PCA9540BDP,118

PCA9540BDP,118 is a 2-channel I2C-bus multiplexer. This 1-of-2 bidirectional translating multiplexer is controlled via the I2C-bus. The SCL/SDA upstream pair fans out to two SCx/SDx downstream pairs, or channels. Only one SCx/SDx channel is selected at a time, determined by the contents of the programmable control register. A power-on reset function puts the registers in their default state and initializes the I2C-bus state machine with no channels selected. The pass gates of the multiplexer are constructed such that the VDD pin can be used to limit the maximum high voltage that is passed by the PCA9540B.

• Supply voltage range from 2.3V to 5.5V
• I2C-bus interface logic; compatible with SMBus standards
• Channel selection via I2C-bus
• Power-up with all multiplexer channels deselected
• Low Ron switches, No glitch on power-up
• Supports hot insertion, low standby current
• 5V tolerant inputs and 0Hz to 400kHz clock frequency
• Allows voltage level translation between 1.8V, 2.5V, 3.3V and 5V buses
• ESD protection exceeds 2000V HBM per JESD22-A114, and 1000V CDM per JESD22-C101
• 8 pin TSSOP and ambient temperature range from -40 to 85°C