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Data subject to change. Copyright © 2008 Avago Technologies Limited. All rights reserved. Obsoletes AV01-0189EN
AV02-0607EN - January 21, 2008
Notes:
1. Resistance is in Ohms. Capacitance is in microfarads. Inductance is in microhenries.
2. Terminal transmitter input Data and Data-bar at the transmitter input pins. Terminate the receiver Output Data, Data-bar, Status Flag, and
Status Flag-bar at the follow-on device input pins. For lower power dissipation in the Status Flag termination circuitry with small compromise
to the signal quality, each Status Flag output can be loaded with 510 Ohms to ground instead of the two resistor, split -load PECL termination
shown in the Figure 3 schematic.
3. Make dierential signal paths short and same length with equal termination impedance.
4. Signal traces should be 50 Ohms microstrip or stripline transmission lines. Use multilayer, ground-plane printed circuit board for best high-
frequency performance.
5. Use high-frequency, monolithic ceramic bypass capacitors and low series dc resistance inductors. Recommend use of surface-mount coil
inductors and capacitors. In low noise power supply systems, ferrite bead inductors can be substituted for coil inductors. Locate power supply
lter components close to their respective power supply pins.
6. Device ground pin should be directly and individually connected to ground.
7. Caution: Do not directly connect the ber-optic module PECL outputs (Data, Data-bar, Status ag, Status Flag-bar, V
BB
) to ground without
proper current limiting impedance.
Figure 3.
V
BB
+5 V
0.1 µF
82 � 82 �
130 � 130 �
+5 V
0.1 µF
82 � 82 �
130 � 130 �
+5 V
0.1 µF
82 �
130 �
82 �
130 �
0.1 µF
0.1 µF
+5 V
TD
TD
RD
RD
SF
SF
0.1 µF10 µF
GND
GND
GND
GND
GND
GND
DATA
DATA
GND
V
CC
GND
NC
V
CC
DATA
DATA
GND
GND
V
CC
V
CC
GND
SF
SF
GND
GND
GND
GND
GND
1
7
40
3414
21
27
20
4 X 7 PINS
REQUIRED
HFBR-5320
(TOP VIEW)
NC = NO INTERNAL CONNECTION
1 µH
1 µH
