Finisar FCLF-8521-3 IV. High-Speed Electrical Interface, High-Speed Electrical Interface Host-SFP

FCLF-8520/8521-3 1000BASE-T SFP Product Specification F i n i s a r

IV. High-Speed Electrical Interface

All high-speed signals are AC-coupled internally.

High-Speed Electrical

Interface,

Transmission Line-SFP

Parameter		Symbol	Min	Typ	Max	Units	Notes/Conditions
Line Frequency		fL		125		MHz	5-level encoding, per
							IEEE 802.3
Tx Output Impedance		Zout,TX		100		Ohm	Differential, for all
							frequencies between
							1MHz and 125MHz
Rx Input Impedance		Zin,RX		100		Ohm	Differential, for all
							frequencies between
							1MHz and 125MHz
	Table	4. High-speed	electrical	interface,	transmission line-SFP

High-Speed Electrical Interface,

Host-SFP

Parameter	Symbol	Min	Typ	Max
Single ended data input	Vinsing	250		1200
swing
Single ended data output	Voutsing	350		800
swing
Rise/Fall Time	Tr,Tf		175
Tx Input Impedance	Zin		50
Rx Output Impedance	Zout		50

Units	Notes/Conditions
mV	Single ended
mV
	Single ended
psec
	20%-80%
Ohm	Single ended
Ohm
	Single ended

Table 5. High-speed electrical interface, host-SFP

♥ Finisar Corporation December 16, 2005 RevB Page 4