74HC251 74251 Signal Switches, Multiplexers, Decoder IC PDIP-16

74HC251 74251 Signal Switches, Multiplexers, Decoder IC PDIP-16

The 74HC251 is a high-speed CMOS integrated circuit that functions as an 8-input digital multiplexer. Its primary role is to select one of eight binary data inputs and route it to a single output channel. This data selection is controlled by a 3-bit binary address, making it a fundamental building block for managing multiple data streams in digital systems, effectively acting as a digitally-controlled signal switch.

A key feature of this IC is its provision of both true (Y) and complemented (W) data outputs, offering immediate logic-level flexibility for the selected signal. Furthermore, the outputs are three-state, meaning they can be put into a high-impedance (high-Z) mode. This is controlled by a dedicated Output Enable pin; when this pin is inactive, both outputs disconnect from the internal circuit, allowing multiple devices to be connected to a shared bus without interference.

Fabricated with advanced silicon-gate CMOS technology, the 74HC251 offers the high noise immunity and low power consumption typical of CMOS devices, while achieving speeds comparable to LSTTL logic. It operates over a wide supply voltage range and is designed to interface directly with other CMOS series, as well as NMOS and TTL components, providing versatility in mixed-logic system design.

Features:

• High-Speed CMOS 8-Channel Digital Multiplexer.
• Three-State Outputs for Bus-Oriented Applications.
• Both True and Complementary Outputs Provided.
• Low Power Consumption.
• High Noise Immunity.
• Fanout (Over Temperature Range):
  • Standard Outputs: 10 LSTTL Loads.
  • Bus Driver Outputs: 15 LSTTL Loads.
• Wide Operating Voltage Range: 2.0V to 6.0V.
• Outputs Directly Interface to CMOS, NMOS, and TTL.

Specifications:

Applications:

• Data Routing and Selection.
• Parallel-to-Serial Conversion.
• Function Generation.
• Bus-organized System Switching.

Package Contents:

• 1x 74HC251 74251 Signal Switches, Multiplexers, Decoder IC PDIP-16

Datasheet