Overview
The PCA9515ADR, produced by Texas Instruments, is a dual bidirectional I2C bus and SMBus repeater designed to enhance the capabilities of I2C systems. This component allows system designers to isolate two halves of a bus, enabling the connection of more I2C devices or the extension of bus trace lengths. It buffers both the serial data (SDA) and serial clock (SCL) signals, retaining all the operating modes and features of the I2C system.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage Range | -0.5 to 7 | V |
| Enable Input Voltage Range | -0.5 to 7 | V |
| I2C Bus Voltage Range | -0.5 to 7 | V |
| Input Clamp Current | -50 | mA |
| Output Clamp Current | -50 | mA |
| Continuous Output Current | ±50 | mA |
| Operating Frequency | Up to 400 kHz | |
| Package Type | 8-SOIC | |
| Pin Count | 8 | |
| Propagation Delay | Typically 45 ns | ns |
| Capacitance | Up to 400 pF per bus | pF |
Key Features
- Buffers both SDA and SCL signals, allowing for longer bus lengths and more devices on the bus.
- Compatible with I2C and SMBus protocols.
- Active-high repeater enable input (EN) for controlling the repeater function.
- Supports up to 400 kHz operating frequency.
- Low propagation delay of typically 45 ns.
- Capable of handling bus capacitance up to 400 pF per bus.
- Available in 8-SOIC package.
Applications
- Extending I2C bus lengths in various applications.
- Increasing the number of devices on an I2C bus.
- Improving signal integrity in noisy environments.
- Used in industrial, automotive, and consumer electronics where I2C communication is required.
- Suitable for systems requiring isolation between different segments of the I2C bus.
Q & A
- What is the primary function of the PCA9515ADR?
The PCA9515ADR is a dual bidirectional I2C bus and SMBus repeater that buffers SDA and SCL signals to extend bus lengths and increase the number of devices on the bus.
- What is the operating frequency range of the PCA9515ADR?
The PCA9515ADR supports operating frequencies up to 400 kHz.
- What package types are available for the PCA9515ADR?
The PCA9515ADR is available in an 8-SOIC package.
- How much bus capacitance can the PCA9515ADR handle?
The PCA9515ADR can handle bus capacitance up to 400 pF per bus.
- What is the typical propagation delay of the PCA9515ADR?
The typical propagation delay is 45 ns.
- Is the PCA9515ADR compatible with SMBus?
- How does the PCA9515ADR improve signal integrity?
The PCA9515ADR improves signal integrity by buffering the SDA and SCL signals, which helps in noisy environments and when extending bus lengths.
- What is the purpose of the active-high repeater enable input (EN)?
The active-high repeater enable input (EN) allows for controlling the repeater function, enabling or disabling the buffering of the I2C signals.
- In what types of applications is the PCA9515ADR commonly used?
The PCA9515ADR is commonly used in industrial, automotive, and consumer electronics where I2C communication is required.
- Can the PCA9515ADR be used to isolate different segments of the I2C bus?
