Avago Technologies ACPL-224-500E - Manual (Page 33)

AV02-4387EN 30 Avago Technologies
Description
This is a differential receiver using
a dual-channel HCPL-2630 Opto-
coupler. The receiver circuit can
handle data up to 10 Mbd for short
line lengths. The capaci tance of
the twisted-pair wire introduces a
propagation delay and, as a result,
the data rate decreases with increas-
ing line length. At the optocoupler
output, an optional Exclusive-Or
circuit can be used to increase CMR
and to balance the propagation
delays.
Performance of Circuit
• Signaling rate: up to 10 MBd
• Optocoupler common mode re-
jection: 10,000 V/µs
Benefits
• Dual channel optocoupler reduc-
es boardspace
• Balanced circuit increases CMR
performance thereby eliminat ing
or reducing transient interference
Alternative Avago Parts
1) HCPL-0631 Small Outline, Dual-
Channel, High Speed Optocou-
pler
2) HCPL-4661 High-CMR, Dual-
Channel Optocoupler
3) HCPL-56XX Hermetically Sealed
High Speed Optocouplers
Isolated Balanced Line Receiver - Circuit No. 2
Data Communications Applications
1 2
Z
H
H
DATA
L
I
CM
R
S
V
CM
H
L
HCPL-2631
H
L
0.1 µF R
L
LSTTL EXCLUSIVE–
OR FLIP FLOP
H
L
R
L
+5 V