hdmiulc6-4sc6y STMicroelectronics, hdmiulc6-4sc6y Datasheet - Page 7

• Manufacturer Part Number: hdmiulc6-4sc6y
• Description: Automotive Ultra Large Bandwidth Esd Protection
• Manufacturer: STMicroelectronics

3.3
It’s the reason why some recommendations have to be followed (see
ensure good ESD
Figure 10. ESD behavior: parasitic phenomena due to unsuitable layout
How to ensure good ESD protection
While the HDMIULC6-4SC6Y provides a high immunity to ESD surge, an efficient protection
depends on the layout of the board. In the same way, with the rail to rail topology, the track
from data lines to I/O pins, from V
as short as possible to avoid over voltages due to parasitic phenomena (see
Figure 11
Figure 11. ESD behavior: layout
on data line
on data line
ESD surge
ESD surge
V
V
V
TRANSIL
CL
CL
+
-
for layout considerations).
=
=
V
-
V
optimization
TRANSIL
F
V
L
L
-
BR
I/O
I/O
L
I/O pin
I/O pin
Unsuitable layout
I/O
Optimized layout
+
protection).
Rd.Ip
V
dt
di
F
L
L
L
L
I/O
I/O
I/O
I/O
+
-
L
L
di
di
di
di
dt
dt
dt
dt
GND
I/O
L
L
di
dt
L
L
V
V
VBUS
VBUS
dt
di
GND
GND
F
F
+
L
Doc ID 018879 Rev 1
GND
V
V
GND pin
GND pin
cc
cc
V
V
dt
di
L
L
L
L
pin
pin
CC
TRANSIL
TRANSIL
GND
GND
GND
GND
di
di
di
di
dt
dt
dt
dt
to V
surge
surge
V
V
BUS
CL
CL
Data line
Data line
V
V
>
<
BUS
BUS
0
0
pin, and from GND plane to GND pin must be
Figure 12. ESD behavior: measurement
ESD SURGE
-
-
-
-
L
L
L
L
L
L
L
L
L
L
L
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
dt
dt
dt
dt
dt
dt
dt
dt
dt
dt
dt
di
di
di
di
di
di
di
di
di
di
di
V
V
TRANSIL
TRANSIL
-
-
-
-
+
+
+
+
+
+
+
L
L
L
L
L
L
L
L
L
L
L
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
-V
-V
+V
+V
F
F
dt
dt
dt
dt
dt
dt
dt
dt
dt
dt
dt
di
di
di
di
di
di
di
di
di
di
di
conditions
F
F
TEST BOARD
tr=1ns
tr=1ns
tr=1ns
tr=1ns
tr=1ns
tr=1ns
V
V
V
V
IN
V
V
CL+
CL+
CL+
CL+
CL-
CL-
HDMIULC6 - 4SC6
HDMIULC6 - 4SC6
Section 3.3: How to
POSITIVE
POSITIVE
POSITIVE
POSITIVE
OUT
SURGE
SURGE
SURGE
SURGE
NEGATIVE
NEGATIVE
SURGE
SURGE
Figure 10
t
t
t
t
t
t
Vbus
and
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