SN74HC251DR

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SN74HC251DR

IC MULTIPLEXER 1 X 8:1 16-SOIC

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Thông số kỹ thuật

Series 74HC
Part Status Active
Base Product Number 74HC251
Type Multiplexer
Circuit 1 x 8:1
Independent Circuits 1
Current - Output High, Low 7.8mA, 7.8mA
Voltage Supply Source Single Supply
Voltage - Supply 2V ~ 6V
Operating Temperature -40°C ~ 85°C
Mounting Type Surface Mount
Package / Case 16-SOIC (0.154", 3.90mm Width)
Supplier Device Package 16-SOIC

Tổng quan

Description

The SN74HC251DR is an octal multiplexer/demultiplexer designed for high-speed digital applications. It features 8 data inputs, a single output, and enables multiplexing of multiple data sources to a common output line. The device has a 3-state output, allowing it to drive multiple devices in a bus configuration.
Operating in a wide voltage range from 2V to 6V, the SN74HC251DR is compatible with various logic families and is suitable for both TTL and CMOS applications. It is housed in a 16-pin TSSOP package (DR), making it compact for space-constrained designs.
Key features include fast switching times (up to 5 ns), low power consumption, and the ability to control data flow with a select input. Overall, the SN74HC251DR is ideal for applications in data routing, signal multiplexing, and digital signal processing in consumer electronics, communication systems, and computer peripherals.

Features

The SN74HC251DR is an 8-channel multiplexer/demultiplexer that features:
1. Functionality: It can select data from one of eight inputs based on three select lines (A, B, and C) and route it to a single output.
2. Speed: It operates at high speeds, with a maximum propagation delay of 8 ns (typical) at 5V.
3. Voltage Range: The device operates within a supply voltage range of 2V to 6V, making it suitable for various logic levels.
4. Low Power Consumption: It has low power consumption compared to similar devices, making it efficient for battery-powered applications.
5. High Noise Immunity: Features high noise immunity with a typical VNIH/VNIL of 28% (min).
6. Output Drive: Capable of driving several standard logic inputs, with a high output drive capability.
7. Packaging: Available in a surface-mount SOIC (Small Outline Integrated Circuit) package (DR type), facilitating compact designs.
These features make the SN74HC251DR versatile for various digital applications in electronics.

Package

The SN74HC251DR is packaged in a 16-pin TSSOP (Thin Shrink Small Outline Package).

Pinout

The SN74HC251DR is a high-speed CMOS 8-bit multiplexer/demultiplexer with a pin count of 24. It is designed for data routing and can select one of several inputs to output based on control signals.
Pin Functions:
1. Data Inputs (D0-D7): 8 inputs for data selection.
2. Output (Y): 1 output that reflects the selected data input.
3. Select Inputs (S0-S2): 3 control pins used to select which data input is routed to the output.
4. Enable (G): Activates the device; when low, the output is disabled.
5. Common Ground (GND): Connects to the ground.
6. Power Supply (Vcc): Connects to the positive supply voltage.
The SN74HC251DR is suitable for applications requiring efficient data handling and signal routing, and operates within a wide voltage range.

Manufacturer

The SN74HC251DR is manufactured by Texas Instruments (TI), a well-known American technology company. Texas Instruments specializes in designing and producing semiconductors, integrated circuits, and various electronic components. Founded in 1930, TI has a strong focus on analog and embedded processing technologies, serving a wide range of industries including automotive, industrial, communications, and consumer electronics. The SN74HC251DR is a multiplexer/demultiplexer IC that is part of the 74HC (High-Speed CMOS) series, known for its high-speed operation and low power consumption.

Application

The SN74HC251DR is an 8-channel multiplexer (MUX) that can be used in various applications, including data routing, signal selection, and communication systems. It is commonly utilized in digital circuit designs for functions like data switching, multiplexing signals in microcontroller projects, and enabling multiple input sources for a single output. Additionally, it can be used in audio and video signal processing, as well as in automated test equipment for efficient data management.

Equivalent

The SN74HC251DR is an 8-channel multiplexer/demultiplexer. Equivalent products include:
1. 74HC251 (without the "D" for surface mount)
2. MC74HC251 (Microchip variant)
3. CD74HC251 (from Texas Instruments)
4. 74HC157 (dual 4-input multiplexer)
Always check the datasheets for specific features and pin compatibility.

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