pca9518a NXP Semiconductors, pca9518a Datasheet - Page 3

• Manufacturer Part Number: pca9518a
• Description: Pca9518a Expandable 5-channel I?c-bus Hub
• Manufacturer: NXP Semiconductors

NXP Semiconductors
4. Block diagram
PCA9518A_1
Product data sheet
Fig 1. Block diagram of PCA9518A
EXPSDA1
EXPSDA2
EXPSCL1
EXPSCL2
SDA0
SDA1
SDA2
SCL0
SCL1
SCL2
EN1
EN2
A more detailed view of
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.
Fig 2. Buffer detail
BUFFER
BUFFER
BUFFER
BUFFER
BUFFER
BUFFER
Rev. 01 — 6 June 2007
Figure 1
enable
data
LOGIC
LOGIC
buffer is shown in
HUB
HUB
V
V
DD
SS
BUFFER
BUFFER
BUFFER
BUFFER
Figure
Expandable 5-channel I
002aac531
PCA9518A
to output
in
inc
2.
PCA9518A
002aac530
© NXP B.V. 2007. All rights reserved.
2
C-bus hub
SCL4
SCL3
SDA4
SDA3
EN4
EN3
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