4047BDC

Overview

The CD4047BDC is a monostable/astable multivibrator from the 4000/14000/40000 series, manufactured by National Semiconductor (TI). It operates in either monostable or astable modes using external resistors and capacitors. The device features low power consumption, high noise immunity, and TTL compatibility with a fan-out of 2 for 74L or 1 for 74LS. It provides true and complemented buffered outputs. Key specifications include a supply voltage range of 3.0V to 15V, an operating temperature range of -55°C to 125°C, and a load capacitance of 50 pF. The component is housed in a DFP-14 ceramic flatpack package.

Feature Summary

• Supports retriggerable monostable and free-running/gatable astable operating modes
• Provides true and complemented buffered outputs
• Features low power CMOS oscillator configuration
• Offers high noise immunity compatible with standard logic families

Applications

• Timing circuits
• Time-delay applications
• Frequency discriminators
• Envelope detection
• Frequency multiplication and division

Procurement Notes

Verify the specific suffix 'DC' against official National Semiconductor/TI documentation to confirm the exact package type and material composition, as datasheets may list variations such as plastic or ceramic packages. Ensure the component meets required environmental standards and check for lead-free compliance status if applicable to your manufacturing process. Confirm pinout compatibility with existing designs before procurement.

Selection Notes

Select this component when a reliable monostable or astable multivibrator with wide supply voltage flexibility is required. Its ability to operate across a broad temperature range makes it suitable for industrial environments. Consider the external RC component requirements for timing precision and ensure the package style matches your PCB assembly capabilities. Verify that the output drive capability meets the load requirements of downstream circuitry.

Part Context

The CD4047 belongs to the widely used 4000-series CMOS logic family, known for its versatility in timing and frequency generation applications. Manufactured by National Semiconductor, now part of Texas Instruments, this component represents a standard solution for general-purpose multivibrator functions. It is often chosen for its balance of performance, power efficiency, and ease of integration into various electronic systems requiring precise timing control.

Replacement Considerations

Compatible substitutes include the CD4047BC and CD4047BM from Fairchild Semiconductor, which share identical logical functionality and pinouts. Other equivalents within the 4000-series family may be considered if package and electrical specifications align. Always verify pin compatibility and operating conditions before substituting.