The PCA9548APW is a 8-channel I2C-bus Switch with reset. The PCA9548A is an octal bidirectional translating switch controlled via the I2C-bus. The SCL/SDA upstream pair fans out to eight downstream pairs or channels. Any individual SCx/SDx channel or combination of channels can be selected, determined by the contents of the programmable control register. An active low reset input allows the PCA9548A to recover from a situation where one of the downstream I2C-buses is stuck in a low state. Pulling the RESET pin low resets the I2C-bus 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 VDD pin can be used to limit the maximum high voltage which will be passed by the PCA9548A.
1-of-8 Bidirectional translating multiplexer
I2C-bus Interface logic, compatible with SMBus standards
Active low reset input
3 Address pins allowing up to 8 devices on I2C-bus
Channel selection via I2C-bus, one channel at a time
Power-up with all channels deselected except channel 0 which is connected
Low Ron multiplexers
Allows voltage level translation between 1.8, 2.5, 3.3 and 5V buses
No glitch on power-up
Supports hot insertion
Low standby current
6V Tolerant inputs
0Hz to 400kHz Clock frequency
Latch-up testing is done to JEDEC standard JESD78 that exceeds 100mA
(EN)
