Encyclopedia Entry: 74ACT843SC
Product Overview
Category
The 74ACT843SC belongs to the category of integrated circuits (ICs) and specifically falls under the family of digital logic devices.
Use
This product is primarily used in digital systems for various applications such as data processing, control systems, and communication devices. It serves as a key component in designing and implementing complex digital circuits.
Characteristics
- The 74ACT843SC is a high-speed octal bus transceiver with non-inverting 3-state outputs.
- It operates on a wide voltage range, typically between 2V and 6V, making it compatible with various digital systems.
- The device offers fast propagation delay times, enabling efficient data transfer within digital circuits.
- It features 8 bidirectional data lines, allowing for simultaneous transmission and reception of data.
Package and Quantity
The 74ACT843SC is available in a standard 20-pin small outline integrated circuit (SOIC) package. Each package contains one unit of the IC.
Specifications
- Supply Voltage Range: 2V to 6V
- Input/Output Voltage Range: 0V to VCC
- Maximum Operating Frequency: 100 MHz
- Output Drive Capability: ±24 mA
- Operating Temperature Range: -40°C to +85°C
Pin Configuration
The 74ACT843SC has a total of 20 pins, each serving a specific function. The pin configuration is as follows:
- A0: Data Input/Output Line 0
- A1: Data Input/Output Line 1
- A2: Data Input/Output Line 2
- A3: Data Input/Output Line 3
- A4: Data Input/Output Line 4
- A5: Data Input/Output Line 5
- A6: Data Input/Output Line 6
- A7: Data Input/Output Line 7
- GND: Ground
- OE*: Output Enable Input (Active Low)
- DIR: Direction Control Input
- VCC: Supply Voltage
- B7: Data Input/Output Line 7
- B6: Data Input/Output Line 6
- B5: Data Input/Output Line 5
- B4: Data Input/Output Line 4
- B3: Data Input/Output Line 3
- B2: Data Input/Output Line 2
- B1: Data Input/Output Line 1
- B0: Data Input/Output Line 0
Functional Features
- Bidirectional Data Transfer: The 74ACT843SC allows for simultaneous bidirectional data transfer between two digital systems.
- Non-Inverting Outputs: The device ensures that the output signals maintain the same logic level as the input signals, without any inversion.
- 3-State Outputs: The IC features 3-state outputs, enabling the control of bus contention in multi-master systems.
Advantages and Disadvantages
Advantages
- High-Speed Operation: The 74ACT843SC offers fast propagation delay times, facilitating efficient data transfer in digital circuits.
- Wide Voltage Range: The device operates on a wide voltage range, making it compatible with various digital systems.
- Bidirectional Capability: It supports bidirectional data transfer, allowing for versatile use in different applications.
Disadvantages
- Limited Output Drive Capability: The output drive capability of ±24 mA may not be sufficient for certain high-current applications.
- Temperature Sensitivity: The device's performance may be affected by extreme temperature conditions, requiring additional thermal management measures.
Working Principles
The 74ACT843SC functions as an octal bus transceiver by utilizing a combination of internal logic gates and flip-flops. It enables bidirectional data transfer between two digital systems by controlling the direction of data flow based on the DIR input signal. The OE* input signal is used to enable or disable the outputs, allowing for 3-state control.
Application Field Plans
The 74ACT843SC finds extensive use in various digital applications, including: - Microprocessor-based systems - Data communication devices - Control systems - Industrial automation - Embedded systems
Alternative Models
For those seeking alternative options, the following models can be considered: - 74ACT245: Octal Bus Transceiver with 3-State Outputs - 74HC643: Octal Bus Transceiver with Inverting Outputs - 74LS641: Octal Bus Transceiver with Non-Inverting Outputs
These alternatives offer similar functionality and can be suitable replacements depending on specific requirements.
In conclusion, the 74ACT843SC is a versatile integrated circuit used for bidirectional data transfer in digital systems. Its high-speed operation, wide voltage range, and non-inverting
技術ソリューションにおける 74ACT843SC の適用に関連する 10 件の一般的な質問と回答をリストします。
Sure! Here are 10 common questions and answers related to the application of 74ACT843SC in technical solutions:
Q: What is the purpose of the 74ACT843SC integrated circuit? A: The 74ACT843SC is a 9-bit transparent latch with 3-state outputs, commonly used for data storage and signal buffering.
Q: What is the maximum operating voltage for the 74ACT843SC? A: The 74ACT843SC has a maximum operating voltage of 5.5 volts.
Q: Can the 74ACT843SC be used as a level shifter? A: Yes, the 74ACT843SC can be used as a level shifter to convert signals between different voltage levels.
Q: How many inputs does the 74ACT843SC have? A: The 74ACT843SC has 9 input pins, labeled A0 to A8.
Q: What is the output current capability of the 74ACT843SC? A: The 74ACT843SC has a typical output current capability of 24 mA.
Q: Can the 74ACT843SC be cascaded to increase the number of bits stored? A: Yes, multiple 74ACT843SC ICs can be cascaded together to increase the number of bits stored.
Q: Does the 74ACT843SC have built-in protection against electrostatic discharge (ESD)? A: Yes, the 74ACT843SC is designed with ESD protection to prevent damage from static electricity.
Q: What is the propagation delay of the 74ACT843SC? A: The propagation delay of the 74ACT843SC is typically around 5 nanoseconds.
Q: Can the 74ACT843SC be used in high-speed applications? A: Yes, the 74ACT843SC is designed for high-speed operation and can be used in applications with fast data rates.
Q: What is the power supply voltage range for the 74ACT843SC? A: The 74ACT843SC operates within a power supply voltage range of 4.5 to 5.5 volts.
Please note that these answers are general and may vary depending on specific datasheet specifications and application requirements.