PCA9546APW

PCA9546APW from Texas Instruments is a Integrated Circuit 4-channel 2.3- to 5.5-V I2C/SMBus switch with reset & voltage translation - I2C & I3C switches & multiplexers. The PCA9546A is a quad bidirectional translating switch controlled via the I 2 C bus. The SCL/SDA upstream pair fans out to four downstream pairs, or channels. Any individual SCn/SDn channel or combination of channels can be selected, determined by the contents of the programmable control register. An active-low reset (RESET) input allows the PCA9546A to recover from a situation in which one of the downstream I 2 C buses is stuck in a low state. Pulling RESET low resets the I 2 C state machine and causes all the channels to be deselected, as does the internal power-on reset function. The pass gates of the switches are constructed such that the V CC pin can be used to limit the maximum high voltage, which will be passed by the PCA9546A. This allows the use of different bus voltages on each pair, so that 1.8-V, 2.5-V, or 3.3-V parts can communicate with 5-V parts 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 5.5-V tolerant.

Base Number: PCA9546
Package: Tube
Standard Package: 90
RoHS: ROHS3 Compliant
REACH: Unaffected
MSL: Unlimited
ECCN: EAR99
HTSUS: 8542.39.0001

Integrated Circuits (ICs) / Interface / Specialized