PCA9544APW,118

The PCA9544 is a 1-of-4 bidirectional translating multiplexer, controlled via the I2C-bus. The SCL/SDA upstream pair fans out to four 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.

• 1-of-4 bidirectional translating multiplexer
• I2C-bus interface logic; compatible with SMBus
• 4 active LOW interrupt inputs
• Active LOW interrupt output
• 3 address pins allowing up to 8 devices on the I2C-bus
• Channel selection via I2C-bus
• Power-up with all multiplexer channels deselected
• Low Ron switches
• Allows voltage level translation between 1.8 V, 2.5 V, 3.3 V and 5 V buses
• No glitch on power-up
• Supports hot insertion
• Low standby current
• Operating power supply voltage range of 2.3 V to 5.5 V
• 5 V tolerant Inputs
• 0 Hz to 400 kHz clock frequency
• ESD protection exceeds 2000 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
• Three packages offered: SO20, TSSOP20 and HVQFN20