Datasheet

PCA9516A_3 © NXP B.V. 2009. All rights reserved.
Product data sheet Rev. 03 — 23 April 2009 3 of 19
NXP Semiconductors
PCA9516A
5-channel I
2
C-bus hub
4. Block diagram
A more detailed view of Figure 1 buffer is shown in Figure 2.
The output pull-down 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 1. Block diagram
PCA9516A
002aae616
V
CC
SCL0
SDA0
EN4
SCL1
SDA4
SDA1
SCL4
EN1
EN3
SCL2
SDA3
SDA2
SCL3
GND
BUFFER
BUFFER
BUFFER
HUB
LOGIC
BUFFER
BUFFER
BUFFER
BUFFER
BUFFER
HUB
LOGIC
BUFFER
BUFFER
EN2
Fig 2. Buffer detail
002aac531
to output
in
inc
data
enable