Overview
The PCA9543APW,112 is a 2-channel I2C-bus multiplexer with interrupt logic, manufactured by NXP USA Inc. This component is designed to facilitate the connection of multiple I2C devices to a single I2C bus, enabling individual communication with each device. It features user-programmable I2C-bus addresses and supports a wide operating voltage range, making it versatile for various applications. The device includes dual input channels that are independently controllable, and an interrupt logic feature that notifies the microcontroller of channel selection or deselection. Its compact TSSOP-14 package and low standby current consumption of 5µA make it ideal for space-constrained and energy-efficient designs.
Key Specifications
| Parameter | Value |
|---|---|
| Package Type | TSSOP-14 |
| Operating Voltage Range | 2.3V to 5.5V |
| Clock Frequency | 0 Hz to 400 kHz |
| Interrupt Inputs | Two active-low interrupt inputs (INT0, INT1) |
| Interrupt Output | One active-low interrupt output (INT) |
| Reset Input | Active-low reset input |
| Address Pins | Two address pins allowing up to four devices on the I2C-bus |
| Standby Current | 5µA |
| ESD Protection | Exceeds 2000 V HBM and 1000 V CDM |
| Latch-Up Performance | Exceeds 100 mA per JESD78 |
Key Features
- 1-of-2 bidirectional translating switches
- I2C-bus and SMBus compatible
- Low RON switches
- Voltage level translation between 1.8V, 2.5V, 3.3V, and 5V buses
- No glitch on power-up
- Supports hot insertion
- High-reliability construction with long lifespan
- Configurable device settings for customization
- Low EMI and high-frequency immunity for reliable operation
- Fault detection and self-healing capabilities
Applications
- Industrial automation applications
- Smart home sensor networks
- Automotive control systems
- Servers and routers (telecom switching equipment)
- Factory automation
- Products with I2C slave address conflicts (e.g., multiple identical temperature sensors)
Q & A
- What is the PCA9543APW,112 used for? The PCA9543APW,112 is used to connect multiple I2C devices to a single I2C bus, allowing individual communication with each device.
- What is the operating voltage range of the PCA9543APW,112? The operating voltage range is from 2.3V to 5.5V.
- What is the maximum clock frequency supported by the PCA9543APW,112? The maximum clock frequency supported is 400 kHz.
- Does the PCA9543APW,112 support voltage level translation? Yes, it supports voltage level translation between 1.8V, 2.5V, 3.3V, and 5V buses.
- What is the standby current consumption of the PCA9543APW,112? The standby current consumption is 5µA.
- How many interrupt inputs and outputs does the PCA9543APW,112 have? It has two active-low interrupt inputs and one active-low interrupt output.
- What is the purpose of the reset input on the PCA9543APW,112? The active-low reset input allows the device to recover from a situation where one of the downstream I2C buses is stuck in a low state.
- What types of applications is the PCA9543APW,112 commonly used in? It is commonly used in industrial automation, smart home sensor networks, automotive control systems, and telecom switching equipment.
- Does the PCA9543APW,112 support hot insertion? Yes, it supports hot insertion.
- What is the package type of the PCA9543APW,112? The package type is TSSOP-14.
