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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.
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Noem 10 veelgestelde vragen en antwoorden met betrekking tot de toepassing van 74AC11257DBRG4 in technische oplossingen
Sure! Here are 10 common questions and answers related to the application of 74AC11257DBRG4 in technical solutions:
Q: What is the 74AC11257DBRG4? A: The 74AC11257DBRG4 is a quad 2-input multiplexer with 3-state outputs, commonly used in digital logic circuits.
Q: What is the purpose of a multiplexer? A: A multiplexer is used to select one of several input signals and route it to a single output line based on control inputs.
Q: How many inputs does the 74AC11257DBRG4 have? A: The 74AC11257DBRG4 has four sets of two inputs each, totaling eight input lines.
Q: Can the 74AC11257DBRG4 handle both analog and digital signals? A: No, the 74AC11257DBRG4 is designed to handle only digital signals.
Q: What is the voltage range supported by the 74AC11257DBRG4? A: The 74AC11257DBRG4 operates with a voltage range of 2V to 6V.
Q: How many output lines does the 74AC11257DBRG4 have? A: The 74AC11257DBRG4 has four output lines.
Q: Can the outputs of the 74AC11257DBRG4 be put into a high-impedance state? A: Yes, the 74AC11257DBRG4 has 3-state outputs that can be put into a high-impedance state when not actively driving a signal.
Q: What is the maximum operating frequency of the 74AC11257DBRG4? A: The maximum operating frequency of the 74AC11257DBRG4 is typically around 200 MHz.
Q: Can the 74AC11257DBRG4 be cascaded to increase the number of inputs? A: Yes, multiple 74AC11257DBRG4 chips can be cascaded together to increase the number of inputs and outputs.
Q: What are some common applications of the 74AC11257DBRG4? A: The 74AC11257DBRG4 is commonly used in data routing, signal selection, bus switching, and multiplexing applications in digital systems.
Please note that the answers provided here are general and may vary depending on specific datasheet specifications and application requirements.