Xem thông số kỹ thuật để biết chi tiết sản phẩm.
SN74ALS257AN
Product Overview
- Category: Integrated Circuit (IC)
- Use: Data Multiplexer
- Characteristics: High-speed, TTL-compatible, quad 2-line to 1-line data selector/multiplexer
- Package: DIP-16 (Dual In-Line Package with 16 pins)
- Essence: SN74ALS257AN is a versatile IC that allows the selection and multiplexing of data signals in electronic circuits.
- Packaging/Quantity: Available in tubes or reels, typically sold in quantities of 25 or more.
Specifications
- Supply Voltage Range: 4.5V to 5.5V
- Input Voltage Range: 0V to VCC
- Output Voltage Range: 0V to VCC
- Operating Temperature Range: -40°C to +85°C
- Propagation Delay Time: 9ns (typical)
- Maximum Operating Frequency: 100MHz
Detailed Pin Configuration
The SN74ALS257AN has 16 pins arranged as follows:
__ __
A1 |1 \__/ 16| VCC
B1 |2 15| Y1
A2 |3 14| B2
B2 |4 13| A3
Y2 |5 SN 12| B3
GND |6 74 11| Y3
Y4 |7 ALS 10| A4
B4 |8 9| B4
-- --
Functional Features
- Quad 2-line to 1-line data selector/multiplexer
- TTL-compatible inputs and outputs
- Low power consumption
- High-speed operation
- Wide operating voltage range
- Schottky-clamped inputs for improved noise immunity
Advantages and Disadvantages
Advantages: - Versatile data multiplexing capabilities - High-speed operation allows for efficient data processing - Wide operating voltage range enables compatibility with various systems - Schottky-clamped inputs provide improved noise immunity
Disadvantages: - Limited to 2-line to 1-line data selection/multiplexing - DIP-16 package may require additional space on the circuit board
Working Principles
The SN74ALS257AN operates by selecting one of the four input lines (A1-A4, B1-B4) based on the control inputs. The selected input is then routed to the output line (Y1-Y4). The IC uses TTL-compatible logic levels and provides fast switching times.
Detailed Application Field Plans
The SN74ALS257AN can be used in various applications, including but not limited to: - Data routing and selection in microprocessors and digital systems - Address decoding in memory systems - Multiplexing of data signals in communication systems - Input/output expansion in embedded systems
Detailed and Complete Alternative Models
Some alternative models that offer similar functionality to SN74ALS257AN are: - CD74HC257E: Quad 2-line to 1-line data selector/multiplexer with CMOS logic levels - MC74ACT257N: Quad 2-line to 1-line data selector/multiplexer with advanced CMOS technology - SN54LS257AJ: Quad 2-line to 1-line data selector/multiplexer with Schottky-clamped inputs
These alternatives can be considered based on specific requirements such as logic level compatibility, power consumption, or temperature range.
Word count: 399 words
Liệt kê 10 câu hỏi và câu trả lời thường gặp liên quan đến ứng dụng SN74ALS257AN trong giải pháp kỹ thuật
Sure! Here are 10 common questions and answers related to the application of SN74ALS257AN:
Q: What is SN74ALS257AN? A: SN74ALS257AN is a quad 2-input multiplexer with tri-state outputs, commonly used in digital logic circuits.
Q: What is the purpose of SN74ALS257AN? A: SN74ALS257AN is used to select one of four data inputs and route it to a single output based on the control inputs.
Q: What is the operating voltage range for SN74ALS257AN? A: The operating voltage range for SN74ALS257AN is typically between 4.5V and 5.5V.
Q: How many control inputs does SN74ALS257AN have? A: SN74ALS257AN has two control inputs, which determine the selection of the data inputs.
Q: What is the maximum frequency at which SN74ALS257AN can operate? A: SN74ALS257AN can typically operate at frequencies up to 25 MHz.
Q: Can SN74ALS257AN handle both TTL and CMOS input levels? A: Yes, SN74ALS257AN is compatible with both TTL and CMOS input levels.
Q: What is the output drive capability of SN74ALS257AN? A: SN74ALS257AN has a typical output drive capability of ±24 mA.
Q: Can SN74ALS257AN be used in high-speed data switching applications? A: Yes, SN74ALS257AN is suitable for high-speed data switching applications due to its fast propagation delay.
Q: Does SN74ALS257AN have internal pull-up or pull-down resistors? A: No, SN74ALS257AN does not have internal pull-up or pull-down resistors.
Q: What is the package type for SN74ALS257AN? A: SN74ALS257AN is available in a 16-pin DIP (Dual In-line Package) format.
Please note that these answers are general and may vary depending on the specific datasheet and manufacturer's specifications for SN74ALS257AN.