2.5Gb/s Optical Transmitter for DWDM
OAS25321 Series
Document Number QPS-0202-052
August 2002
Oki Electric Industry
1
OAS25321 Series
Part Number
OAS25321x-NV-WDM-yy-zz
Modification History
Rev. Date
Originator
Comments,
Modifications
Features
-Center Wavelength range: 1528.77 to 1563.86nm ITU-T G.692 100GHz channel
spacing
-High output Power +1dBm(Typ)
-Operation speed 150M to 2.7Gbps
-Selection of Clocked or non-clocked operation
-Selection of wavelength 1ch sifting
-Supply voltage: +3.3V and +5V
Application
-SONET and ITU-T compliant at OC-48 and STM-16 and FEC for DWDM
Document Number QPS-0202-052
Revision 0.1
DATE: Aug. 27, 2002
Author T.Arai
Project Manager K. YUSA
2.5Gb/s Optical Transmitter for DWDM
OAS25321 Series
Document Number QPS-0202-052
August 2002
Oki Electric Industry
2
1.
Specifications
Table 1.1 Specifications
(
Vcc =+5.0V5%,Tc=0 to 70C)
Parameter Unit
Values
Mean launched power range
dBm
0 to +2
Maximum Operating Bit Rate
Gbps
2.488
Center wavelength range
nm
1528.77 to 1563.86
Wavelength channel spacing
ITU-T G.692 100GHz channel spacing
Center wavelength accuracy
nm
0.015
Variation center wavelength over temperature
nm
0.05
Maximum spectral width [20dB down]
nm
0. 3(Typ) , 0. 5(Max)
Minimum side mode suppression ratio
dB
30
Center wavelength aging BOL to EOL
nm
0.1
Minimum extinction ratio
dB
8.2
Optical output waveform
Meets for ITU-T G.957
Maximum Fiber Dispersion
ps/nm
2000
Dispersion penalty dB
2
Power consumption W
5
Operating case temperature range C
Tc=0
to+70
Operating humidity %
0
to
85
Dimension
mm
73.4 x 51 x 12.7
Table 1.2 Absolute Maximum Ratings
Parameter Symbol
Condition
Min
Max
Unit
Supply voltage Vcc +5V pin
Vcc
-0.5
+7
V
Supply voltage VTEC+3.3V pin
VTEC
Tc=+25C
-0.5 +4.6 V
Maximum signal input voltage (Clock/Data)
V
I
0
Vcc
V
Maximum signal output current (TDA pin)
I
O
-
-25 +25 mA
Operating case temperature range
T
OP
-20
+85
C
Storage temperature range
T
STG
-40
+85
C
Lead soldering temperature/time
-
- 260/10 C/s
Tensile strength of fiber pigtail cable
-
Tc=+25C
-
500
g
Minimum bending radius of fiber pigtail cable
-
30
mm
2.5Gb/s Optical Transmitter for DWDM
OAS25321 Series
Document Number QPS-0202-052
August 2002
Oki Electric Industry
3
Table 1.3 Electrical Specifications (Vcc =+5.0V5%,Tc=+25C)
Parameter Symbol
Min
Typ
Max
Unit
Power supply voltage
Vcc
+4.75
+5.00
+5.25
V
Power supply current
I
CC
- 350 400
mA
TEC power supply Voltage
V
TEC
+3.0 +3.3 +3.5 V
TEC power supply current
I
TEC
- 0.4 1.0
A
Single end
Vin-single
250 - 1300
Data/Clock Input Amplitude
[AC- Coupled at Internal]
Differential
Vin-diff.
125 650
mVp-p
Input impedance
R
INRoad
-
50
- ohm
Clocked
V
CLK ON
0
- +0.8 V
Clock mode Select input
Voltage
Non
Clocked
V
NON CLK
2.0 - Vcc
V
n
V
n
0 -
+0.8
V
Wavelength Selection input
Voltage
n-1
V
n-1
2.0 - Vcc
V
Enable
V
EN
0 - +0.8
V
Shut Down input Voltage
Disable
V
DIS
2.0 - Vcc V
Normal V
OL
0 - +0.3
V
Deviation
V
OH
+4.5
Vcc V
TEC Temperature deviation error
Monitor (Active High)
Setting
Level
alarm
-1 +1
C
V
OL
0 - +0.3
V
Laser Degrade Alarm (Active Low)
3
V
OH
+4.5 - Vcc V
LD Bias monitor
3
V
LBM
- 20 -
mV/mA
Back facet Monitor
V
BF
- 500 -
mV/mW
DATA/CLOCK input Rise/Fall time
1
t
R
/t
F
- - 0.12
ns
DATA/CLOCK timing
2
ts/th
50
-
-
psec
Input Clock Pulse width distortion
-
40
50
60
%
1. Between 20% and 80%
2.
The data and clock timing diagram is Figure 1.1
3.
See Table 4.1
2.5Gb/s Optical Transmitter for DWDM
OAS25321 Series
Document Number QPS-0202-052
August 2002
Oki Electric Industry
4
50ps
Admitted range of
Cki(+) rise-edge
Di(+)
Cki(+)
50ps
50ps 50ps
ts
th
Figure 1.1 Data/Clock Timing Diagram
2.
Block Diagram
True data input
Wavelength Selection Command
True clk input
LD Driver
APC
Temperature Deviation Alarm
Back facet monitor
False clk input
False data input
LD Module
Clock select
ATC
Laser Bias Monitor
Or
Laser Degraed Alarm
Shut down
OPT OUT
D-F/F
Figure 2.1 Block Diagram
2.5Gb/s Optical Transmitter for DWDM
OAS25321 Series
Document Number QPS-0202-052
August 2002
Oki Electric Industry
5
3.
Package Outline (Unit : mm)
Figure 2.2 Package Outline
2.5Gb/s Optical Transmitter for DWDM
OAS25321 Series
Document Number QPS-0202-052
August 2002
Oki Electric Industry
6
4.
Pin Descriptions
Table 4.1 pin Descriptions
No. Symbol
Functionality
No.
Symbol Functionality
01
GND
Ground ( TEC )
13
VCC
Positive power supply +5.0V
02
BACK(+)
Back facet Monitor
14
VTEC
TEC supply voltage +3.3V
03
BIAS(+)/LDA Laser Bias Monitor or
Laser Degraed Alarm(TTL,Active"Lo")
1
15 GND Ground
04
SDC
Shut Down Command(TTL, Open/
Lo=Operating , Hi=Shutdown)
16 Di(+) True
data
input
05
SELC
Clock mode Select(TTL, Open/
Lo=CLK , Hi=CLK unuse)
17 GND Ground
06
GND
Ground
18
Di(-)
False data input
07 TDA
Temperature
Deviation
ALM
(TTL,Active"High")
19 GND Ground
08
NC
No User Connection
20
Cki(+)
True clock input
09
NC
No User Connection
21
GND
Ground
10
WSC
Wavelength Selection Command
(TTL, Open/Lo=n , Hi=n-1)
22
Cki(-)
False clock input
11 GND
Ground
23 GND Ground
12
NIC
No Internal Connection
24
VCC
Positive power supply +5.0V
1.
Laser Bias Monitor and Laser Degraed Alarm functions are customer select options .
5.
Recommended Interface Circuit
Figure 5.1 Recommended Interface Circuit
01
0.1uF
22uF
VTEC
15uH
0.1uF
22uF
Vcc
15uH
True data input
True clock input
20
16
14
13, 24
06, 11, 15, 17,
19, 21, 23
04
Shut Down
Wavelength selection
10
OAS25321 x-NV-WDM-yy-zz
CML
CMOS/TTL
CMOS
TTL
02
Back facet monitor
03
TEC
Deviation
error Alarm
07
Laser bias monitor
or
Laser degraed alarm
Clock mode Select
05
False clock input
22
18
False data input
2.5Gb/s Optical Transmitter for DWDM
OAS25321 Series
Document Number QPS-0202-052
August 2002
Oki Electric Industry
7
6. Precautions for handling
The circuits of these modules operate at very small signal. In order to avoid the degradation of the optical
sensitivity due to external noise, the bottom pattern of these modules on the PCB should be ground pattern with
low impedance.
Do not mount/pattern device/circuits which generate high frequency noise close to the module.
In order to operate the module stable against the power noise, install the power supply noise reduction circuits.
The impedance between the power and ground pattern of the power circuit should be as low as possible. The
elements around the module should be mounted close to the pins of the module.
If an optical power exceeding the absolute maximum ratings is fed to the module, the optical receiver may be
damaged. Set the optical input power appropriately when in use of these modules.
7. Qualification and Reliability
To help ensure high product reliability and customer satisfaction, OKI is committed to an intensive quality
program that starts in the design phase and proceeds through the manufacturing process.
Optical transceiver modules are qualified to OKI internal standards using MIL-STD-883 test methods and
procedures and using sample techniques consistent with Telcordia requirements.
This qualification program fully meets the intent of Telcordia reliability practices GR-468-CORE.
8. Laser Safety
All version of transceiver are Class 1 Laser products FDA complies with 21 CFR 1040.10 and 1040.11
requirements.
Also, all versions are Class 1 Laser products pre IEC 825-1.
2.5Gb/s Optical Transmitter for DWDM
OAS25321 Series
Document Number QPS-0202-052
August 2002
Oki Electric Industry
8
9. Ordering Information
OAS25321 -NV-WDM - -
Pigtail fiber length
10 =1.0M
08 =0.8M
05 =0.5M
Optical Connector Type;
S = SC connector
F = FC connector
No.
ITU-T FurequencyTHz
Center wavelemgth
61
196.1
1528.77
60
196.0
1529.55
59
195.9
1530.33
58
195.8
1531.12
57
195.7
1531.90
56
195.6
1532.68
55
195.5
1533.47
54
195.4
1534.25
53
195.3
1535.04
52
195.2
1535.82
51
195.1
1536.61
50
195.0
1537.40
49
194.9
1538.19
48
194.8
1538.98
47
194.7
1539.77
46
194.6
1540.56
45
194.5
1541.35
44
194.4
1542.14
43
194.3
1542.94
42
194.2
1543.73
41
194.1
1544.53
40
194.0
1545.32
39
193.9
1546.12
38
193.8
1546.92
37
193.7
1547.72
36
193.6
1548.51
35
193.5
1549.32
34
193.4
1550.12
33
193.3
1550.92
32
193.2
1551.72
31
193.1
1552.52
30
193.0
1553.33
29
192.9
1554.13
28
192.8
1554.94
27
192.7
1555.75
26
192.6
1556.55
25
192.5
1557.36
24
192.4
1558.17
23
192.3
1558.98
22
192.2
1559.79
21
192.1
1560.61
20
192.0
1561.42
19
191.9
1562.23
18
191.8
1563.05
17
191.7
1563.86
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