HCPL-7710-020E View Datasheet(PDF) - Avago Technologies
Part Name
Description
MFG CO.
'HCPL-7710-020E' PDF : 17 Pages View PDF
Power Supplies and Bypassing
The recommended PROFIBUS application circuit is
shown in Figure 24. Since the HCPL-x710 are fully com-
patible with CMOS logic level signals, the optocoup
ler is connected directly to the transceiver. Two bypass
capacitors (with values between 0.01 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-
x710. For each capacitor, the total lead length between
both ends of the capacitor and the power supply pins
should not exceed 20 mm. The bypass capacitors are
required because of the high-speed digital nature of
the signals inside the optocoupler.
Being very similar to multi-station RS485 systems, the
HCPL-061N optocoupler provides a transmit disable
function that is necessary to make the bus free after
each master/slave transmission cycle. Specifically, the
HCPL-061N disables the transmitter of the line driver
by putting it into a high state mode. In addition, the
HCPL-061N switches the RX/TX driver IC into the listen
mode. The HCPL-061N offers HCMOS compatibility and
the high CMR performance (1 kV/µs at VCM = 1000 V)
essential in industrial communication interfaces.
GALVANIC
ISOLATION
BOUNDARY
5V
ISO 5 V
8 VDD2
VDD1 1
ISO 5 V
0.01 µF
7
VIN 2
Rx
HCPL-x710
6 VO
3
0.01
µF
5 GND2
GND1 4
8
0.01
1R
VCC
A6
+
µF
SN75176B
RT
SHIELD
4D
B7
–
5V
ISO 5 V
1 VDD1
VDD2 8
Tx
2 VIN
7
0.01
µF
HCPL-x710
0.01 µF
3
VO 6
3 DE
2 RE
GND
5
0.01 µF
1M
4 GND1
GND2 5
Tx ENABLE
5V
1, 0 kΩ
1
2 ANODE
3 CATHODE
4
ISO 5 V
VCC 8
VE 7
0.01
VO 6 µF
GND 5
680 Ω
HCPL-061N
Figure 24. Recommended PROFIBUS application circuit
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Data subject to change. Copyright © 2005-2015 Avago Technologies. All rights reserved. Obsoletes AV01-0564EN
AV02-0641EN - July 21, 2015
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