T48-Type 1300 and 1500 nm
Uncooled 2.5 Gb/s Laser Transmitters
Data Sheet, Rev. 1
February 2003
TriQuint Optoelectronics
Offering multiple output power options and SONET/SDH com-
patibility, the T48-Type Uncooled Laser Transmitters are manu-
factured in a 24-pin plastic DIP with a single-mode fiber pigtail.
Features
Multisource compliant
Data rates to 2.5 Gb/s
SONET and ITU-T compliant at OC-48 and
STM-16
Uncooled, field-proven InGaAsP MQW laser
1300 nm and 1500 nm versions
Clocked or nonclocked operation with single-ended
or differential inputs
50
ac-coupled ECL or PECL compatible data and
clock inputs
Operation from single +5 V or 5 V power supply
Low-profile, 24-pin nonconductive package
Automatic power control
Wide operating case temperature range:
-- T481, T483, 40 C to +85 C
-- T485, 25 C to +70 C
Laser back-facet monitor output
Laser degrade alarm
Transmitter-disable input
FC, SC, LC, or MU connectors
Applications
Telecommunications:
-- SONET/SDH SR/IR/LR
-- Subscriber loop
-- Metropolitan area networks
High-speed data communication
Description
The T48-Type 2.5 Gb/s Laser Transmitters are
designed for use in transmission systems and high-
speed data communication applications. The transmit-
ter operates at the SONET OC-48 rate, as well as the
ITU-T SDH rate of STM-16.
The transmitters meet all present Telcordia Technolo-
gies
TM GR-253CORE requirements and the ITU-T
G.957 and G.958 recommendations. They are also ide-
ally suited for extended-distance data and networking
applications.
Manufactured in a 24-pin, plastic-encased DIP, the
transmitter incorporates an InGaAs PIN photodiode
back-facet monitor, a GaAs laser driver IC, and a
choice of lasers, including:
1300 nm hermetic Fabry-Perot laser (T481 versions)
1300 nm hermetic MQW isolated DFB laser (T483
versions)
1550 nm hermetic MQW isolated DFB laser (T485
versions)
The transmitter requires a single power supply (+5 V or
5 V). A clock input can be enabled for those applica-
tions where jitter is critical.
Pin information is listed in Table 1.
riQ
T
uin
t
SE
MI
CO
ND
UC
TO
R
T4
8-
Ty
pe
T
ra
ns
m
itt
er
2
2
For additional information and latest specifications, see our website: www.triquint.com
T48-Type 1300 nm and 1500 nm
Data Sheet, Rev. 1
Uncooled 2.5 Gb/s Laser Transmitters
February 2003
Transmitter Processing
The transmitter can withstand normal wave soldering
processes. The complete transmitter module is not her-
metically sealed; therefore, it should not be immersed
in or sprayed with any cleaning solution or solvents.
The process cap and fiber-pigtail jacket can deform at
temperatures greater than 85 C. The transmitter pins
can be wave-soldered at maximum temperature of
250 C for 10 seconds.
Installation Considerations
Although the transmitter has been designed with rug-
gedness in mind, care should be used during handling.
The optical connector should be kept free from dust,
and the process cap should be kept in place as a dust
cover when the device is not connected to a cable. If
contamination is present on the optical connector, the
use of canned air with an extension tube should
remove any debris. Other cleaning procedures are
identified in the Cleaning Fiber-Optic Assemblies Tech-
nical Note (TN95-010LWP).
Connector Options
The standard fiber-optic pigtail is an 8
m core single-
mode fiber in a 0.036 in. (914
m) diameter, tight-buff-
ered outer jacket. The standard length is 39 in. 4 in.
(1 m 10 cm) and can be terminated with either an FC,
SC, LC, or MU optical connector. Other connector
options may be available on special order.
Table 1. Pin Descriptions
* Laser back-facet and bias monitor functions are customer-use
options that are not required for normal operations of the transmit-
ter. They are normally used during manufacture and for diagnos-
tics.
Pins designated no user connection (NUC) cannot be tied to
ground or any other circuit potential.
Pin Number
Name
1
V
EE
2
BF Monitor
*
3
Bias Monitor*
4
Tx Disable
5
Clock Select
6
Ground
7
NUC
8
Laser Degrade Alarm
9
NUC
10
NUC
11
Ground
12
V
EE
13
V
CC
14
NUC
15
Ground
16
DATA
17
Ground
18
DATA
19
Ground
20
Clock
21
Ground
22
Clock
23
Ground
24
V
CC
Absolute Maximum Ratings
Stresses in excess of the absolute maximum ratings can cause permanent damage to the device. These are abso-
lute stress ratings only. Functional operation of the device is not implied at these or any other conditions in excess
of those given in the operations sections of the data sheet. Exposure to absolute maximum ratings for extended
periods can adversely affect device reliability.
*With V
EE
connected to 5 V, V
CC
must be at 0 V; with V
CC
connected to +5 V, V
EE
must be at 0 V.
Parameter
Symbol
Min
Max
Unit
Supply Voltage*
--
--
5.5
V
Operating Case Temperature Range:
T481 and T483
T485
T
C
40
25
85
70
C
C
Storage Case Temperature Range:
T
stg
40
85
C
Lead Soldering Temperature/Time
--
--
250/10
C/s
Relative Humidity (noncondensing)
RH
--
85
%
Minimum Fiber Bend Radius
--
1.00 (25.4)
--
in. (mm)
For additional information and latest specifications, see our website: www.triquint.com
3
Data Sheet, Rev. 1
T48-Type 1300 nm and 1500 nm
February 2003
Uncooled 2.5 Gb/s Laser Transmitters
Characteristics
Minimum and maximum values specified over operating case temperature range at 50% duty cycle data signal.
Typical values are measured at room temperature unless otherwise noted.
1. With V
EE
connected to 5 V, V
CC
must be at 0 V; with V
CC
connected to +5 V, V
EE
must be at 0 V.
2. Inputs are ac-coupled into an equivalent input impedance of 50 .
3. Single-ended or differential operation may be used. If the inputs are driven single-ended, the unused inputs must be ac-coupled (0.1
F) to
ground.
4. Clocked operation is optional. For clocked operation, pin 5 must be tied to V
EE
. With clocked operation, the optical output changes state with
the rising edge of the input clock signal. If left unconnected, the pin will be pulled low, enabling the clock mode.
5.The transmitter is normally enabled and only requires an external voltage to disable.
6.This voltage is measured from pin 3 to V
EE
and is converted to laser bias current with the ratio of 20 mV/mA.
Table 2. Electrical Characteristics
Parameter
Symbol
Min
Typ
Max
Unit
dc Power Supply Voltage
1
V
4.75
5.0
5.25
V
dc Power Supply Current Drain
I
--
180
300
mA
Input Data/Clock Voltage:
2, 3
Single-ended Input
Differential Input
V
IN
V
IN
400
200
800
400
1000
500
mVp-p
mVp-p
Clocked/Nonclocked Select Voltage:
4
Clocked Operation (active-low)
Nonclocked Operation
V
SEL_CLK
V
SEL_CLK
V
EE
V
CC
2.0
--
--
V
EE
+ 0.8
V
CC
V
V
Input Impedance
R
IN
--
50
--
Transmitter Disable Voltage
5
V
DIS
V
CC
2.0
--
V
CC
V
Transmitter Enable Voltage (enabled low)
V
EN
V
EE
--
V
EE
+ 0.8
V
Laser Degrade Alarm:
Normal
Alarmed
--
V
CC
2.0
V
EE
--
--
V
CC
V
EE
+ 0.8
V
V
Laser Bias Voltage
6
V
B
0
200
1600
mV
Back-facet Monitor Voltage (50% duty cycle)
V
BF
470
500
530
mV
Set Time (See Figure 1.)
t
SET
70
--
330
ps
Hold Time (See Figure 1.)
t
HOLD
70
--
--
ps
Optical Rise Time (20%--80%)
t
R
--
--
70
ps
Optical Fall Time (80%--20%)
t
F
--
--
150
ps
4
For additional information and latest specifications, see our website: www.triquint.com
T48-Type 1300 nm and 1500 nm
Data Sheet, Rev. 1
Uncooled 2.5 Gb/s Laser Transmitters
February 2003
Characteristics
(continued)
Figure 1. Electrical Input/Output Interface Timing Diagram
1. Output power definitions and measurement per ITU-T Recommendation G.957 and G.958.
2. Full spectral width measured 20 dB down from the maximum of the central wavelength peak under fully modulated conditions.
3. Ratio of the average output power in the dominant longitudinal mode to the optical power in the most significant side mode under fully
modulated conditions.
4. Ratio of logic 1 output power to logic 0 output under fully modulated conditions.
5. GR-253-CORE, Synchronous Optical Network (SONET) Transport Systems: Common Generic Criteria.
6. ITU-T Recommendation G.957, Optical Interfaces for Equipment and Systems Relating to the Synchronous Digital Hierarchy.
Table 3. Optical Characteristics
Parameter
Symbol
Min
Typ
Max
Unit
Average Power Output:
1
T481xLAA
T483xFAA, T485xFAA
T483xDAA, T485xDAA
P
O
P
O
P
O
10
5
2
5
2
0
3
0
2
dBm
dBm
dBm
Center Wavelength Range:
T481xLAA
T483xFAA
T483xDAA
T485xFAA
T485xDAA
1266
1270
1280
1430
1500
--
--
--
--
--
1360
1360
1335
1580
1580
nm
nm
nm
nm
nm
Spectral Width (T481 Version, F-P Laser)
RMS
--
--
4
nm
Spectral Width (T483/T485 Versions, DFB Laser)
2
20
--
--
1
nm
Wavelength Shift with Temperature:
T481 Version
T483/T485 Versions
/T
/T
--
--
0.4
0.1
--
--
nm/C
nm/C
Side-mode Suppression Ratio
(T483/T485 Version)
3
SSR
30
--
--
dB
Extinction Ratio
4
r
e
8.2
--
--
dB
Shutdown Optical Power
P
SD
--
80
70
dBm
Eye Mask of Optical Output
5, 6
--
Meets SONET and ITU-T
t
SET
t
HOLD
1-1087(F)
For additional information and latest specifications, see our website: www.triquint.com
5
Data Sheet, Rev. 1
T48-Type 1300 nm and 1500 nm
February 2003
Uncooled 2.5 Gb/s Laser Transmitters
Outline Drawing
Dimensions are in inches and (millimeters).
1.100
(27.94)
0.495
(12.57)
0.018
(0.48)
0.100
(2.54)
0.710
(18.03)
2.305
(58.55)
0.950
(24.13)
0.122
(3.10)
0.014
(0.36)
13
24
12
1
0.144
(3.36)
BOTTOM VIEW
0.350
(8.89)
1.000
(25.40)
1.400
(35.56)
1-999.F
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