with your specific circuit setup.

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Dual 4 Input NAND Gate IC - CD4012

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Code Examples