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參數(shù)資料
| 型號： | V23818-K305-L17 |
| 廠商： | INFINEON TECHNOLOGIES AG |
| 英文描述： | Small Form Factor Multimode 850 nm 1.0625 GBd Fibre Channel 1.25 Gigabit Ethernet Transceiver 2x5 Pinning with LC⑩ Connector |
| 中文描述： | 纖巧850納米多模光纖通道1.0625 GBd千兆以太網(wǎng)收發(fā)器1.25與立法會⑩2x5連接鋼釘 |
| 文件頁數(shù)： | 13/19頁 |
| 文件大?。?/td> | 1351K |
| 代理商： | V23818-K305-L17 |
V23818-K305-B57
Application Notes
Data Sheet
13
2003-04-25
Application Notes
EMI-Recommendations
To avoid electromagnetic radiation exceeding the required limits please take note of the
following recommendations.
When Gigabit switching components are found on a PCB (multiplexers, clock recoveries
etc.) any opening of the chassis may produce radiation also at chassis slots other than
that of the device itself. Thus every mechanical opening or aperture should be as small
as possible.
On the board itself every data connection should be an impedance matched line (e.g.
strip line, coplanar strip line). Data, Datanot should be routed symmetrically, vias should
be avoided. A terminating resistor of 100 should be placed at the end of each matched
line. An alternative termination can be provided with a 50 resistor at each (D, Dn). In
DC coupled systems a thevenin equivalent 50 resistance can be achieved as follows:
for 3.3 V: 125 to
V
CC
and 82 to
V
EE
, for 5 V: 82 to
V
CC
and 125 to
V
EE
at Data
and Datanot. Please consider whether there is an internal termination inside an IC or a
transceiver.
In certain cases signal GND is the most harmful source of radiation. Connecting chassis
GND and signal GND at the plate/bezel/chassis rear e.g. by means of a fiber optic
transceiver/cage may result in a large amount of radiation. Even a capacitive coupling
between signal GND and chassis may be harmful if it is too close to an opening or an
aperture.
If a separation of signal GND and chassis GND is not planned, it is strongly
recommended to provide a proper contact between signal GND and chassis GND at
every location where possible. This concept is designed to avoid hotspots. Hotspots are
places of highest radiation which could be generated if only a few connections between
signal and chassis GND exist. Compensation currents would concentrate at these
connections, causing radiation.
By use of Gigabit switching components in a design, the return path of the RF current
must also be considered. Thus a split GND plane of Tx and Rx portion may result in
severe EMI problems.
The cutout should be sized so that all contact springs of the cage make good contact
with the face plate.
For the SFP transceiver a connection of the SFP cage pins to chassis GND is
recommended. If no separate chassis GND is available on the users PCB the pins
should be connected to signal GND. In this case take care of the notes above.
Please consider that the PCB may behave like a waveguide. With an
wavelength of the harmonics inside the PCB will be half of that in free space. In this
scenario even the smallest PCBs may have unexpected resonances.
r
of 4, the
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| V23818-M305-B57 | SFP - Small Form-factor Pluggable Multimode 850 nm 2.125 and 1.0625 Gbit/s Fibre Channel 1.25 Gigabit Ethernet Transceiver with LC⑩ Connector |
| V23818-M305-L57 | Small Form Factor Multimode 850 nm 2.125 and 1.0625 GBd Fibre Channel 2x5 Transceiver with LC⑩ Connector |
| V23818-S5-B1 | SFP - Small Form-factor Pluggable Cage EMI / Dust Plug |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| V23818-K305-L55 | 制造商:INFINEON 制造商全稱:Infineon Technologies AG 功能描述:Small Form Factor Multimode 850 nm 1.0625 GBd Fibre Channel 1.25 Gigabit Ethernet Transceiver 2x5 Pinning with LC⑩ Connector |
| V23818-K305-L56 | 制造商:Finisar Corporation 功能描述: 制造商:Infineon Technologies AG 功能描述: |
| V23818-K305-L57 | 功能描述:TXRX ETHRNET MULT-MODE 1.25GBIT RoHS:否 類別:光電元件 >> 光纖 - 收發(fā)器 系列:- 標(biāo)準(zhǔn)包裝:20 系列:* |
| V23818K305V10 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:FIBER OPTIC TRANSCEIVER |
| V23818-M305-B57 | 功能描述:TXRX ETHRNET MULT-MODE 1.25GBIT RoHS:否 類別:光電元件 >> 光纖 - 收發(fā)器 系列:- 標(biāo)準(zhǔn)包裝:20 系列:* |
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