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TCA9548A I2C Multiplexer
TCA9548A
Texas Instrumentsinterface io display
The TCA9548A is a low-voltage 1-to-8 bidirectional I2C switch that fans an upstream bus out to eight selectable channels. It resolves target address conflicts and supports voltage-level translation between 1.8V and 5V buses.
In stock
Specifications
10- Operating Voltage
- 1.65 to 5.5 V
- Supply Current
- 50 µA
- Standby Current Max
- 2 µA
- Channels
- 8
- Interface
- I2C
- I2c Clock Speed Max
- 400 kHz
- Switch On Resistance
- 10 Ω
- I2c Address Pins
- 3
- Operating Temperature Range
- -40 to 125 °C
- Package Types
- TSSOP-24, VQFN-24, VSSOP-24
Pinout
24| Pin | Name | Functions | Notes |
|---|---|---|---|
| 1 | A0 | — | Address input 0. Connect directly to VCC or ground |
| 2 | A1 | — | Address input 1. Connect directly to VCC or ground |
| 3 | RESET | — | Active-low reset input. Pull up to VCC if not used |
| 4 | SD0 | I2C | Serial data channel 0 |
| 5 | SC0 | I2C | Serial clock channel 0 |
| 6 | SD1 | I2C | Serial data channel 1 |
| 7 | SC1 | I2C | Serial clock channel 1 |
| 8 | SD2 | I2C | Serial data channel 2 |
| 9 | SC2 | I2C | Serial clock channel 2 |
| 10 | SD3 | I2C | Serial data channel 3 |
| 11 | SC3 | I2C | Serial clock channel 3 |
| 12 | GND | GND | Ground |
| 13 | SD4 | I2C | Serial data channel 4 |
| 14 | SC4 | I2C | Serial clock channel 4 |
| 15 | SD5 | I2C | Serial data channel 5 |
| 16 | SC5 | I2C | Serial clock channel 5 |
| 17 | SD6 | I2C | Serial data channel 6 |
| 18 | SC6 | I2C | Serial clock channel 6 |
| 19 | SD7 | I2C | Serial data channel 7 |
| 20 | SC7 | I2C | Serial clock channel 7 |
| 21 | A2 | — | Address input 2. Connect directly to VCC or ground |
| 22 | SCL | I2C | Upstream serial clock bus |
| 23 | SDA | I2C | Upstream serial data bus |
| 24 | VCC | POWER | Supply voltage |
Interactive pinout
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TCA9548A
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