Technical information
USBLC6-2
2.5
Application examples
Figure 14. USB 2.0 port application diagram using USBLC6-2
+ 3.3V
DEVICE-
HUB-
+ 5V
UPSTREAM
TRANSCEIVER
DOWNSTREAM
TRANSCEIVER
RPU
Protecting
Bus Switch
USB
connector
SW2
SW1
V
V
BUS
BUS
VBUS
D+
R
+
R
R
T
+
X LS/FS
X LS/FS
X HS
R
+
+
X HS
T
+
+
X HS
X HS
R
R
X LS/FS -
X LS/FS -
X HS -
R
R
T
X HS -
X HS -
T
D-
X HS -
GND
+
GND
RS
RS
GND
RS
RS
T
T
+
X LS/FS
X LS/FS
USBLC6-2SC6
T
T
X LS/FS -
X LS/FS -
RPD
RPD
+ 3.3V
RPU
DEVICE-
UPSTREAM
TRANSCEIVER
USB
connector
SW2
SW1
V
BUS
VBUS
D+
R
R
T
+
R
+
X LS/FS
X LS/FS
+
R
+
X HS
X HS
+
T
+
X HS
X HS
R
R
X LS/FS -
X HS -
X LS/FS -
R
T
R
X HS -
X HS -
D-
T
X HS -
GND
GND
RS
RS
RS
RS
GND
T
+
T
+
USBLC6-4SC6
X LS/FS
X LS/FS
USBLC6-2P6
T
T
X LS/FS -
X LS/FS -
RPD
RPD
Mode
SW
SW
2
1
Low Speed LS
Full Speed FS
High Speed HS
Open
Closed
Open
Closed
Closed then open Open
Figure 15. T1/E1/Ethernet protection
+VCC
Tx
100nF
SMP75-8
DATA
TRANSCEIVER
+VCC
Rx
100nF
SMP75-8
8/14
Doc ID 11265 Rev 5
STMICROELECTRONICS [ ST ]
