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FCLF-8520/8521-3 1000BASE-T SFP Product Specification Finisar
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
p
ower 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 Page 3