Overview
The TCA9544APWR, manufactured by Texas Instruments, is a low-voltage 4-channel I2C and SMBus multiplexer. This component is designed to enable bidirectional voltage-level translation and multiplexing between I2C buses. It is particularly useful in systems where multiple I2C devices with the same address need to be controlled by a single master. The TCA9544APWR is ideal for applications requiring efficient I2C bus management, such as servers, routers, and embedded systems. Its ability to support multiple voltage levels (1.8V, 2.5V, 3.3V, and 5V) makes it a versatile choice for diverse electronic designs.
Key Specifications
| Parameter | Value | Unit | Notes |
|---|---|---|---|
| Channels | 4 | Bidirectional | |
| Voltage Range | 1.65V to 5.5V | Supports multiple bus voltages | |
| Interrupt Inputs | 4 | Low-level active | |
| Interrupt Output | 1 | AND operation of inputs | |
| Package | TSSOP-20 | Surface mount | |
| Operating Temperature | -40°C to +85°C | Industrial range | |
| Clock Frequency | 0 to 400kHz | I2C/SMBus compatible |
Key Features
- Four bidirectional translating switches for I2C/SMBus communication.
- Supports voltage-level translation between 1.8V, 2.5V, 3.3V, and 5V buses.
- Four interrupt inputs and one interrupt output for efficient system monitoring.
- Power-on reset function ensures default state initialization.
- Low standby current for energy-efficient operation.
Applications
The TCA9544APWR is widely used in applications requiring efficient I2C bus management, such as servers, routers, and embedded systems. Its ability to support multiple voltage levels makes it suitable for diverse electronic designs, including industrial automation, consumer electronics, and automotive systems. In these fields, the TCA9544APWR simplifies the control of multiple I2C devices, reducing system complexity and improving reliability.
Q & A
1. What is the primary function of the TCA9544APWR?
The TCA9544APWR is a 4-channel I2C/SMBus multiplexer that enables bidirectional voltage-level translation and multiplexing between I2C buses.
2. What voltage levels does the TCA9544APWR support?
It supports 1.8V, 2.5V, 3.3V, and 5V bus voltages.
3. How many interrupt inputs does the TCA9544APWR have?
It has four low-level active interrupt inputs.
4. What is the operating temperature range of the TCA9544APWR?
It operates from -40°C to +85°C.
5. What package does the TCA9544APWR come in?
It is available in a TSSOP-20 package.
6. Can the TCA9544APWR be used in automotive applications?
Yes, its robust design and wide operating temperature range make it suitable for automotive systems.
7. Does the TCA9544APWR support hot insertion?
Yes, it supports hot insertion, ensuring safe operation during system updates or changes.
8. What is the clock frequency range for the TCA9544APWR?
It supports clock frequencies from 0 to 400kHz.
9. How does the power-on reset function work?
It initializes the device to its default state, ensuring all channels are deselected upon power-up.
10. What are the key advantages of using the TCA9544APWR?
Its ability to manage multiple I2C devices, support voltage-level translation, and provide efficient interrupt handling makes it a versatile and reliable choice for complex systems.
