The MC74HC257DR2 is a Quad 2-Input Multiplexer with 3-State Outputs, manufactured by Freescale Semiconductor (now NXP Semiconductors). This device selects one of two 4-bit data sources and outputs the selected data. The 3-state outputs allow the device to be connected to a bus without loading the bus when the output is disabled.

Applications

• Data selection and routing
• Memory addressing
• Logic function implementation
• Bus multiplexing
• Address decoding

Features

• Quad 2-input multiplexer
• 3-state outputs
• High speed operation
• Low power consumption
• Wide operating voltage range (2V to 6V)
• TTL compatible inputs

Benefits

• Versatile data selection capability
• Allows multiple devices to share a common bus
• Fast switching speeds for high-performance systems
• Low power consumption for battery-powered applications
• Easy to interface with TTL logic

Additional Details

The MC74HC257DR2 is part of the HC (High-speed CMOS) logic family, known for its combination of speed and low power consumption. The 'DR2' suffix typically indicates a specific package type (e.g., SOIC) and tape-and-reel packaging. Refer to the NXP datasheet for detailed specifications, including propagation delays, output drive current, and operating temperature range. This multiplexer is a standard building block in digital logic circuits.