Overview
The PCA9543APWR, produced by Texas Instruments, is a dual bidirectional translating switch controlled by the I2C bus. This component is designed to manage multiple I2C or SMBus channels, allowing for the selection of either individual or both downstream channels through a programmable control register. It features voltage-level translation, interrupt logic, and reset capabilities, making it versatile for various applications requiring I2C bus management.
Key Specifications
| Specification | Value |
|---|---|
| Package | 14-TSSOP (0.173, 4.40mm Width) |
| Pin Count | 14 |
| Supply Voltage Range | 2.3 V to 5.5 V |
| Operating Temperature Range | -40°C to 85°C |
| Clock Frequency | 0 to 400 kHz |
| ESD Protection | 2000-V Human-Body Model (A114-A), 1000-V Charged-Device Model (C101) |
| Input Tolerance | 5.5-V tolerant inputs |
Key Features
- 1-of-2 bidirectional translating switches
- I2C bus and SMBus compatible
- Two active-low interrupt inputs and one active-low interrupt output
- Active-low reset input to recover from bus-fault conditions
- Allows voltage-level translation between 1.8-V, 2.5-V, 3.3-V, and 5-V buses
- No glitch on power-up and supports hot insertion
- Low standby current
- Low RON switches
- Latch-up performance exceeds 100-mA per JESD78
Applications
- Servers
- Routers (Telecom Switching Equipment)
- Factory Automation
- Products with I2C slave address conflicts (e.g., multiple identical temperature sensors)
Q & A
- What is the PCA9543APWR used for?
The PCA9543APWR is used as a dual bidirectional translating switch to manage multiple I2C or SMBus channels. - What is the operating voltage range of the PCA9543APWR?
The operating voltage range is from 2.3 V to 5.5 V. - What is the maximum clock frequency supported by the PCA9543APWR?
The maximum clock frequency supported is 400 kHz. - Does the PCA9543APWR support voltage-level translation?
Yes, it supports voltage-level translation between 1.8-V, 2.5-V, 3.3-V, and 5-V buses. - How many interrupt inputs and outputs does the PCA9543APWR have?
It has two active-low interrupt inputs and one active-low interrupt output. - What is the purpose of the RESET input on the PCA9543APWR?
The RESET input is used to recover the device from a bus-fault condition by resetting the I2C state machine and deselecting both channels. - Is the PCA9543APWR ESD protected?
Yes, it has ESD protection exceeding 2000-V Human-Body Model (A114-A) and 1000-V Charged-Device Model (C101). - What is the package type of the PCA9543APWR?
The package type is 14-TSSOP (0.173, 4.40mm Width). - What is the operating temperature range of the PCA9543APWR?
The operating temperature range is from -40°C to 85°C. - Does the PCA9543APWR support hot insertion?
Yes, it supports hot insertion.
