ИС многократного переключателя PCA9544AD,112

Multiplexer , 4 Channels, 1:4, 2.3 V to 5.5 V, SOIC-20

The PCA9544AD,112 is a 4-channel I²C-bus Multiplexer with interrupt logic 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. Four interrupt inputs, INT0 to INT3, one for each of the SCx/SDx downstream pairs, are provided. One interrupt output, INT which acts as an AND of the four interrupt inputs, is provided. A power-on reset function puts the registers in their default state and initializes the I²C-bus state machine with no channels selected.

• 4 Active low interrupt inputs
• Active low interrupt output
• 4 Address pins allowing up to 8 devices on the I²C-bus
• Power-up with all switch channels deselected
• Low RON switches
• No glitch on power-up
• Supports hot insertion
• Low standby current

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