PCA9518 Просмотр технического описания (PDF) - NXP Semiconductors.

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производитель

PCA9518

Expandable 5-channel I2C-bus hub

NXP Semiconductors. 

NXP Semiconductors

PCA9518

Expandable 5-channel I2C-bus hub

is 1 µs or, when the bus 0 SDA reaches 0.7VCC, whichever occurs first. After both

EXPSDA2 and EXPSDA1 are HIGH the rest of the SDA lines are allowed to rise. The

same description applies for the EXPSCL1, EXPSCL2, and SCL pins.

5V

SDA

SCL

SUBSYSTEM 5

100 kHz

3.3 V

VCC

SDA1 EXPSDA1

SCL1

EXPSDA2

EXPSCL1

EXPSCL2

3.3 V

5V

VCC

EXPSDA1 SDA1

SCL1

EXPSDA2

EXPSCL1

EXPSCL2

SDA

SCL

SUBSYSTEM 1

400 kHz

3.3 V

SDA

SCL

SUBSYSTEM 6

400 kHz

3.3 V

or 5 V

SDA2

SCL2

SDA0

SCL0

PCA9518

DEVICE 2

SDA

SCL

SDA0

SCL0

SDA2

SCL2

PCA9518

DEVICE 1

SDA

SCL

SUBSYSTEM 2

400 kHz

5V

disabled;

not connected

SDA3

SCL3

3.3 V

EN1

or 5 V

EN2

EN3

EN4

SDA4

SCL4

GND

BUS

MASTER

400 kHz

SDA3

SCL3

EN1

EN2

EN3

EN4

SDA4

SCL4

GND

SDA

SCL

SUBSYSTEM 3

100 kHz

3.3 V

SDA

SCL

SUBSYSTEM 4

100 kHz

002aae326

Fig 5.

Only two of the five channels on the PCA9518 Device 2 are being used. EN3 and EN4 are connected to GND to disable

channels 3 and 4 and/or SDA3/SCL3 and SDA4/SCL4 are pulled up to VCC. SDA0 and SCL0 can be used as a normal I2C-bus

port, but if unused then it must be pulled up to VCC since there is no enable pin.

The pull-ups shown on Device 2 channels 3 and 4 are not required if their enable pins (ENn) are permanently held LOW.

Typical application: multiple expandable 5-channel I2C-bus hubs

PCA9518_5

Product data sheet

Rev. 05 — 2 December 2008

© NXP B.V. 2008. All rights reserved.

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