Product Overview: 74HCT147 10-to-4 Line Priority Encoder

The 74HCT147 from NXP is a high-speed Si-gate CMOS device that is designed to provide a priority encoding function to digital systems. This integrated circuit is part of the 74HCT family, which is compatible with TTL levels and known for its robust performance and low power consumption. The 74HCT147 is specifically a 10-to-4 line priority encoder that has a wide range of applications in digital data processing and signal encoding.

Key Features

• Priority Encoding: The 74HCT147 provides priority encoding of the inputs to ensure that only the highest-order data line is encoded. This means that if multiple inputs are active simultaneously, the output will represent the highest priority input.
• Input Levels: The device features 10 active LOW inputs and is capable of handling standard TTL input levels, making it versatile for interfacing with various digital components.
• Output Levels: It produces a 4-bit binary code corresponding to the active input, which is also compatible with TTL output levels.
• Multiple Package Options: Available in a variety of packages, including DIP, SO, and SSOP, the 74HCT147 can be integrated into a wide range of electronic assemblies.
• Low Power Consumption: As a CMOS device, it has a low power dissipation, which is crucial for power-sensitive applications.

Applications

The 74HCT147 is ideal for use in systems that require data routing and encoding. Common applications include:

• Keyboard encoding
• Control systems for selecting the highest priority interrupt
• Data multiplexing
• Address decoding in memory control units

Technical Specifications

The technical specifications of the 74HCT147 ensure its reliability and efficiency in a variety of digital applications:

• Logic Family: HCT
• Logic Type: CMOS
• Supply Voltage: Typically 5V
• Operating Temperature: -40°C to +125°C
• Propagation Delay: Typically 18ns

Overall, the NXP 74HCT147 is a highly reliable priority encoder that offers a seamless integration into digital systems requiring a straightforward encoding solution. Its compatibility with TTL levels and low power consumption make it a preferred choice for designers and engineers in the electronics industry.