SN74HC251DG4

Product Overview

• Category: Integrated Circuit (IC)
• Use: Data Selector/Multiplexer
• Characteristics: High-speed, low-power, 8-input multiplexer
• Package: SOIC (Small Outline Integrated Circuit)
• Essence: The SN74HC251DG4 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 tape and reel packaging with 2500 units per reel.

Specifications

• Supply Voltage: 2V to 6V
• Input Voltage: 0V to VCC
• Output Voltage: 0V to VCC
• Operating Temperature Range: -40°C to +85°C
• Propagation Delay: 9 ns (typical)
• Input Capacitance: 3.5 pF (typical)
• Output Current: ±6 mA

Pin Configuration

The SN74HC251DG4 has a total of 16 pins arranged as follows:

+---+--+---+ A0 --|1 +--+ 16|-- VCC A1 --|2 15|-- B A2 --|3 14|-- C A3 --|4 13|-- D A4 --|5 74HC 12|-- E A5 --|6 251D 11|-- F A6 --|7 G4 10|-- GND A7 --|8 9 |-- Y +----------+

Functional Features

• 8-input multiplexer with common select inputs (A0-A7)
• Single output (Y) for selected input
• Low power consumption
• High-speed operation
• Wide operating voltage range

Advantages and Disadvantages

Advantages

• Allows selection of one out of eight data inputs
• Compact SOIC package for space-saving designs
• Wide operating temperature range for versatile applications
• Low propagation delay for high-speed data processing

Disadvantages

• Limited to 8-input multiplexing, may not be suitable for larger-scale applications
• Requires external control signals (A0-A7) for input selection

Working Principles

The SN74HC251DG4 is a digital multiplexer that uses the select inputs (A0-A7) to choose one of the eight data inputs (B-G) to be routed to the output pin (Y). The selected input is determined by the binary value applied to the select inputs. The IC operates on a supply voltage ranging from 2V to 6V and provides a low propagation delay of 9 ns.

Detailed Application Field Plans

The SN74HC251DG4 can be used in various applications, including:

1. Data routing and selection in microcontrollers and digital systems.
2. Address decoding in memory systems.
3. Input selection in communication systems.
4. Multiplexing of control signals in industrial automation.
5. Signal routing in test and measurement equipment.

Detailed and Complete Alternative Models

Some alternative models to the SN74HC251DG4 include:

1. CD4051B: 8-channel analog multiplexer/demultiplexer IC.
2. 74HC151: 8-input multiplexer with inverted outputs.
3. MC14051B: 8-channel analog multiplexer/demultiplexer with latch.

These alternative models offer similar functionality but may have different specifications or package options.

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