The 74HC298 is a high-speed CMOS Quad 2-Input Multiplexer manufactured by Hitachi. This device features four 2-input multiplexers in a single package, allowing selection of one of two data sources for each of the four outputs. It is part of the 74HC family, known for its high speed, low power consumption, and wide operating voltage range, making it suitable for various digital logic applications.

Applications

• Data selection and routing
• Address multiplexing in memory systems
• Logic function generation
• Instrument and control systems
• Signal selection in communication equipment

Features

• Quad 2-input multiplexers
• High speed: tpd = 12 ns (typical) at VCC = 5V
• Low power dissipation: ICC = 4 μA (maximum) at TA = 25°C
• Wide operating voltage range: 2V to 6V
• TTL compatible input thresholds
• Output drive capability: 10 LSTTL loads

Benefits

• Versatile Data Selection: Allows selection between two data sources for each of the four outputs, offering flexibility in data routing and manipulation.
• High-Speed Operation: The fast propagation delay ensures minimal signal delay, contributing to overall system speed and responsiveness.
• Low Power Consumption: The CMOS technology provides significant power savings, making it ideal for battery-powered and energy-efficient applications.
• Wide Operating Voltage Range: Can operate over a broad voltage range, offering design flexibility and compatibility with various logic families.
• TTL Compatibility: TTL compatible input thresholds make it easy to interface with TTL logic devices.

Additional Details

The 74HC298 consists of four independent 2-input multiplexers. Each multiplexer has two data inputs (I0 and I1), a select input (S), and an output (Y). The select input determines which data input is routed to the output. When S is low, I0 is selected; when S is high, I1 is selected. The device operates over a temperature range of -40°C to +85°C. It is commonly available in DIP (Dual In-line Package) and SOIC (Small Outline Integrated Circuit) packages.

The 74HC298 simplifies circuit design by providing multiple multiplexing functions in a single package. Its low power consumption and high speed make it a preferred choice for modern digital systems. It's used extensively in various electronic applications, from simple data selection to complex logic function implementations.