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DESCRIPTION/ORDERING INFORMATION (CONTINUED)

PCA9543A

WITH INTERRUPT LOGIC AND RESET

SCPS169 – SEPTEMBER 2007

An active-low reset (RESET) input allows the PCA9543A to recover from a situation where one of the

channels to be deselected, as does the internal power-on reset function.

voltage, which will be passed by the PCA9543A. This allows the use of different bus voltages on each pair, so

that 1.8-V, 2.5-V, or 3.3-V parts can communicate with 5-V parts without any additional protection. External

pullup resistors pull the bus up to the desired voltage level for each channel. All I/O pins are 5-V tolerant.

TERMINAL FUNCTIONS

D AND PW

NAME

DESCRIPTION

PIN NUMBER

1

A0

2

A1

3

RESET

4

INT0

5

SD0

6

SC0

7

GND

Ground

8

INT1

9

SD1

10

SC1

11

INT

12

SCL

13

SDA

14

Supply power

2

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Product Folder Link(s): PCA9543A