HCPL-0720-500E Datasheet, PDF (14/18 Pages) AVAGO TECHNOLOGIES LIMITED – 40 ns Propagation Delay, CMOS Optocoupler

Implementing CC-Link with the HCPL‑772X/072X
CC-Link (Control and Communication Link) is developed
to merge control and information in the low-level net-
work (field network) by PCs, thereby making the mul-
tivendor environment a reality. It has data control and
message-exchange function, as well as bit control func-
tion, and operates at the speed up to 10 Mbps.
Power Supplies and Bypassing
The recommended CC-Link circuit is shown in Figure
17. Since the HCPL-772X/072X are fully compatible
with CMOS logic level signals, the optocoupler is con-
nected directly to the transceiver. Two bypass capacitors
(with values between 0.01 µF and 0.1 µF) are required
and should be located as close as possible to the input
and output power supply pins of the HCPL-772X/072X.
For each capacitor, the total lead length between both
ends of capacitor and the power supply pins should not
exceed 20 mm. The bypass capacitors are required be-
cause of the high speed digital nature of the signals in-
side the optocoupler.
FIL
DA
DB
DG
SLD
FG
SN75ALS181NS
VVCCCC
A
R
B
RE
Y
DE
D
Z
GND
GND
Figure 17. Recommended CC-Link application circuit
VDD2
VDD1
(5 V) ^{HCPL-7720#500 (5 V)}
VDD1
VDD2
10 K
VI
VO
RD1
0.1 µ
0.1 µ
GND1
GND
GND2
GND1
HCPL-7720#500
VDD2
VDD1
VO
VI
SD
0.1 µ
0.1 µ
GND
GND
1K
0.1 µ
HC14
10 K
1K
0.1 µ
HC14
10 K
HCPL-2611#560
VOE
NC
VDD
VO
+
–
GND
NC
390
HC14
MPU
BOARD
OUTPUT
HCPL-2611#560
VOE
NC
VDD
VO
+
–
GND
NC
390
HC14
SDGATEON
14