V23818-M305-B57 Datasheet, PDF (17/19 Pages) Infineon Technologies AG – SFP - Small Form-factor Pluggable Multimode 850 nm 2.125 and 1.0625 Gbit/s Fibre Channel 1.25 Gigabit Ethernet Transceiver with LC™ Connector

V23818-M305-B57
Application Notes
Multimode 850 nm Fibre Channel SFP Transceiver, AC/AC TTL
V_CCT
V_EET
xx nF ¹⁾
V_CCR
V_EER
SFP Module
xx nF ¹⁾
0.1 µF
1 µH
0.1 µF
1 µH
10 µF
Host Board
1) Design criterion of the capacitor used is
the resonant frequency and its value must
be in the order of the nominal data rate.
Short trace lengths are mandatory.
0.1 µF
3.3 V
10 µF
File: 1304
Figure 7 Recommended Host Board Supply Filtering Network
Protocol V_CC
Tx Disable
Tx Fault
Protocol IC
LOS
Protocol V_CC
SerDes IC
PLD / PAL
3.3 V
10 µF 0.1 µF
4.7 to
10 kΩ
Infineon
1 µH
SFP
Transceiver
1 µH
16
xx nF ¹⁾
0.1 µF
V_CCT
17
4.7 to
10 kΩ
Tx Disable
Tx Fault
TD–
0.01 µF
4.7 to
10 kΩ
100 Ω
TD+
V_EET
0.01 µF
xx nF ¹⁾
10 µF 0.1 µF
15
V_CCR
14
Laser
Driver
100 Ω
xx nF ¹⁾
RD+
0.01 µF
RD–
LOS
0.01 µF
Preamp &
Quantizer
3.3 V
4.7 to
10 kΩ
4.7 to
10 kΩ
4.7 to
10 kΩ
V_EER
MOD-DEF(0) MOD-DEF(1) MOD-DEF(2)
1) Design criterion of the capacitor used is the resonant frequency and its value must
be in the order of the nominal data rate. Short trace lengths are mandatory.
Figure 8 Example SFP Host Board Schematic
Data Sheet
17
File: 1305
2003-04-25