The onsemi CD4047BCM is a versatile integrated circuit (IC) that functions as a monostable and astable multivibrator. It is part of the CD4000 series of CMOS logic ICs, which are known for their low power consumption and high noise immunity. The CD4047BCM is widely used in various applications, including timer circuits, pulse generators, and frequency dividers.

## Key Features

1. Dual Functionality: The CD4047BCM can operate in two modes:
- Astable Mode: In this mode, the IC generates a continuous square wave output. The frequency and duty cycle can be adjusted using external resistors and capacitors.
- Monostable Mode: In this mode, the IC produces a single output pulse in response to a trigger input. The duration of the pulse can be controlled by external components.

2. Wide Supply Voltage Range: The CD4047BCM operates over a wide supply voltage range from 3V to 15V, making it suitable for various applications.

3. Low Power Consumption: The CMOS technology used in the CD4047BCM allows for low power operation, which is beneficial in battery-powered applications.

4. High Noise Immunity: The IC is designed to be resistant to noise, ensuring reliable operation in various environments.

5. Output Drive Capability: The CD4047BCM can drive loads directly, making it suitable for interfacing with other digital circuits or driving LEDs.

## Specifications

Here are the detailed specifications of the CD4047BCM:

- Supply Voltage (V_DD): 3V to 15V
- Input Voltage (V_IN): 0V to V_DD
- Output Voltage (V_OUT): Close to V_DD for high state, close to 0V for low state
- Maximum Output Current: 10 mA (source or sink)
- Frequency Range:
- Astable mode: Typically from a few Hz to several kHz, depending on external components.
- Monostable mode: Pulse width can be adjusted from microseconds to seconds.
- Temperature Range: -55°C to +125°C (industrial grade)
- Propagation Delay: Typically around 100 ns
- Power Dissipation: Typically 1 mW at V_DD = 5V

## Pin Configuration

The CD4047BCM typically comes in a 14-pin dual in-line package (DIP). The pin configuration is as follows:

1. Pin 1: Output (Q)
2. Pin 2: Trigger (for monostable mode)
3. Pin 3: Threshold (for monostable mode)
4. Pin 4: Control Voltage (for frequency modulation)
5. Pin 5: Discharge (for monostable mode)
6. Pin 6: Timing Capacitor Connection
7. Pin 7: Timing Resistor Connection
8. Pin 8: Ground (GND)
9. Pin 9: Timing Resistor Connection (for astable mode)
10. Pin 10: Timing Capacitor Connection (for astable mode)
11. Pin 11: Output (Q')
12. Pin 12: Reset (active low)
13. Pin 13: V_DD (Supply Voltage)
14. Pin 14: Not Connected (NC)

## Applications

The CD4047BCM is used in a variety of applications, including:

- Timer Circuits: For generating precise time delays.
- Frequency Generators: For producing clock signals in digital circuits.
- Pulse Width Modulation (PWM): For controlling motor speeds or light dimming.
- Tone Generators: In audio applications for generating sound signals.
- Flashing LED Circuits: For decorative lighting or indicators.

## Conclusion

The onsemi CD4047BCM is a highly flexible and reliable IC that serves as a monostable and astable multivibrator. Its wide supply voltage range, low power consumption, and ease of use make it a popular choice for engineers and hobbyists alike. Whether used in simple timer applications or more complex frequency generation tasks, the CD4047BCM provides a robust solution for various electronic projects.