Encyclopedia Entry: 74AC11257DBRG4

Product Overview

Category

The 74AC11257DBRG4 belongs to the category of integrated circuits (ICs).

Use

This IC is commonly used in digital logic applications for data multiplexing and demultiplexing.

Characteristics

• The 74AC11257DBRG4 is a quad 2-input multiplexer/demultiplexer with three-state outputs.
• It operates on a supply voltage range of 2V to 6V, making it suitable for various electronic systems.
• This IC offers high-speed operation and low power consumption, making it efficient for digital signal processing.
• It has a wide operating temperature range, allowing it to function reliably in different environments.

Package

The 74AC11257DBRG4 is available in a small-outline integrated circuit (SOIC) package.

Essence

The essence of this IC lies in its ability to select one of four data inputs and route it to a single output line.

Packaging/Quantity

The 74AC11257DBRG4 is typically sold in reels containing a quantity of 250 units per reel.

Specifications

• Supply Voltage Range: 2V to 6V
• Logic Family: AC
• Number of Inputs: 8 (4 data inputs, 2 select inputs, 2 enable inputs)
• Number of Outputs: 1
• Output Type: Three-state
• Operating Temperature Range: -40°C to +85°C
• Propagation Delay Time: 5.5 ns (max)
• Input Capacitance: 3 pF (typ)

Detailed Pin Configuration

The pin configuration of the 74AC11257DBRG4 is as follows:

+---+--+---+ A0 |1 +--+ 16| VCC A1 |2 15| Y B0 |3 14| GND B1 |4 13| OE# S0 |5 12| B3 S1 |6 11| B2 E1 |7 10| B1 E2 |8 9| B0 +----------+

Functional Features

• Data Multiplexing: The IC can select one of the four data inputs (A0-A1, B0-B3) based on the select inputs (S0-S1) and route it to the output line (Y).
• Data Demultiplexing: It can also perform the reverse operation by selecting the input line (B0-B3) based on the select inputs (S0-S1) and driving it to the output line (Y).
• Three-State Outputs: The IC features three-state outputs, allowing the output line to be disconnected from the internal circuitry when not in use.

Advantages and Disadvantages

Advantages

• High-speed operation enables efficient data processing.
• Low power consumption contributes to energy efficiency.
• Wide operating temperature range ensures reliability in various environments.
• Small-outline package facilitates space-saving integration into electronic systems.

Disadvantages

• Limited number of inputs and outputs may restrict certain complex applications.
• Propagation delay time may affect real-time applications requiring immediate response.

Working Principles

The 74AC11257DBRG4 operates based on the principles of digital logic. It utilizes multiplexing and demultiplexing techniques to selectively route data between multiple inputs and a single output. The select inputs determine which input is connected to the output, while the enable inputs control the three-state outputs.

Detailed Application Field Plans

The 74AC11257DBRG4 finds applications in various digital systems, including but not limited to: - Data communication systems - Multiplexing and demultiplexing circuits - Address decoding in memory systems - Data routing in microprocessors - Signal switching in audio/video equipment

Detailed and Complete Alternative Models

Some alternative models that offer similar functionality to the 74AC11257DBRG4 include: - 74HC11257: A CMOS version with a wider supply voltage range. - CD4051: An analog multiplexer/demultiplexer IC. - SN74LS157: A TTL logic quad 2-line to 1-line data selector/multiplexer.

These alternatives can be considered based on specific requirements and compatibility with existing systems.

---

Word count: 550 words