Overview
The PCA9543APWRG4 is a 2-channel I2C bus switch with interrupt logic and reset, manufactured by Texas Instruments. This device is designed to enable communication between multiple I2C or SMBus devices on different voltage levels, making it versatile for various applications. It features bidirectional translating switches that can handle different bus voltages, such as 1.8-V, 2.5-V, 3.3-V, and 5-V, without additional protection. The device also includes active-low interrupt inputs and an active-low interrupt output, along with a reset feature to recover from bus-fault conditions.
Key Specifications
| Parameter | Value |
|---|---|
| Package | TSSOP (14-pin), SOIC (14-pin) |
| Body Size | TSSOP: 5.00 mm × 4.40 mm, SOIC: 8.65 mm × 3.91 mm |
| VCC Range | 2.3 V to 5.5 V |
| I/O Tolerance | 5.5 V tolerant |
| Maximum SCLK Frequency | 0.4 MHz |
| Interrupt Inputs | Two active-low interrupt inputs |
| Interrupt Output | Active-low interrupt output |
| Reset Input | Active-low reset input |
Key Features
- 1-of-2 bidirectional translating switches for I2C and SMBus compatibility
- Support for different bus voltages (1.8-V, 2.5-V, 3.3-V, and 5-V) without additional protection
- Two active-low interrupt inputs and one active-low interrupt output
- Active-low reset input to recover from bus-fault conditions
- Power-on reset feature
- 5.5 V tolerant I/O pins
Applications
The PCA9543APWRG4 is suitable for a variety of applications where multiple I2C or SMBus devices need to be connected and managed. These include:
- Embedded systems requiring multiple I2C devices
- Industrial automation systems
- Consumer electronics with multiple I2C interfaces
- Automotive systems with diverse voltage requirements
- Medical devices requiring reliable I2C communication
Q & A
- What is the PCA9543APWRG4 used for?
The PCA9543APWRG4 is used as a 2-channel I2C bus switch to enable communication between multiple I2C or SMBus devices on different voltage levels. - What are the supported voltage levels for the PCA9543APWRG4?
The device supports 1.8-V, 2.5-V, 3.3-V, and 5-V bus voltages. - What is the maximum SCLK frequency for the PCA9543APWRG4?
The maximum SCLK frequency is 0.4 MHz. - Does the PCA9543APWRG4 have interrupt capabilities?
Yes, it has two active-low interrupt inputs and one active-low interrupt output. - How does the PCA9543APWRG4 handle bus-fault conditions?
The device can be reset using the active-low reset input or through a power-on reset. - What are the package options for the PCA9543APWRG4?
The device is available in TSSOP (14-pin) and SOIC (14-pin) packages. - Is the PCA9543APWRG4 tolerant to higher voltage levels on I/O pins?
Yes, the I/O pins are 5.5 V tolerant. - Can the PCA9543APWRG4 be used in industrial automation systems?
Yes, it is suitable for industrial automation systems that require multiple I2C devices. - How does the PCA9543APWRG4 handle different voltage levels on each channel?
The device allows different bus voltages on each channel using external pull-up resistors to the desired voltage level. - What is the purpose of the power-on reset feature in the PCA9543APWRG4?
The power-on reset feature holds the device in a reset condition until VCC reaches the power-on reset voltage, ensuring proper initialization.
