PCA9546AManufacturer: TI, PH 4-channel I²C switch with reset |
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| Partnumber | Manufacturer | Quantity | Availability |
|---|---|---|---|
| PCA9546A | TI, PH | 890 | In Stock |
Description and Introduction
4-channel I²C switch with reset The **PCA9546A** from Texas Instruments is a versatile 4-channel I²C/SMBus multiplexer designed to enable communication between a single master device and multiple downstream I²C bus segments. By providing selectable channel control, this component simplifies system design in applications requiring multiple I²C devices with identical addresses, reducing address conflicts and improving bus efficiency.  
Featuring a low on-state resistance and support for standard (100 kHz) and fast-mode (400 kHz) I²C operations, the PCA9546A ensures reliable signal integrity across all channels. Its bidirectional voltage-level translation capability allows seamless interfacing between devices operating at different logic levels, making it suitable for mixed-voltage systems.   The device includes an interrupt input for each channel, enabling efficient monitoring of downstream peripherals. Additionally, its power-up state ensures all channels remain deselected, preventing unintended bus contention during initialization. With a compact package and robust ESD protection, the PCA9546A is well-suited for industrial, automotive, and consumer electronics applications where I²C expansion and isolation are critical.   Engineers benefit from its straightforward control via I²C commands, simplifying integration into complex multi-bus architectures while maintaining system reliability and performance. |
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Application Scenarios & Design Considerations
4-channel I²C switch with reset
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