Published by Infineon Technologies AG
Infineon Technologies AG 1999
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of non-infringement, regarding circuits, descriptions and charts stated herein.
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please contact the Infineon Technologies offices or our Infineon Technologies
Representatives worldwide - see our webpage at
www.infineon.com/fiberoptics
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Due to technical requirements components may contain dangerous substances.
For information on the types in question please contact your Infineon Technologies
offices.
Infineon Technologies Components may only be used in life-support devices or
systems with the express written approval of Infineon Technologies, if a failure of
such components can reasonably be expected to cause the failure of that
life-support device or system, or to affect the safety or effectiveness of that device
or system. Life support devices or systems are intended to be implanted in the
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Infineon Technologies AG
Fiber Optics
Wernerwerkdamm 16
Berlin D-13623, Germany
Infineon Technologies, Inc.
Fiber Optics
1730 North First Street
San J ose, CA 95112, USA
Infineon Technologies K.K.
Fiber Optics
Takanawa Park Tower
20-14, Higashi-Gotanda, 3-chome, Shinagawa-ku
Tokyo 141, J apan
APPLICATION NOTE
Single Mode 1x9 Transceiver
* Recommended choke is Siemens Matsushita B78108-S1153-K or B78148-S1153-K (Q
min
=60, max. DC resistance=0.6
).
The power supply filtering is recommended for good EMI per-
formance. Use short tracks from the inductor L1/L2 to the mod-
ule V
CC
–
RX/V
CC
–
TX. We recommend a V
EE
plane under the
module for getting good EMI and sensitivity performance.
Studs should be connected to this V
EE
plane. The transceiver
contains an automatic shutdown circuit.
Reset is only possible if the power is turned off, and then on
again. V
CC
TX switched below V
TH
. Further application notes for
electrical interfacing are available upon request. Ask for App-
note 82.
Application board available on request.
V
EE
TxD
TxDN
R2
R4
1
1
S2
S1
Top View
Transceiver
R9
R8
R6
1
1
5
V
EE
V
EE
V
EE
V
EE
RxD
RxDN
SD
V
EE
V
EE
V
EE
V
EE
V
EE
V
EE
C3
C4
V
CC
C2
C1
R1
R3
V
CC
R5
R7
8
8
8
8
V
CC
-Tx
V
CC
-Rx
L1
L2
9
1
RxV
EE
TxV
EE
DC coupling between ECL gates
C1/3 = 4.7 μF
C2/4 = 4.7 μF
L1/2 = 15 μH (L2 optional)*
R1/3/5/7 = 82
R2/4/6/8 = 127
R9 = 510