PCA9540 데이터 시트보기 (PDF) - Philips Electronics

부품명

상세내역

일치하는 목록

PCA9540

2-channel I2C multiplexer

Philips Electronics 

Philips Semiconductors

2-channel I2C multiplexer

Product specification

PCA9540

FEATURES

• 1-of-2 bi-directional translating multiplexer

• Channel selection via I2C bus

• Operating supply voltage 2.5 to 3.6 V

• Operating temperature range 0°C to 70°C

• Power-up with all multiplexer channels deselected

• Low on resistance

DESCRIPTION

The PCA9540 is a 1-of-2 bi-directional translating multiplexer,

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.

The pass gates of the multiplexer are constructed such that the VDD

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

passed by the PCA9540. This allows the use of different bus

voltages on each SCx/SDx pair, so that 3.3 V parts can

communicate with 5 V parts without any additional protection.

External pull-up resistors can pull the bus up to the desired voltage

level for this channel.

ORDERING INFORMATION

PACKAGES

8-Pin Plastic SO

8-Pin Plastic TSSOP

TEMPERATURE RANGE

0°C to +70°C

0°C to +70°C

PIN CONFIGURATION

SCL 1

SDA 2

VDD 3

SD0 4

8 SC1

7 SD1

6 VSS

5 SC0

SW00491

PIN DESCRIPTION

PIN

NUMBER

SYMBOL

1

SCL

2

SDA

3

VDD

4

SD0

5

SC0

6

VSS

7

SD1

8

SC1

FUNCTION

Serial clock line

Serial data line

Supply voltage

Serial data 0

Serial clock 0

Supply ground

Serial data 1

Serial clock 1

ORDER CODE

PCA9540D

PCA9540PW DH

DRAWING NUMBER

SOT96-1

SOT505-1

1999 Dec 15

2

853–2185 22852

Share Link: