PERPI4MSD5V9546ALEX I/O EXPANDER

The PI4MSD5V9546A is a quad bidirectional translating switch controlled via the I2C bus. The SCL/SDA upstream pair fans out to four 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 PI4MSD5V- 9546A to recover from a situation where one of the downstream 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 (POR) function. The pass gates of the switches are constructed such that the VCC pin can be used to limit the maximum high voltage which is passed by the PI4MSD5V9546A. This allows the use of different bus voltages on each pair, so that1.2V, 1.8 V or 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 V tolerant. 1-of-4 bidirectional translating multiplexer I2C-bus interface logic Operating power supply voltage:1.65 V to 5.5 V Allows voltage level translation between 1.2V, 1.8V,2.5 V, 3.3 V and 5 V buses Low standby current Low Ron switches Channel selection via I2C bus Power-up with all multiplexer channels deselected Capacitance isolation when channel disabled No glitch on power-up Supports hot insertion 5 V tolerant inputs 0 Hz to 400 kHz clock frequency ESD protection exceeds 8000 V HBM per JESD22- A114, and 1000 V CDM per JESD22-C101 Latch-up testing is done to JEDEC Standard JESD78 which exceeds 100 mA Packages offered L 16-Pin,173 mil Wide TSSOP, Tape & Reel