Product Overview
National Semiconductor CD4047BCN CMOS Multivibrator 14-Pin DIP
Condition
Used equipment pull. Evaluation: Visual inspection only. Function testing not performed. Markings legible: National Semiconductor logo, P9452SG, CD4047BCN. 14-pin dual in-line package with straight through-hole leads.
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Product Overview
The National Semiconductor CD4047BCN is a CMOS low-power monostable and astable multivibrator housed in a standard 14-pin DIP package. Designed for timing, frequency division, and pulse-forming circuitry, it operates across a wide 3V to 15V supply range. Using an external resistor and capacitor network, it delivers accurate pulse widths in monostable mode or a true 50% duty cycle square wave in astable mode, complete with buffered true (Q), inverted (Q-bar), and oscillator outputs.
Key Features
- Dual operating modes: astable (free-running oscillator) or monostable (one-shot pulse generator)
- True 50% duty cycle output in astable mode via internal flip-flop divider
- Retriggerable and non-retriggerable gating options in monostable operation
- Wide operating voltage range from 3V to 15V
- Buffered complementary outputs (Q and Q-bar) plus dedicated oscillator output
- Standard 14-pin dual in-line package (DIP-14) suitable for breadboards, sockets, or through-hole soldering
Applications
- Replacing failed timing and clock generation ICs during board-level repair of legacy industrial controls and test instruments
- Generating stable square waves and complementary clock pulses in DIY analog synthesizer modules and custom audio circuits
- Building delay timers, pulse stretchers, and frequency dividers on prototyping breadboards
Frequently Asked Questions
What operating modes does the CD4047BCN provide?
It supports both astable operation (generating a 50% duty cycle square wave alongside an oscillator output) and monostable operation (producing single-pulse outputs with retriggerable or non-retriggerable triggering options).
How is output timing determined?
Timing in both astable and monostable modes is controlled by a single external resistor and capacitor network connected to the timing pins.
Why buy a single pulled unit rather than a large multipack?
When completing a specific bench repair or one-off build, purchasing an individual original-brand chip avoids the waste and cost of surplus bulk packs. This specific unit is photographed and priced as an individual piece. Orders ship for an $8 flat rate, free on orders over $28, and leave our Idaho warehouse the same or next business day.
Drop this classic 4000-series multivibrator onto your breadboard, dial in your timing network, and get your clock pulses running cleanly.
