Preliminary Information
Characteristics
(note 1)
Parameter
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
Power consumption
(2.5 Gbps, Fig. 6)
Power supply current
CML differential input impedance
(Fig. 3,4)
Optical rise/fall time
(20-80%)
Average fiber output power per channel
50/125
µ
m fiber, NA=0.2 (note 2)
Jitter
Contribution
Optical wavelength
Spectral width
Relative Intensity Noise
Extinction ratio (note 5)
Channel skew (note 6)
NMOS output voltage
Transmitter Enable
(TX_EN) (fig. 8)
Low (I
sink
= 3mA)
High
Assert time
De-assert time
Total (note 3)
Deterministic (note 4)
Symbol
P
D
I
CC
Z
IN
t
RO,
t
FO
P
F
TJ
DJ
λ
∆λ
RIN
ER
t
SK
V
LNMOS
V
HNMOS
T
AE
T
DE
T
AR
T
DL
1
2.4
6
830
-7
80
Min
MFT62330A-J
Typ
Max
1.74
556
100
120
130
-3
120
48
840
860
0.85
-118
Unit
W
mA
Ω
ps
dBm
ps
p-p
ps
p-p
nm
nm
dB/Hz
dB
175
0.4
ps
V
V
10
10
100
100
µ
s
µ
s
ms
µ
s
Transmitter Ready (TX_R) assert time (fig. 9)
Laser Safety
Shutdown
(note 7, Fig. 10)
Laser de-assert time
19
Laser assert time
T
AL
20
µ
s
Note 1:
Note 2:
Note 3:
Note 4:
Note 5:
Note 6:
Note 7:
Operating conditions are as per Recommended Operating Conditions. Test pattern PRBS-23 at 2.5Gbps with
50/125
µ
m fiber unless otherwise specified.
The optical output power, measured at the output of a 2 meter 50/125
µ
m fiber test cable, is compliant with
IEC60825-1 Amendment 2, Class 1 Accessible Emission Limits (AEL). With a larger fiber attached, or with no fiber
attached, the output optical power is compliant with IEC60825-1 Amendment 2, Class 1M AEL.
Total Jitter, TJ, equals TP1 to TP2 as defined in IEEE 802.3z Gigabit Ethernet Specification 38.5. Total jitter is
specified at a BER of 10
-12
(TJ=DJ+RJ
rms
x 2Q, where Q=7 for BER 10
-12
and RJ=Random Jitter).
Deterministic jitter includes duty cycle distortion and is measured with zero skew between the differential data
inputs.
Extinction ratio is measured with a PRBS-23 pattern at 622Mbps.
Optical channel skew is measured with the input signals having equal amplitude and no input electrical channel skew.
An activity detector monitors the data input on each of the electrical input channels of the transmitter. If there are no
data transitions on a channel within a certain time (T
DL
), the channel’s laser will be automatically turned off.
This prevents potential non eye-safe conditions caused by the laser being stuck in the “on” state. The channel will
resume normal operation automatically once activity is again detected.
3
ZARLINK [ ZARLINK SEMICONDUCTOR INC ]
