Avago Technologies ACPL-224-500E - Manual (Page 35)

AV02-4387EN 32 Avago Technologies
Description
The above illustration is an unbal-
anced line receiver using the inte-
grated voltage-clamp input opto-
coupler, HCPL-2602. The circuit is
unbalanced because the termina-
tion impedance is different for both
“ends” of the differential signal re-
ceived by the HCPL-2602. TTL data is
con verted to a differential signal via
the differential line driver 9614, and
transmitted over twisted-pair wire.
The Schottky diode helps to improve
the turn-on and turn-off delays.
Performance of Circuit
• Signaling rate: up to 2 MBd at
90 m (up to 10 MBd with polarity
non-reversing driver)
• Optocoupler common­mode
transient rejection:
10,000 V/µs (typical)
Benefits
• Integrated line termination and
voltage clamping saves board
space
• Differential driver and optical iso-
lated receiver reduce or eliminate
transient noise interference
Alternative Avago Parts
1) HCPL-2611 High CMR, High
Speed Optocoupler
2) HCPL-0601/0631 Small Outline,
High Speed Optocoupler
3) HCNW2601 Widebody, High
Speed Optocoupler
Isolated Unbalanced Line Receiver
Data Communications Applications