Datasheet

FTL-8519-3D GBIC Product Specification – November 2007 Finisar
© Finisar Corporation November 16, 2007 Rev. A4 Page 4
Low Speed Signal Parameters
Parameter Symbol Min Typ Max Units Notes/Conditions
RX_LOS Assert Level -- -30 dBm
RX_LOS Deassert Level -- -19 dBm
RX_LOS Hysteresis -- 0.5 dB
RX_LOS Assert Delay t_loss_on 44 100
μsec
From detection of loss of signal
to assertion of RX_LOS
RX_LOS Negate Delay t_loss_off 44 100
μsec
From detection of presence of
signal to negation of RX_LOS
TX_DISABLE Assert Time t_off 10
μsec
Rising edge of TX_DISABLE to
fall of output signal below 10%
of nominal
TX_DISABLE Negate Time t_on 1000
μsec
Falling edge of TX_DISABLE
to rise of output signal above
90% of nominal
TX_DISABLE Reset Time t_reset 10
μsec
TX_DISABLE HIGH before
TX_DISABLE set LOW
Table 4. Low speed signal parameters
IV. High Speed Electrical Interface
All high-speed PECL signals are AC-coupled internally.
High Speed Electrical
Interface
Parameter Symbol Min Typ Max Units Notes/Conditions
Data Input Voltage V
in
650 2000 mV PECL differential peak - peak
Data Output Voltage V
out
370 2000 mV PECL differential peak - peak
PECL rise/fall t
r
,t
f
260 psec 20%-80% differential
Bit Error Rate BER 10
-12
PRBS 2
7
- 1 test data pattern
Tx Input Impedance Z
in
75 ohm
Rx Output Impedance Z
out
75 ohm
Table 5. High-speed electrical interface