PCA9518 データシートの表示（PDF） - NXP Semiconductors.

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PCA9518

Expandable 5-channel I2C-bus hub

NXP Semiconductors. 

NXP Semiconductors

4. Block diagram

EXPSCL1

EXPSCL2

SCL0

SCL1

SCL2

EXPSDA1

EXPSDA2

SDA0

SDA1

SDA2

PCA9518

Expandable 5-channel I2C-bus hub

BUFFER

BUFFER

BUFFER

VCC

HUB

LOGIC

PCA9518

BUFFER

BUFFER

BUFFER

BUFFER

BUFFER

HUB

LOGIC

BUFFER

BUFFER

SCL4

SCL3

SDA4

SDA3

EN1

EN2

GND

Fig 1. Block diagram of PCA9518

A more detailed view of Figure 1 buffer is shown in Figure 2.

002aae325

EN4

EN3

PCA9518_5

Product data sheet

data

to output

in

Fig 2. Buffer detail

enable

inc

002aac531

The output pull-down voltage of each internal buffer is set for approximately 0.5 V, while

the input threshold of each internal buffer is set about 0.07 V lower, when the output is

internally driven LOW. This prevents a lock-up condition from occurring.

Rev. 05 — 2 December 2008

© NXP B.V. 2008. All rights reserved.

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