The 74AC251 is an 8-input multiplexer with 3-STATE outputs. This device selects one of eight data sources based on the binary address applied to the select inputs (S0, S1, S2). The selected data is then presented at the output (Y), providing a versatile solution for data routing and selection in digital systems. The 3-STATE output enables the device to be used in bus-oriented applications.

Applications

• Data selection and routing
• Parallel-to-serial conversion
• Logic function generation
• Memory addressing
• Digital multiplexing

Features

• 8-Input Multiplexer
• 3-STATE output
• High speed: tpd = 6.5 ns (typ) at VCC = 5V
• Low power dissipation: ICC = 8 μA (max)
• Select inputs (S0, S1, S2)
• Enable input (E)
• Fanout: 15 FAST ICs
• Operating voltage range: 2V to 6V

Benefits

• Provides a flexible way to select from multiple data sources.
• Enables efficient data routing in digital systems.
• Reduces chip count by combining multiple logic functions into a single device.
• Allows for easy interfacing with bus-oriented systems.
• Contributes to energy efficiency with its low power consumption.

The 74AC251 is available in various packages, including DIP and SOIC. The device is controlled by three select inputs and an enable input. When the enable input is high, the output is disabled (high impedance state). When the enable input is low, the output reflects the selected input data. The 74AC251 is suitable for a wide range of applications requiring data selection and multiplexing.