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MM74HC251N from NS,National Semiconductor

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MM74HC251N

Manufacturer: NS, FAI, FAIRCHILD

8-Channel 3-STATE Multiplexer

Partnumber Manufacturer Quantity Availability
MM74HC251N NS, FAI, FAIRCHILD 72 In Stock

Description and Introduction

8-Channel 3-STATE Multiplexer **Enhance Your Digital Systems with the MM74HC251N Multiplexer**  

In the realm of digital electronics, efficient data selection and signal routing are critical for optimizing system performance. The **MM74HC251N** stands out as a high-speed, low-power 8-input multiplexer designed to streamline data management in complex circuits. Built with advanced CMOS technology, this component ensures reliable operation while minimizing power consumption—making it an ideal choice for modern embedded systems, communication devices, and industrial automation applications.  

The MM74HC251N features **eight data inputs**, a **three-bit select input**, and an **active-low enable pin**, providing precise control over signal routing. Its high-speed operation, with typical propagation delays of just **14 ns**, ensures seamless integration into high-frequency designs. Additionally, the inclusion of **complementary outputs (Y and W)** allows for flexible logic-level conversion, enhancing compatibility with a wide range of digital systems.  

One of the key advantages of the MM74HC251N is its **wide operating voltage range (2V to 6V)**, which accommodates both TTL and CMOS logic levels. This versatility simplifies interfacing with mixed-voltage circuits, reducing the need for additional level-shifting components. The device also incorporates **Schmitt-trigger inputs**, improving noise immunity and ensuring stable performance in electrically noisy environments.  

Engineers and designers will appreciate the **MM74HC251N’s robust construction** and industry-standard DIP packaging, which facilitates easy prototyping and integration into existing designs. Whether used in data acquisition systems, signal processing, or microcontroller-based projects, this multiplexer delivers consistent performance with minimal power dissipation.  

For applications demanding precision, speed, and reliability, the **MM74HC251N** remains a trusted solution for efficient data selection and signal routing. Its combination of high-speed operation, low power consumption, and broad compatibility makes it an essential component for next-generation digital systems.

Application Scenarios & Design Considerations

8-Channel 3-STATE Multiplexer

Alternative Part Number

  • SN74HC251N --: Same 8-input multiplexer function with 3-state outputs in a standard DIP-16 package, pin-compatible with the original.
  • CD74HC251E --: Harris/TI 74HC251 series equivalent with identical logic function and DIP-16 pinout, widely available.
  • MC74HC251N --: Motorola/ON 74HC251 multiplexer in DIP-16, same function and pinout, suitable drop-in replacement.

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