Philips Semiconductors

Product data sheet

PCA9543

2

2004 Oct 01

FEATURES

5 V buses

150 V MM per JESD22-A115 and 1000 V per JESD22-C101

exceeds 100 mA

DESCRIPTION

The PCA9543 is a bi-directional translating switch, controlled by the

pairs, or channels. Any individual SCx/SDx channels or combination

of channels can be selected, determined by the contents of the

programmable control register. Two interrupt inputs, INT0 to INT3,

one for each of the downstream pairs, are provided. One interrupt

output INT, which acts as an AND of the two interrupt inputs, is

provided.

An active-LOW reset input allows the PCA9543 to recover from a

causes all the channels to be deselected, as does the internal power

on reset function.

pin can be used to limit the maximum high voltage which will be

passed by the PCA9543. This allows the use of different bus

voltages on each SCx/SDx 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 pull-up resistors pull the bus up to the desired voltage level

for each channel. All I/O pins are 5 V tolerant.

PIN CONFIGURATION

1

2

3

4

5

6

78

9

10

11

12

13

14

A0

A1

RESET

INT0

SD0

SC0

SDA

SCL

SD1

SC1

INT1

INT

SW00803

Figure 1. Pin configuration

PIN DESCRIPTION

PIN

NUMBER

SYMBOL

FUNCTION

1

A0

Address input 0

2

A1

Address input 1

3

RESET

Active LOW reset input

4

INT0

Interrupt input 0

5

SD0

Serial data 0

6

SC0

Serial clock 0

7

Supply ground

8

INT1

Interrupt input 1

9

SD1

Serial data 1

10

SC1

Serial clock 1

11

INT

Interrupt output

12

SCL

Serial clock line

13

SDA

Serial data line

14

Supply voltage

ORDERING INFORMATION

PACKAGES

TEMPERATURE RANGE

ORDER CODE

DRAWING NUMBER

14-Pin Plastic SO

–40

°C to +85 °C

PCA9543D

SOT108-1

14-Pin Plastic TSSOP

–40

°C to +85 °C

PCA9543PW

SOT402-1

Standard packing quantities and other packaging data are available at www.standardproducts.philips.com/packaging.