FWDM-1629-XX DWDM SFP Preliminary Product Specification – February 2005
F i n i s a r
Finisar Corporation
PRELIMINARY and Confidential
Page 5
Rev C, February 2005
IV.
Low Speed Signals
Parameter
Symbol Min
Typ
Max
Units Notes/Conditions
RX_LOS Assert Level
-42
-36
dBm
RX_LOS Deassert Level
-34
-32
dBm
RX_LOS Hysteresis
0.5
2
dB
RX_LOS Assert Delay
t_loss_on
100
µ
sec From detection of loss of signal
to assertion of RX_LOS
RX_LOS Negate Delay
t_loss_off
100
µ
sec From detection of presence of
signal to negation of RX_LOS
TX_DISABLE Assert Time
t_off
10
µ
sec Rising edge of TX_DISABLE to
fall of output signal below 10%
of nominal
TX_DISABLE Negate Time
t_on
1000
µ
sec Falling edge of TX_DISABLE
to rise of output signal above
90% of nominal. Time
indicated is under steady-state
temperature conditions.
TX_DISABLE Reset Time
t_reset
10
µ
sec TX_DISABLE HIGH before
TX_DISABLE set LOW
TX_FAULT Assert
-0.2
+0.2
nm
TX_Fault will assert before the
device is outside of specified
wavelength range
