FCMJ-8520/8521-3 1000BASE-T SFP Product Specification
F i n i s a r
II.
+3.3V Volt Electrical Power Interface
The FCMJ-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
Supply Current
Symbol
I
s
Min
Typ
320
Max
375
Units
mA
Notes/Conditions
1.2W max power over
full range of voltage
and temperature.
See caution note below
Referenced to GND
Input Voltage
Maximum Voltage
Surge Current
V
cc
V
max
I
surge
3.13
3.3
3.47
4
30
V
V
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
SFP Output LOW
SFP Output HIGH
SFP Input LOW
SFP Input HIGH
Symbol
V
OL
V
OH
V
IL
V
IH
Units Notes/Conditions
V
4.7k to 10k pull-up to host_Vcc,
measured at host side of connector
host_Vcc - 0.5 host_Vcc + 0.3
V
4.7k to 10k pull-up to host_Vcc,
measured at host side of connector
0
0.8
V
4.7k to 10k pull-up to Vcc,
measured at SFP side of connector
2
Vcc + 0.3
V
4.7k to 10k pull-up to Vcc,
measured at SFP side of connector
Min
0
Max
0.5
Table 3. Low-speed signals, electronic characteristics
Finisar Corporation March 16, 2005 Rev H
Page 3
FINISAR [ FINISAR CORPORATION. ]
