Overview
The PCA9515ADGKRG4 is a dual bidirectional I2C bus and SMBus repeater produced by Texas Instruments. This BiCMOS integrated circuit is designed to extend the capabilities of I2C and SMBus systems by buffering both the serial data (SDA) and serial clock (SCL) signals. This allows for the connection of two buses with up to 400 pF of bus capacitance, thereby enabling the accommodation of more devices or longer trace lengths in an I2C application.
Key Specifications
| Parameter | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| VCC Supply Voltage | 2.3 | 3.3 | 3.6 | V | |
| Enable Input Voltage | -0.5 | 7 | V | ||
| I2C Bus Voltage Range | -0.5 | 7 | V | ||
| Input Clamp Current | VI < 0 | -50 | mA | ||
| Output Clamp Current | VO < 0 | -50 | mA | ||
| Continuous Output Current | ±50 | mA | |||
| Clock Frequency | 0 | 400 | kHz | ||
| ESD Protection | >2000 | V HBM |
Key Features
- I2C-bus and SMBus compatible
- Dual bidirectional buffer for serial data (SDA) and serial clock (SCL) signals
- Supports Standard Mode (100 kHz) and Fast Mode (400 kHz) I2C-bus devices
- Active-high repeater enable input with internal pull-up
- Lock-up free operation
- Supports arbitration and clock stretching across the repeater
- Powered-off high-impedance I2C-bus pins
- 5.5 V tolerant I2C-bus (SCLn, SDAn) and enable (EN) pins
- ESD protection exceeds 2000 V HBM per JESD22-A114
Applications
The PCA9515ADGKRG4 is suitable for various applications where I2C or SMBus systems need to be extended. This includes:
- Extending I2C bus length and increasing the number of devices on the bus
- Isolating two halves of a bus to prevent interference or malfunction
- Operating two buses at different voltage levels (e.g., 5 V and 3.3 V) or frequencies (e.g., 400 kHz and 100 kHz)
- Systems requiring high reliability and ESD protection
Q & A
- What is the primary function of the PCA9515ADGKRG4?
The PCA9515ADGKRG4 is a dual bidirectional I2C bus and SMBus repeater that buffers both the serial data (SDA) and serial clock (SCL) signals to extend the capabilities of I2C and SMBus systems.
- What are the supported I2C modes?
The device supports both Standard Mode (100 kHz) and Fast Mode (400 kHz) I2C-bus devices.
- What is the voltage range for the VCC supply?
The VCC supply voltage range is from 2.3 V to 3.6 V.
- How does the active-high repeater enable input work?
The active-high repeater enable input (EN) has an internal pull-up, allowing users to select when the repeater is active and isolate malfunctioning slaves on power-up reset.
- Can the PCA9515ADGKRG4 operate two buses at different voltage levels?
- What is the ESD protection level of the PCA9515ADGKRG4?
The ESD protection exceeds 2000 V HBM per JESD22-A114.
- How does the PCA9515ADGKRG4 handle clock stretching and arbitration?
The device supports arbitration and clock stretching across the repeater.
- What is the maximum bus capacitance supported by the PCA9515ADGKRG4?
The device supports two buses with up to 400 pF of bus capacitance each.
- Can the PCA9515ADGKRG4 be used in applications with different clock frequencies?
- What are the package options for the PCA9515ADGKRG4?
The device is available in various packages, including SOIC and VSSOP.
