Overview
The PCA9548APWRG4 is a low-voltage, 8-channel I2C/SMBus switch produced by Texas Instruments. This device is designed to provide flexible and reliable communication between multiple I2C or SMBus devices on a single bus. It supports voltage-level translation between different bus voltages, making it versatile for various applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Operating Power-Supply Voltage Range | 2.3 to 5.5 | V |
| Channel Count | 8 | - |
| Switch-On Resistance | 4 to 45 | Ω |
| Clock Frequency Range | 0 kHz to 400 kHz | - |
| Package Type | TSSOP (PW) | - |
| Junction-to-Ambient Thermal Resistance | 108.8 | °C/W |
| ESD Rating | Exceeds 100 mA per JESD 78, Class II | - |
Key Features
- 1-of-8 bidirectional translating switches
- I2C bus and SMBus compatible
- Active-low reset input
- Three hardware address pins for use of up to eight PCA9548A devices on the I2C bus
- Channel selection via I2C bus
- Power-up with all switch channels deselected
- No glitch on power up
- Supports hot insertion
- Low standby current
- 5-V tolerant inputs
- Voltage-level translation between 1.8-V, 2.5-V, 3.3-V, and 5-V buses
Applications
- Multi-master I2C bus systems
- Systems requiring voltage-level translation between different I2C or SMBus devices
- Applications needing hot-swappable I2C devices
- Embedded systems with multiple I2C peripherals
- Industrial automation and control systems
Q & A
- What is the PCA9548APWRG4 used for?
The PCA9548APWRG4 is used as an 8-channel I2C/SMBus switch to manage multiple devices on a single I2C or SMBus, allowing for voltage-level translation and hot insertion.
- What is the operating voltage range of the PCA9548APWRG4?
The operating voltage range is from 2.3 V to 5.5 V.
- How many channels does the PCA9548APWRG4 support?
The PCA9548APWRG4 supports 8 channels.
- What is the maximum clock frequency supported by the PCA9548APWRG4?
The maximum clock frequency is 400 kHz.
- Does the PCA9548APWRG4 support hot insertion?
Yes, it supports hot insertion.
- What package type is the PCA9548APWRG4 available in?
The PCA9548APWRG4 is available in a TSSOP (PW) package.
- How does the PCA9548APWRG4 handle power-up?
The device power-ups with all switch channels deselected.
- Does the PCA9548APWRG4 have any specific thermal requirements?
Yes, it has a junction-to-ambient thermal resistance of 108.8 °C/W.
- What is the purpose of the active-low reset input on the PCA9548APWRG4?
The active-low reset input allows the system master to reset the device in case of improper operation or time-out.
- Can the PCA9548APWRG4 be used in multi-master I2C bus systems?
Yes, it is suitable for multi-master I2C bus systems.
