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PCA9518APW,518
Product Overview
Category
The PCA9518APW,518 belongs to the category of integrated circuits (ICs).
Use
This product is primarily used for level shifting and buffering in I2C bus applications.
Characteristics
- Level shifting capability between different voltage domains
- Bidirectional voltage translation
- Compatible with I2C-bus and SMBus standards
- Supports clock stretching and arbitration
- Low standby current consumption
- High noise immunity
- ESD protection
Package
The PCA9518APW,518 is available in a TSSOP package.
Essence
The essence of this product lies in its ability to facilitate communication between devices operating at different voltage levels within an I2C bus system.
Packaging/Quantity
The PCA9518APW,518 is typically packaged in reels and comes in quantities of 2500 units per reel.
Specifications
- Supply Voltage: 2.3V to 5.5V
- Operating Temperature Range: -40°C to +85°C
- Maximum Data Rate: 400 kbit/s
- Number of Channels: 8
- Input/Output Compatibility: 1.8V, 2.5V, 3.3V, 5V
Detailed Pin Configuration
The PCA9518APW,518 has a total of 20 pins. The pin configuration is as follows:
- SDA1: I2C-bus data line for channel 1
- SCL1: I2C-bus clock line for channel 1
- OE1: Output enable for channel 1
- GND: Ground
- VCC: Supply voltage
- SDA2: I2C-bus data line for channel 2
- SCL2: I2C-bus clock line for channel 2
- OE2: Output enable for channel 2
- SDA3: I2C-bus data line for channel 3
- SCL3: I2C-bus clock line for channel 3
- OE3: Output enable for channel 3
- SDA4: I2C-bus data line for channel 4
- SCL4: I2C-bus clock line for channel 4
- OE4: Output enable for channel 4
- SDA5: I2C-bus data line for channel 5
- SCL5: I2C-bus clock line for channel 5
- OE5: Output enable for channel 5
- SDA6: I2C-bus data line for channel 6
- SCL6: I2C-bus clock line for channel 6
- OE6: Output enable for channel 6
Functional Features
The PCA9518APW,518 offers the following functional features:
- Bidirectional voltage translation between different voltage domains
- Automatic direction sensing and control
- Clock stretching support for slower devices
- Arbitration support for multiple masters on the bus
- Low standby current consumption for power efficiency
- High noise immunity for reliable communication
- Electrostatic discharge (ESD) protection for enhanced durability
Advantages and Disadvantages
Advantages
- Enables communication between devices operating at different voltage levels
- Supports various voltage compatibility options
- Provides bidirectional voltage translation
- Compatible with industry-standard I2C-bus and SMBus protocols
- Offers clock stretching and arbitration capabilities
- Low standby current consumption for power efficiency
- High noise immunity ensures reliable communication
- ESD protection enhances product durability
Disadvantages
- Limited to a maximum data rate of 400 kbit/s
- Requires careful consideration of voltage compatibility and level shifting requirements
Working Principles
The PCA9518APW,518 operates by monitoring the voltage levels on its input channels and automatically translating them to the desired voltage levels on the output channels. It uses a combination of level shifters, direction control logic, and arbitration circuitry to ensure proper bidirectional communication between devices operating at different voltage domains.
Detailed Application Field Plans
The PCA9518APW,518 finds applications in various fields where I2C bus communication is required between devices with different voltage levels. Some specific application areas include:
- Industrial automation systems
- Consumer electronics
- Automotive electronics
- Medical devices
- Telecommunications equipment
- Internet of Things (IoT) devices
Detailed and Complete Alternative Models
Some alternative models that offer similar functionality to the PCA9518APW,518 are:
- PCA9306: Dual bidirectional I2C-bus and SMBus voltage-level translator
- TXB0108: 8-bit
Перелічіть 10 типових запитань і відповідей, пов’язаних із застосуванням PCA9518APW,518 у технічних рішеннях
Sure! Here are 10 common questions and answers related to the application of PCA9518APW,518:
Q: What is PCA9518APW,518? A: PCA9518APW,518 is a level-translating I2C-bus repeater that provides bidirectional voltage-level translation between low-voltage (down to 0.9V) and higher-voltage (up to 5.5V) I2C-bus or SMBus applications.
Q: What is the purpose of PCA9518APW,518? A: The purpose of PCA9518APW,518 is to enable communication between devices operating at different voltage levels in an I2C-bus or SMBus system.
Q: How many channels does PCA9518APW,518 have? A: PCA9518APW,518 has 8 channels, allowing it to translate voltage levels for up to 8 different I2C-bus or SMBus lines.
Q: What is the maximum voltage level that PCA9518APW,518 can handle? A: PCA9518APW,518 can handle voltage levels up to 5.5V on the high-voltage side.
Q: Can PCA9518APW,518 be used for level shifting in both directions? A: Yes, PCA9518APW,518 supports bidirectional level shifting, allowing communication between devices with different voltage levels in both directions.
Q: Does PCA9518APW,518 require external power supply? A: Yes, PCA9518APW,518 requires an external power supply connected to its VCC pin to operate.
Q: What is the maximum data rate supported by PCA9518APW,518? A: PCA9518APW,518 supports a maximum data rate of 400 kHz.
Q: Can PCA9518APW,518 be used in hot-swapping applications? A: Yes, PCA9518APW,518 is designed to support hot-swapping, allowing devices to be added or removed from the bus without disrupting communication.
Q: Are there any special considerations for PCB layout when using PCA9518APW,518? A: It is recommended to follow the layout guidelines provided in the datasheet to ensure proper performance and minimize noise and signal integrity issues.
Q: Can PCA9518APW,518 be used with other I2C-bus repeaters or buffers? A: Yes, PCA9518APW,518 can be cascaded with other I2C-bus repeaters or buffers to extend the bus length or increase the number of devices on the bus.