Finisar FCLF-8521-3 manual II. +3.3V Volt Electrical Power Interface, III. Low-Speed Signals

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

II.+3.3V Volt Electrical Power Interface

The FCLF-8520/8521-3 has an input voltage range of 3.3 V +/- 5%. The 4 V maximum voltage is not allowed for continuous operation.

+3.3 Volt Electrical Power

Interface

Parameter	Symbol	Min	Typ	Max	Units	Notes/Conditions
Supply Current	Is		320	375	mA	1.2W max power over
						full range of voltage
						and temperature.
						See caution note below
Input Voltage	Vcc	3.13	3.3	3.47	V	Referenced to GND
Maximum Voltage	Vmax			4	V
						Hot plug above steady state
Surge Current	Isurge			30	mA
						current. See caution note
						below
Caution: Power consumption and surge current are higher than the specified values in the SFP MSA
	Table 2. +3.3 Volt electrical power interface

III. Low-Speed Signals

MOD_DEF(1) (SCL) and MOD_DEF(2) (SDA), are open drain CMOS signals (see section VII, “Serial Communication Protocol”). Both MOD_DEF(1) and MOD_DEF(2) must be pulled up to host_Vcc.

Low-Speed Signals,

Electronic Characteristics

Parameter	Symbol	Min	Max	Units	Notes/Conditions
SFP Output LOW	VOL	0	0.5	V	4.7k to 10k pull-up to host_Vcc,
					measured at host side of connector
SFP Output HIGH	VOH	host_Vcc - 0.5	host_Vcc + 0.3	V	4.7k to 10k pull-up to host_Vcc,
					measured at host side of connector
SFP Input LOW	VIL	0	0.8	V	4.7k to 10k pull-up to Vcc,
					measured at SFP side of connector
SFP Input HIGH	VIH	2	Vcc + 0.3	V	4.7k to 10k pull-up to Vcc,
					measured at SFP side of connector
	Table 3. Low-speed signals, electronic characteristics

♥ Finisar Corporation December 16, 2005 RevB Page 3