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
Symbol
Min
Typ
Max
Units Notes/Conditions
mA 1.2W max power over
full range of voltage
Supply Current
Is
320
375
and temperature.
See caution note below
Referenced to GND
Input Voltage
Vcc
Vmax
Isurge
3.13
3.3
3.47
4
V
V
Maximum Voltage
Surge Current
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
SFP Output LOW
Symbol
VOL
Min
0
Max
0.5
Units Notes/Conditions
V
4.7k to 10k pull-up to host_Vcc,
measured at host side of connector
SFP Output HIGH
SFP Input LOW
VOH
VIL
host_Vcc - 0.5 host_Vcc + 0.3
V
V
4.7k to 10k pull-up to host_Vcc,
measured at host side of connector
4.7k to 10k pull-up to Vcc,
0
2
0.8
measured at SFP side of connector
SFP Input HIGH
VIH
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 March 16, 2005 Rev H
Page 3
FINISAR [ FINISAR CORPORATION. ]
