PCA9540B 데이터 시트보기 (PDF) - NXP Semiconductors.

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PCA9540B

2-channel I²C-bus multiplexer

NXP Semiconductors. 

NXP Semiconductors

PCA9540B

2-channel I2C-bus multiplexer

7.5 Bus transactions

slave address

control register

SDA S 1 1 1 0 0 0 0 0 A X X X X X B2 B1 B0 A P

START condition

R/W acknowledge

from slave

Fig 12. Write control register

acknowledge

from slave

STOP condition

002aae719

slave address

control register

last byte

SDA S 1 1 1 0 0 0 0 1 A X X X X X B2 B1 B0 NA P

START condition

Fig 13. Read control register

R/W acknowledge

from slave

no acknowledge

from master

STOP condition

002aae720

8. Application design-in information

VDD = 2.7 V to 5.5 V

SDA

SCL

I2C-bus/SMBus master

Fig 14. Typical application

VDD = 3.3 V

SDA

SD0

SCL

SC0

PCA9540B

VSS

SD1

SC1

002aae721

V = 2.7 V to 5.5 V

channel 0

V = 2.7 V to 5.5 V

channel 1

PCA9540B_4

Product data sheet

Rev. 04 — 3 September 2009

© NXP B.V. 2009. All rights reserved.

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