Overview
The PCA9542APW/DG,118 is a 2-channel I²C-bus multiplexer with interrupt logic, manufactured by NXP Semiconductors. This integrated circuit is designed to expand the number of I²C devices that can be connected to a microcontroller or system, simplifying system design and enhancing control capabilities. It operates via the I²C-bus interface and is compatible with SMBus, making it versatile for various applications.
Key Specifications
| Parameter | Value |
|---|---|
| Interface Type | I²C, SMBus |
| No of Channels | 2 |
| Clock Frequency - Max | 400 kHz |
| Supply Voltage - Nom | 2.3 V to 3.6 V |
| Supply Current | ±100 mA |
| Package Style | TSSOP-14 |
| Mounting Method | Surface Mount |
| Operating Power Supply Voltage Range | 2.3 V to 5.5 V |
| 5 V Tolerant Inputs | Yes |
Key Features
- 1-of-2 bidirectional translating multiplexer
- I²C-bus interface logic; compatible with SMBus
- 2 active LOW interrupt inputs (INT0, INT1) and active LOW interrupt output (INT)
- 3 address pins allowing up to 8 devices on the I²C-bus
- Channel selection via I²C-bus
- Powers up with all multiplexer channels deselected
- Low Ron switches
- Allows voltage level translation between 1.8 V, 2.5 V, 3.3 V, and 5 V buses
- No glitch on power-up
- Supports hot insertion
- Low standby current
Applications
- Industrial automation: For controlling multiple I²C devices such as sensors, actuators, or displays.
- Automotive: Suitable for automotive systems requiring multiple I²C device connections.
- Sensor networks: Multiplexing sensor outputs onto a single I²C bus.
- Embedded systems: Expanding I²C device connections without additional microcontroller pins or complex wiring.
Q & A
- What is the PCA9542APW/DG,118 used for? It is used to expand the number of I²C devices that can be connected to a microcontroller or system.
- What is the maximum clock frequency of the PCA9542APW/DG,118? The maximum clock frequency is 400 kHz.
- What is the operating voltage range of the PCA9542APW/DG,118? The operating voltage range is from 2.3 V to 5.5 V.
- Does the PCA9542APW/DG,118 support hot insertion? Yes, it supports hot insertion.
- How many channels does the PCA9542APW/DG,118 have? It has 2 channels.
- What is the package style of the PCA9542APW/DG,118? The package style is TSSOP-14.
- Is the PCA9542APW/DG,118 compatible with SMBus? Yes, it is compatible with SMBus.
- What are the interrupt features of the PCA9542APW/DG,118? It has 2 active LOW interrupt inputs (INT0, INT1) and an active LOW interrupt output (INT).
- Can the PCA9542APW/DG,118 translate voltage levels between different buses? Yes, it allows voltage level translation between 1.8 V, 2.5 V, 3.3 V, and 5 V buses.
- What are the typical applications of the PCA9542APW/DG,118? Typical applications include industrial automation, automotive systems, sensor networks, and embedded systems.
