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Finisar FCLF-8521-3 User Manual

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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 
I
s
 
320 
375 
mA 
1.2W max power over 
full range of voltage 
and temperature. 
See caution note below 
Input Voltage 
V
cc
3.13 3.3  3.47 
V Referenced 
to 
GND 
Maximum Voltage 
V
max
   4  V 
 
Surge Current 
I
surge
 
 
30 
mA 
Hot plug above steady state 
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 
V
OL
0 
0.5 
V 
4.7k to 10k pull-up to host_Vcc, 
measured at host side of connector 
SFP Output HIGH 
V
OH
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 
V
IL
0 
0.8 
V 
4.7k to 10k pull-up to Vcc, 
measured at SFP side of connector 
SFP Input HIGH 
V
IH
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 
 
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