Overview
The PCA9515ADGKR, produced by Texas Instruments, is a dual bidirectional I2C bus and SMBus repeater. This component is designed to enhance the functionality and reliability of I2C and SMBus systems by allowing the isolation of two halves of a bus, thereby accommodating more devices or longer trace lengths. It operates within a voltage range of 2.3 to 3.6 volts and supports both Standard Mode and Fast Mode I2C devices, as well as SMBus devices.
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 (VI < 0) | -50 | mA |
| Output Clamp Current (VO < 0) | -50 | mA |
| Continuous Output Current | ±50 | mA |
| Operating Frequency | Up to 400 kHz | |
| Package Type | 8-Pin VSSOP |
Key Features
- Buffers both serial data (SDA) and serial clock (SCL) signals on the I2C bus, retaining all operating modes and features of the I2C system.
- Supports Standard Mode and Fast Mode I2C devices, as well as SMBus devices.
- Operates within a voltage range of 2.3 to 3.6 volts.
- Includes a power-up control circuit to prevent output circuits from becoming active until VCC is at a valid level (VCC = 2.3 V).
- Requires pullup resistors to provide logic high levels on the buffered bus.
- Open-collector configuration of the I2C bus.
- Able to connect two buses of up to 400-pF bus capacitance in an I2C application.
Applications
- I2C and SMBus system extensions to increase the number of devices or trace lengths.
- Isolation of noisy or capacitive sections of the bus.
- Improvement of signal integrity in I2C and SMBus systems.
- Use in embedded systems, industrial automation, and consumer electronics where reliable I2C/SMBus communication is critical.
Q & A
- What is the primary function of the PCA9515ADGKR?
The PCA9515ADGKR is a dual bidirectional I2C bus and SMBus repeater designed to buffer and extend I2C and SMBus signals.
- What voltage range does the PCA9515ADGKR operate within?
The PCA9515ADGKR operates within a voltage range of 2.3 to 3.6 volts.
- What types of I2C devices does the PCA9515ADGKR support?
The PCA9515ADGKR supports Standard Mode and Fast Mode I2C devices, as well as SMBus devices.
- Why are pullup resistors required for the PCA9515ADGKR?
Pullup resistors are required to provide the logic high levels on the buffered bus.
- What is the maximum bus capacitance that can be connected using the PCA9515ADGKR?
The PCA9515ADGKR can connect two buses of up to 400-pF bus capacitance in an I2C application.
- What is the purpose of the power-up control circuit in the PCA9515ADGKR?
The power-up control circuit prevents the output circuits from becoming active until VCC is at a valid level (VCC = 2.3 V).
- What package types are available for the PCA9515ADGKR?
The PCA9515ADGKR is available in an 8-Pin VSSOP package.
- How does the PCA9515ADGKR handle input and output signals to prevent lockup conditions?
The PCA9515ADGKR uses slightly different valid low-voltage levels to avoid lockup conditions between the input and the output of each repeater.
- What is the maximum operating frequency of the PCA9515ADGKR?
The PCA9515ADGKR operates up to a frequency of 400 kHz.
- Where can I purchase the PCA9515ADGKR?
The PCA9515ADGKR can be purchased from various distributors such as Digi-Key, Mouser Electronics, Arrow Electronics, and others.
