V23809-C8-C10 Datasheet, PDF (5/6 Pages) Infineon Technologies AG – Multimode 1300 nm LED Fast Ethernet/FDDI/ATM 170 MBd 1x9 Transceiver

APPLICATION NOTE FOR MULTIMODE 1300 NM LED TRANSCEIVER
Solutions for connecting a Infineon 3.3 V Fiber Optic Transceiver to a 5.0 V Framer-/Phy-Device.
Figure 1. Common GND
Figure 1a. Circuitry for SD (Differential) and
Common GND
V_CC 5.0 V
V_CC 3.3 V
V_CC
V_CC
V_CC 5.0 V
V_CC
Data
In
Framer/Phy
Clock
Data
Recovery _Out
100 nF
100 nF
SD
In
V_CC 3.3 V
V_CC
Rx
Out
Infineon
Tx ^Fiber
In ^Optic
Transceiver
SD
Out
Inputs and outputs are differential and should be
doubled. Signal Detect (SD) is single ended (if used).
Framer/Phy _SD
Clock
Recovery
5V
SD
SD ^Infineon
Fiber
Optic 3.3 V
Transceiver
Figure 1b. Circuitry for SD (Single Ended)
and Common GND
V_CC 5.0 V
V_CC
V_CC 3.3 V
V_CC
1.8 V
Framer/Phy _SD
Clock
In
Recovery
1
5V
SD ^Infineon
Out Fiber
Optic 3.3 V
Transceiver
Figure 2. Common V_CC
Inputs and outputs are differential
and should be doubled. Signal
Detect (SD) is single ended.
1 Zener-Diode 1.8 V
V_CC
Data
In
Framer/Phy
Clock
Data
Recovery _Out
V_CC
V_CC
Rx
Out
GND 3.3 V _Tx
In
Infineon
Fiber
Optic
Transceiver
SD ^{GND 5.0 V}
SD
In
Out
GND 5.0 V
GND 3.3 V
GND 3.3 V
Fiber Optics
V23809-C8–C10, MM 1300 nm LED Fast Ethernet/FDDI/ATM Transceiver
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