TCA9548ARGERQ1

Due to market price fluctuations,if you need to purchase or consult the price.You can contact us or emial to us:   sales@allicdata.com

1. Describe

The TCA9548ARGERQ1 device has eight bidirectional transfer switch, which can be controlled by I2C bus. SCL/SDA upstream pair fanout to Eight downstream pairs or channels. any individual SCn/SDn channel or channel combination can is selected, determined by the content Programmable Control Register. Channels can be used to resolve I2C destination addresses conflict. For example, if eight identical numbers The application requires a temperature sensor, One sensor can be connected to each channel: 0-7. The system controller can reset the TCA9548A-Q1 Timeout or other event of improper operation By deasserting the RESET input. same, Power-on reset deselects all channels and initializes I2C/SMBus state machine. assert reset causes the same reset and initialization to occur There is no need to close this section. This allows recovery If one of the downstream I2C buses is stuck on low state. The door of the switch is constructed like this The VCC pin can be used to limit the maximum High voltage, delivered by the TCA9548A-Q1. Limit the maximum high pressure allowed to use Different bus voltages on each pair, so 1.8V, 2.5 V or 3.3 V parts can communicate with 5 V components without any additional protection. External pull-up resistors pull the bus up to the desired voltage level for each channel. All I/O pins are 5 V tolerant.

2. Feature

    1. AEC-Q100 (Grade 1): Qualified for automotive applications

    2. Functional safety capabilities

        – Documentation available to aid in functional safety system design

    3. 1 to 8 bidirectional transfer switch

    4. I2C bus and SMBus compatible

    5. Active low reset input

    6. Three address pins, allowing up to eight TCA9548A-Q1 devices on the I2C bus

    7. Channel selection via I2C bus, any combination

    8. Start with all switch channels deselected

    9. Low RON switch

  10. Allows voltage level translation between 1.8 V, 2.5 V, 3.3 V, and 5 V buses

  11. Trouble-free startup

  12. Supports hot insertion

  13. Low quiescent current

  14. Operating supply voltage range from 1.65 V to 5.25 V

  15. 5 V tolerant input

  16. 0 to 400 kHz clock frequency

  17. Latch-up performance over 100 mA per JESD 78, Class II

3. Application

    1. Infotainment

    2. Body and Control

    3. Routers (telecommunications switching equipment)

    4. Factory automation

    5. Products with conflicting I2C destination addresses

4. Pin configuration

5. Pin Description

6. Function description

The  TCA9548ARGERQ1 is an 8-channel bidirectional transfer switch for an I2C bus supporting standard mode (100 kHz) and Fast Mode (400 kHz) operation. The TCA9548A-Q1 has an I2C control using a single 8-bit Control register, where each bit controls the enable and disable of one of the corresponding 8 switches Channel for I2C data flow. Depending on the application, voltage translation of the I2C bus can also be implemented Using the  TCA9548ARGERQ1 allows 1.8 V, 2.5 V or 3.3 V parts to communicate with 5 V parts. Furthermore, in If the communication on the I2C bus goes into a fault state, the TCA9548A-Q1 can be reset to return to normal Operates using the RESET pin function or a power-on reset caused by cycling power to the device.

7. Application Information

Applications for the  TCA9548ARGERQ1 include one I2C (or SMBus) controller device and up to eight I2C target devices. The downstream channel is ideal for resolving I2C destination address conflicts. For example, if eight identical The application requires a digital temperature sensor, one sensor can be connected per channel: 0-7. When the temperature of a specific location needs to be read, the corresponding channel can be enabled, all Other channels are closed, data can be retrieved, and the I2C controller can continue to read the next channel. In applications where the I2C bus contains many additional target devices that do not result in an I2C target address conflict, these target devices can be connected to any desired channel to allocate total Bus capacitance across multiple channels. If multiple switches are enabled at the same time, additional design Requirements must be considered.