PCA9518 View Datasheet(PDF) - NXP Semiconductors.

Part Name

Description

Manufacturer

PCA9518

Expandable 5-channel I2C-bus hub

NXP Semiconductors. 

NXP Semiconductors

PCA9518

Expandable 5-channel I2C-bus hub

Bus 0

SCL of

master

SDA of

master

EXPSDA1

tPHL2

expansion

bus

EXPSDA2

EXPSCL1

VOL of master

tPHL1

tPLH1

9th clock cycle

VOL of PCA9518

tstretch

tPLH2, tPLH1

tPLH2

9th clock cycle

EXPSCL2

Bus 1

SCL of

slave

SDA of

slave

tPHL

Bus n

with n > 1

Fig 6. Bus waveforms

VOL of slave

tPLH

VOL of PCA9518

002aae327

It is important to note that any arbitration or clock stretching events on Bus 1 require that

the VOL of the devices on Bus 1 be 70 mV below the VOL of the PCA9518 (see VOL−VILc in

Section 9 “Static characteristics”) to be recognized by the PCA9518 and then transmitted

to Bus 0.

PCA9518_5

Product data sheet

Rev. 05 — 2 December 2008

© NXP B.V. 2008. All rights reserved.

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