pca9518d NXP Semiconductors, pca9518d Datasheet - Page 5

• Manufacturer Part Number: pca9518d
• Description: Expandable 5-channel I2c Hub
• Manufacturer: NXP Semiconductors

1. 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
Philips Semiconductors
NOTE:
2004 Sep 29
NOT CONNECTED
Expandable 5-channel I
and/or SDA3/SCL3 and SDA4/SCL4 are pulled up to V
pulled-up to V
DISABLED
SUBSYSTEM 6
SUBSYSTEM 5
100 kHz
400 kHz
SDA
SCL
SDA
SCL
CC
since there is no enable pin.
3.3 V or 5 V
3.3 V or 5 V
3.3 V
5 V
SDA1
SCL1
SDA2
SCL2
SDA3
SCL3
SDA4
SCL4
Figure 4. Typical application: Multiple expandable 5-channel I
PCA9518
DEVICE 2
V
GND
DD
EXPSDA1
EXPSDA2
EXPSCL1
EXPSCL2
SDA0
SCL0
EN1
EN2
EN3
EN4
2
C hub
3.3 V
CC
. SDA0 and SCL0 can be used as a normal I
MASTER
400 kHz
BUS
5
SDA
SCL
EXPSDA1
EXPSDA2
EXPSCL1
EXPSCL2
SDA0
SCL0
EN1
EN2
EN3
EN4
PCA9518
DEVICE 1
GND
V
DD
2
C hubs
SCL2
2
SDA2
SDA3
SCL3
SDA4
SCL4
SDA1
SCL1
C port, but if unused then it must be
3.3 V
3.3 V
5 V
5 V
PCA9518
SDA
SCL
SDA
SCL
SDA
SCL
SDA
SCL
Product data sheet
SUBSYSTEM 2
SUBSYSTEM 1
SUBSYSTEM 3
SUBSYSTEM 4
SW00974
100 kHz
100 kHz
400 kHz
400 kHz