Overview
The TCA9543APWR, produced by Texas Instruments, is a low-voltage 2-channel I2C bus switch with interrupt logic and voltage translation capabilities. This device is designed to manage multiple I2C or SMBus devices on a single bus, allowing for flexible and efficient communication between different voltage-level devices. It supports a wide range of operating voltages from 1.65 to 5.5 volts, making it versatile for various applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| VCC Supply Voltage Range | -0.5 to 7 | V |
| Input Voltage Range | -0.5 to 7 | V |
| Operating Free-Air Temperature Range | -40 to 85 | °C |
| Storage Temperature Range | -60 to 150 | °C |
| Number of Channels | 2 | |
| Package Type | TSSOP14 | |
| Mounting Type | SMD |
Key Features
- I2C and SMBus compatible
- Two active-low interrupt inputs and one active-low interrupt output
- Active-low reset input to recover from bus-fault conditions
- Voltage translation capability to allow communication between devices with different voltage levels (1.8V, 2.5V, 3.3V, and 5V)
- Programmable control register to select individual or both channels
- 5.5-V tolerant I/O terminals
- Internal power-on reset function
Applications
The TCA9543APWR is suitable for a variety of applications where multiple I2C or SMBus devices need to be managed on a single bus. This includes:
- Embedded systems requiring multiple sensor or peripheral connections
- Industrial automation systems with multiple I2C devices
- Consumer electronics needing to manage multiple low-voltage devices
- Automotive systems with diverse voltage requirements
Q & A
- What is the primary function of the TCA9543APWR?
The primary function of the TCA9543APWR is to act as a 2-channel I2C bus switch, allowing multiple I2C or SMBus devices to share a single bus while providing voltage translation and interrupt logic.
- What is the operating voltage range of the TCA9543APWR?
The TCA9543APWR operates within a voltage range of 1.65 to 5.5 volts.
- How does the TCA9543APWR handle voltage translation?
The TCA9543APWR allows voltage translation between devices operating at different voltage levels (1.8V, 2.5V, 3.3V, and 5V) without additional protection.
- What is the purpose of the RESET input on the TCA9543APWR?
The RESET input is used to recover the device from a bus-fault condition by resetting the I2C state machine and deselecting both channels.
- How many interrupt inputs and outputs does the TCA9543APWR have?
The TCA9543APWR has two active-low interrupt inputs and one active-low interrupt output.
- What is the package type of the TCA9543APWR?
The TCA9543APWR is packaged in a TSSOP14 case.
- What is the operating temperature range of the TCA9543APWR?
The operating temperature range is from -40°C to 85°C.
- Is the TCA9543APWR suitable for automotive applications?
- How does the internal power-on reset function work?
The internal power-on reset function holds the device in a reset condition until the VCC voltage reaches the power-on reset threshold, ensuring proper initialization upon power-up.
- Are the I/O terminals of the TCA9543APWR voltage tolerant?
