V23848-M15-C56 Datasheet, PDF (18/29 Pages) Infineon Technologies AG – iSFP-Intelligent Small Form-factor Pluggable 1.25 Gigabit Ethernet 2.125/1.0625 Gbit/s Fibre Channel Single Mode 1310 nm Transceiver with LC Connector

V23848-M15-C56
Application Notes
The bezel opening for a transceiver should be sized so that all contact springs of the
transceiver cage make good electrical contact with the face plate. Please consider that
the PCB may behave like a dielectric waveguide. With a dielectric constant of 4, the
wavelength of the harmonics inside the PCB will be half of that in free space. Thus even
the smallest PCBs may have unexpected resonances.
Large systems can have many openings in the front panel for SFP transceivers. In
typical applications, not all of these ports will hold transceivers; some may be
intentionally left empty. These empty slots may emit significant amounts of radiation.
Thus it is recommended that empty ports be plugged with an EMI plug as shown in
Figure 6. Infineon offers an EMI/dust plug, P/N V23818-S5-B1.
SFP Accessories
Cage:
Host Board Connector:
Infineon Technologies
Tyco Electronics
Part Number: V23838-S5-N1/V23838-S5-N1-BB Part Number: 1367073-1
Cage EMI/Dust Plug:
Infineon Technologies
Part Number: V23818-S5-B1
Cage Dust Plug:
Infineon Technologies
Part Number: V23818-S5-B2
CAGE
CAGE EMI/DUST PLUG
HOST BOARD
CONNECTOR
iSFP™
DUST PLUG
Figure 6
Data Sheet
HOST BOARD
File: 1521
18
2004-06-23