Data Sheet
January 2000
1345-Type Receiver with
Clock Recovery and Data Retiming
Characteristics
(continued)
Table 2. Optical Characteristics
Parameter
Measured Average Sensitivity:*
, †
OC-3
OC-12
Maximum Input Power
‡
Link Status Flag Threshold:
‡
Decreasing Light Input
Decreasing Light Input
Flag Hysteresis
Flag Response Time
Detector Responsivity
Symbol
Data Rates
Mbits/s
OC-3/STM-1
OC-12/STM-4
OC-3/STM-1
OC-12/STM-4
OC-3/STM-1
OC-12/STM-4
OC-3/STM-1
OC-12/STM-4
155/622
155/622
155/622
Min
Typ
Max
*
Unit
P
RL
P
RL
P
MAX
—
—
0
–6
–50
–50
–50
–50
0.5
3
0.7
38
–32.5
2
–4
–41
–38.8
–38
–35
3
—
0.8
–36
–30
—
—
–37.5
–32.5
–37.0
–32.0
6
100
1.2
dBm
dBm
dBm
dBm
dBm
dBm
dBm
dBm
dB
µs
A/W
LST
D
LST
I
HYS
t
FLAG
R
* For a 1 x 10
–10
BER. Measured with a 2
23
– 1 pseudorandom word optical input having a 50% average duty cycle.
† Whenever the flag output is deasserted (logic low), the DATA and CLOCK outputs are silenced. See the Flag Output section on
page 2 for the DATA and CLOCK output signal levels.
‡ Power supply noise in excess of 50 mVp-p may degrade the performance of the receiver. See User Interface section for recom-
mended power supply filtering.
DATA
OUT
50%
CLOCK
OUT
50%
T
CDA
1-725(C)
Figure 4. Clock/Data Alignment
Agere Systems Inc.
7
AGERE [ AGERE SYSTEMS ]
