SN74HC251PWR

Product Overview

• Category: Integrated Circuit
• Use: Data Selector/Multiplexer
• Characteristics: High-Speed, Low-Power, 8-Channel, Single Multiplexer
• Package: TSSOP (Thin Shrink Small Outline Package)
• Essence: The SN74HC251PWR is a multiplexer IC that allows the selection of one out of eight data inputs to be routed to a single output.
• Packaging/Quantity: Available in reels of 2500 pieces

Specifications

• Supply Voltage: 2V to 6V
• Logic Family: HC
• Number of Channels: 8
• Input Compatibility: TTL, CMOS
• Propagation Delay: 9 ns (typical)
• Operating Temperature Range: -40°C to +85°C
• Output Current: ±6 mA
• Input Capacitance: 3.5 pF (typical)

Pin Configuration

The SN74HC251PWR has a total of 16 pins arranged as follows:

___________ A0 --| |-- VCC A1 --| |-- A2 A3 --| |-- A4 A5 --| |-- A6 A7 --| |-- GND Y/Z --| |-- E G1 --| |-- G2 G3 --| |-- Y/Z GND --|___________|-- NC

Functional Features

• 8-channel data selector/multiplexer with single output
• Selects one input from eight using address inputs A0-A7
• Enable input (E) for controlling the output state
• Three additional enable inputs (G1, G2, G3) for further control flexibility
• High-speed operation with low power consumption
• Compatible with both TTL and CMOS logic levels

Advantages and Disadvantages

Advantages: - Versatile multiplexer IC suitable for various applications - Wide operating voltage range allows compatibility with different systems - Low propagation delay ensures fast data switching - Compact TSSOP package saves board space - Can be used in both TTL and CMOS environments

Disadvantages: - Limited to 8 input channels, may not be suitable for applications requiring more inputs - Not suitable for high-frequency applications due to limited bandwidth

Working Principles

The SN74HC251PWR is a digital multiplexer that selects one of the eight data inputs based on the address inputs (A0-A7). The selected input is then routed to the output pin (Y/Z). The enable input (E) controls the output state, while the additional enable inputs (G1, G2, G3) provide further control flexibility.

Detailed Application Field Plans

The SN74HC251PWR can be used in various applications, including but not limited to: - Data routing and selection in microcontrollers and digital systems - Address decoding in memory systems - Input selection in audio/video equipment - Channel selection in communication systems - Multiplexing in test and measurement instruments

Alternative Models

Some alternative models that offer similar functionality to the SN74HC251PWR include: - CD4051B: 8-channel analog multiplexer/demultiplexer - 74HC151: 8-input multiplexer with inverted outputs - SN74LS157: Quad 2-line to 1-line data selectors/multiplexers - CD74HC238: 3-to-8 line decoder/demultiplexer with address latches

These alternative models can be considered based on specific requirements and compatibility with the existing system.

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