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PCA9549D,118
Product Overview
Category
The PCA9549D,118 is a multiplexer/demultiplexer belonging to the category of integrated circuits.
Use
It is used for I2C bus expansion and isolation in various applications.
Characteristics
- Allows multiple I2C devices to be connected to a single I2C bus
- Provides bidirectional voltage-level translation
- Low RDS(on) switches for minimal signal distortion
- Supports hot insertion
- Available in TSSOP24 package
Package
The PCA9549D,118 comes in a TSSOP24 package.
Essence
The essence of PCA9549D,118 lies in its ability to expand and isolate I2C bus connections, providing flexibility and efficiency in system design.
Packaging/Quantity
The PCA9549D,118 is typically available in reels with a quantity of 2500 units per reel.
Specifications
- Operating Voltage: 1.65V to 5.5V
- Number of Channels: 8
- I2C Bus Frequency: Up to 400kHz
- On-Resistance: 3Ω (typical)
Detailed Pin Configuration
The PCA9549D,118 features a TSSOP24 pin configuration with detailed pin functions as follows: 1. SCL1: I2C-bus clock for channel 1 2. SDA1: I2C-bus data for channel 1 3. EN: Enable input 4. SCL2: I2C-bus clock for channel 2 5. SDA2: I2C-bus data for channel 2 6. SCL3: I2C-bus clock for channel 3 7. SDA3: I2C-bus data for channel 3 8. GND: Ground 9. SCL4: I2C-bus clock for channel 4 10. SDA4: I2C-bus data for channel 4 11. SCL5: I2C-bus clock for channel 5 12. SDA5: I2C-bus data for channel 5 13. SCL6: I2C-bus clock for channel 6 14. SDA6: I2C-bus data for channel 6 15. SCL7: I2C-bus clock for channel 7 16. SDA7: I2C-bus data for channel 7 17. SCL8: I2C-bus clock for channel 8 18. SDA8: I2C-bus data for channel 8 19. VCC: Supply voltage 20. NC: No connect 21. A0: Address input 22. A1: Address input 23. A2: Address input 24. GND: Ground
Functional Features
The PCA9549D,118 offers the following functional features: - Channel selection through I2C-bus, allowing communication with a specific I2C device - Bidirectional voltage-level translation to accommodate different voltage domains - Hot insertion capability for seamless integration into existing systems
Advantages and Disadvantages
Advantages
- Simplifies I2C bus management in complex systems
- Enables efficient use of I2C peripherals
- Provides voltage-level translation for mixed-voltage systems
Disadvantages
- Requires careful consideration of address conflicts when multiple multiplexers are used in the same system
- Additional power consumption due to the need for an enable signal
Working Principles
The PCA9549D,118 operates by selectively connecting one of the eight channels to the common I2C bus, allowing communication with a specific I2C device. The enable input controls the operation of the multiplexer, enabling or disabling the channel selection functionality.
Detailed Application Field Plans
The PCA9549D,118 finds application in various fields, including: - Industrial automation - Consumer electronics - Automotive systems - Medical devices - Communication equipment
Detailed and Complete Alternative Models
Some alternative models to the PCA9549D,118 include: - PCA9548A - TCA9548A - TS5A3159A
In summary, the PCA9549D,118 is a versatile multiplexer/demultiplexer that facilitates I2C bus expansion and isolation, offering a range of functional features and characteristics suitable for diverse applications.
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10 domande e risposte comuni relative all'applicazione di PCA9549D,118 nelle soluzioni tecniche
What is PCA9549D,118?
- PCA9549D,118 is an I2C-bus controlled 8-channel I2C multiplexer.
What are the key features of PCA9549D,118?
- The key features include 8 channels, I2C-bus interface, and a low RDS(on) switch.
How does PCA9549D,118 help in technical solutions?
- PCA9549D,118 helps in expanding the number of I2C devices that can be connected to a microcontroller or other I2C master device.
What is the maximum voltage supported by PCA9549D,118?
- PCA9549D,118 supports a maximum voltage of 5.5V.
Can PCA9549D,118 be used for level shifting?
- Yes, PCA9549D,118 can be used for level shifting as it supports bidirectional voltage translation.
What is the typical application of PCA9549D,118?
- The typical application includes connecting multiple I2C devices to a single I2C bus.
Does PCA9549D,118 require external power?
- Yes, PCA9549D,118 requires an external power supply for its operation.
What is the I2C address of PCA9549D,118?
- The I2C address of PCA9549D,118 is configurable through its A0, A1, and A2 pins, allowing for multiple devices to be used on the same I2C bus.
Is PCA9549D,118 suitable for high-speed applications?
- Yes, PCA9549D,118 is suitable for high-speed applications as it supports clock frequencies up to 400kHz.
Are there any known issues or limitations with PCA9549D,118?
- Some users have reported issues with signal integrity at higher speeds, so it's important to consider the specific application requirements when using PCA9549D,118.