Overview
The PCA9515ADGKTG4, produced by Texas Instruments, is a dual bidirectional I2C bus and SMBus repeater. This component is designed to isolate two halves of an I2C or SMBus, allowing for the connection of more devices or the extension of bus trace lengths. It buffers both the serial data (SDA) and serial clock (SCL) signals, retaining all operating modes and features of the I2C system. This repeater is particularly useful in applications where bus capacitance needs to be managed or where longer bus lengths are required.
Key Specifications
| Parameter | Minimum | Typical | Maximum | Unit |
|---|---|---|---|---|
| Supply Voltage Range (VCC) | -0.5 | - | 7 | V |
| Enable Input Voltage Range (VI) | -0.5 | - | 7 | V |
| I2C Bus Voltage Range (VI/O) | -0.5 | - | 7 | V |
| Input Clamp Current (IIK) | - | - | -50 | mA |
| Output Clamp Current (IOK) | - | - | -50 | mA |
| Continuous Output Current (IO) | - | - | ±50 | mA |
| Propagation Delay Time (tPZL, tPLZ) | 45 | 82, 113 | 130, 190 | ns |
| Output Transition Time (ttHL, ttLH) | 57, 148 | 58, 147 | - | ns |
| Operating Temperature Range | -40 | - | 85 | °C |
Key Features
- Buffers both SDA and SCL signals, retaining all I2C operating modes and features.
- Supports I2C and SMBus protocols.
- Active-high repeater enable input (EN) to control the repeater function.
- Power-up control circuit to prevent output circuits from becoming active until VCC is at a valid level (VCC = 2.3 V).
- Capable of connecting two buses with up to 400 pF bus capacitance each.
- No direction pin; uses different valid low-voltage levels to avoid lockup conditions.
Applications
The PCA9515ADGKTG4 is suitable for various applications where I2C or SMBus bus extension or isolation is necessary. These include:
- Industrial control systems where longer bus lengths are required.
- Embedded systems needing to connect multiple I2C devices.
- Automotive systems requiring robust and reliable I2C communication.
- Consumer electronics where bus capacitance management is crucial.
Q & A
- What is the primary function of the PCA9515ADGKTG4? The PCA9515ADGKTG4 is a dual bidirectional I2C bus and SMBus repeater designed to isolate two halves of an I2C or SMBus, allowing for more devices or longer trace lengths.
- What are the supported protocols by the PCA9515ADGKTG4? The PCA9515ADGKTG4 supports both I2C and SMBus protocols.
- What is the purpose of the active-high repeater enable input (EN)? The EN input controls the repeater function, allowing the system designer to enable or disable the repeater as needed.
- Can multiple PCA9515A devices be used in series? No, the PCA9515A design does not allow multiple devices to be used in series due to potential lockup conditions.
- What is the operating temperature range of the PCA9515ADGKTG4? The operating temperature range is from -40°C to 85°C.
- How does the PCA9515ADGKTG4 manage bus capacitance? The PCA9515ADGKTG4 can connect two buses with up to 400 pF bus capacitance each, helping to manage and extend the bus length.
- What is the significance of the power-up control circuit in the PCA9515ADGKTG4? The power-up control circuit ensures that the output circuits do not become active until VCC is at a valid level (VCC = 2.3 V), preventing potential issues during power-up.
- What are the typical propagation delay times for the PCA9515ADGKTG4? The propagation delay times (tPZL, tPLZ) are typically around 82 ns and 113 ns, respectively.
- Can the PCA9515ADGKTG4 be used in safety-critical applications? It is important to consult the datasheet and relevant documentation for specific guidelines on using the PCA9515ADGKTG4 in safety-critical applications.
- What are the package options available for the PCA9515ADGKTG4? The PCA9515ADGKTG4 is available in various packages, including VSSOP, SOIC, SON, and others, as detailed in the datasheet and package option addendum.
