The CD4556 is a CMOS dual one-of-four decoder/demultiplexer from Intersil (now Renesas). It's a versatile logic device used to select one of four outputs based on a two-bit binary input. It is commonly used in digital systems for address decoding, data routing, and control applications.

Applications

• Memory address decoding
• Data routing
• Multiplexing/demultiplexing
• Display drivers
• Logic level conversion

Features

• Dual one-of-four decoder/demultiplexer
• CMOS logic for low power consumption
• Wide supply voltage range
• High noise immunity
• TTL compatibility

Benefits

• Simplifies address decoding and data routing
• Reduces power consumption in digital circuits
• Provides reliable operation in noisy environments
• Interfaces easily with TTL logic circuits
• Offers flexibility in system design

Additional Details

The CD4556 operates from a wide supply voltage range, typically 3V to 15V, making it suitable for various digital systems. Its CMOS design ensures low power consumption, making it ideal for battery-powered applications. The device features high noise immunity, which provides reliable operation in noisy environments. The enable input allows for cascading multiple decoders to create larger decoding structures. When the enable input is high, all outputs are forced to the inactive state.