1243CBDC - TriQuint Semiconductor

1241/1243/1245-Type Uncooled Laser Transmitters

Data Sheet

February 2003

TriQuint Optoelectronics

Offering multiple output power options and SONET/SDH com-

patibility, the 1241/1243-Type Uncooled Laser Transmitter is

manufactured in a 20-pin, plastic DIP with a single-mode fiber

pigtail.

Features

■Backward compatible with 1227/1229/1238-Type

Laser Transmitters

■Space-saving, self-contained, 20-pin DIP

■Uses field-proven, reliable InGaAsP MQW laser

■Requires single 5 V power supply

■SONET/SDH compatible

■Uncooled laser with automatic optical power control

for constant output power over case temperature

range

■No thermoelectric cooler required; reduces size and

power consumption

■Uses low-power dissipation CMOS technology

■Qualified to meet the intent of Telcordia

Technologies ™ reliability practices

■Operates over data rates to 1062.5 Mb/s (NRZ)

■Operation at 1.3 µm or 1.55 µm wavelength

■Typical average output power options of –11 dBm,

–8 dBm, –5 dBm, –2 dBm, and 0 dBm

■ECL compatible, differential inputs

■Operating temperature range of –40 °C to +85 °C

■Transmitter-disable option

Applications

■Telecommunications

— Inter- and intraoffice SONET/ITU-T SDH

— Subscriber loop

— Metropolitan area networks

■High-speed data communications

— Fibre channel (FC-0)

1241-Type

Uncooled Laser Transmitter

riQ

uint

SEMICONDUCTOR

1241-Type

Uncooled Laser Transmitter

1241-Type

Uncooled Laser Transmitter

Data Sheet

February 2003 1241/1243/1245-Type Uncooled Laser Transmitters

22 For additional information and latest specifications, see our website: www.triquint.com

Description

The 1241/1243/1245-type Laser Transmitters are

designed for use in transmission systems and high-

speed data communication applications. Used in

intraoffice and intermediate-reach applications, the

transmitters are configured to operate at SONET rates

up to OC-12, as well as at ITU-T synchronous digital

hierarchy (SDH) rates up to STM-4. Specific versions

are also capable of operating up to 1062.5 Mb/s.

The transmitter meets all present Telcordia Technolo-

gies GR-253-CORE requirements, ANSI T1.117-1991

SONET single-mode, and the ITU-T G.957 and G.958

recommendations. (See Table 5 to select transmitters

for the various SONET/SDH segments.)

The transmitter requires a single power supply (+5 V or

–5 V) and operates over data rates of 1 Mb/s to

622 Mb/s (NRZ). Automatic power control circuitry pro-

vides constant optical output power over the operating

case temperature range. The automatic power control

circuitry also compensates for laser aging. The optical

wavelength tolerance at 25 °C is 1310 nm. The temper-

ature coefficient of wavelength for 1.3 µm Fabry-Perot

transmitters (1241-Type) is approximately 0.4 nm/°C.

The temperature coefficient of wavelength for 1.3 µm

and 1.55 µm distributed-feedback (DFB) transmitters

(1243/1245-Type) is approximately 0.1 nm/°C.

Transmitters are available for operation over several

different temperature ranges from –40 °C to +85 °C.

Manufactured in a 20-pin DIP, the transmitter consists

of a hermetic, InGaAs laser and a single CMOS driver

IC. The low-power consumption circuit provides modu-

lation, automatic optical output power control, and data

reference. The module can be driven by either ac- or

dc-coupled data in single-ended or differential configu-

ration. (See Recommended User Interfaces section for

typical connection schemes.) The laser bias and back-

facet monitor currents are electrically accessible for

transmitter performance monitoring. The transmitter

optical output may be disabled by a logic-level input.

Functional Overview

Transmitter Circuit Description and

Operation

Figure 1 shows a simplified schematic of the transmit-

ter; pin information is listed in Table 1. The laser within

the transmitter is driven by a single CMOS integrated

circuit, which provides the input data signal reference

level with automatic, temperature-compensated laser

bias, and modulation-current control. A back-facet pho-

todetector diode within the laser module provides an

indication of the laser's average optical output power.

The back-facet diode current is accessible as a voltage

proportional to photocurrent through pins 17 and 19 on

the transmitter. The back-facet diode also forms part of

the feedback control circuit, which helps maintain con-

stant output power.

The laser bias current is accessible as a dc-voltage by

measuring the voltage developed across pins 2 and 4

of the transmitter. Dividing this voltage by 10 Ω will

yield the value of the laser bias current. This value will

change up or down in response to operating tempera-

ture, power supply voltage, data pattern, and laser

aging characteristics.

Table 1. Pin Descriptions

* Pins designated as no user connection should not be tied to

ground or any other circuit potential.

† Laser back-facet and bias monitor functions are customer-use

options that are not required for normal operations of the trans-

mitter. They are normally used during manufacture and for

diagnostics.

Pin Number Name

1 No user connection*

2 Laser bias monitor (+)†

3 No user connection*

4 Laser bias monitor (–)†

5VEE

6VCC

7 Transmitter disable

9VCC

10 No user connection†

11 Case ground (RF ground)

12 VCC

13 Case ground (RF ground)

14 VEE

15 DATA

16 DATA

17 Laser back-facet monitor (–)*

18 VCC

19 Laser back-facet monitor (+)*

20 No user connection†

For additional information and latest specifications, see our website: www.triquint.com 3

Data Sheet

1241/1243/1245-Type Uncooled Laser Transmitters February 2003

Functional Overview (continued)

1-868(C).h

Figure 1. Simplified Transmitter Schematic Input Data

Input Data

Data enters the transmitter through a comparator.

These inputs have internal pull-down resistors to a volt-

age reference that is 1.3 V below VCC. This configura-

tion allows the transmitter to be driven from either a

single-ended or a differential input signal. Since the

input is a comparator instead of a gate, the absolute

input signal levels are not important when the inputs

are driven differentially. When driven single-ended,

however, the input signal voltage should be centered

around VCC – 1.3 V to eliminate pulse-width distortion.

With a single-ended input, either input can be used and

the unused input can be left as an open circuit due to

the internal reference shown in Figure 1. The optical

output signal will be in the same sense as the input

data—an input logic high turns the laser diode on and

an input logic low turns the laser diode off. However, if

the negative input is used with a single-ended data

input signal, the optical signal will be the complement

of the data input signal.

The differential inputs of the 1241 Gbit versions are ter-

minated internally with 100 Ω between the DATA and

DATA inputs.

Minimum Data Rate

Because the modulation and bias control circuitry are

influenced by the input data pattern, the standard trans-

mitter cannot be used in burst-mode type applications.

For burst-mode applications, please contact your

TriQuint Account Manager. The minimum data rate

(pseudorandom data, 50% average duty cycle) for the

1241/1243/1245-Type Transmitters is approximately

1 Mb/s.

Data Sheet

February 2003 1241/1243/1245-Type Uncooled Laser Transmitters

44 For additional information and latest specifications, see our website: www.triquint.com

Functional Overview (continued)

Since most applications operate at very high data

rates, high-frequency design techniques need to be

used to ensure optimum performance from the trans-

mitter and interfacing circuitry. Input signal paths

should be kept as short and as straight as possible; dif-

ferential signal lines should be equal in length, and

controlled-impedance stripline or microstrip construc-

tion should always be used when laying out the

printed-wiring board traces for the data lines. The Rec-

ommended User Interfaces section of this data sheet

shows several methods of interfacing to the transmitter.

Power Supplies

The transmitter is configured for operation from either a

single +5 V power supply or a single –5 V power sup-

ply. For positive power supply operation, connect Vcc

to the +5 V power supply and connect VEE to ground or

circuit common. For operation from a –5 V power sup-

ply, connect VCC to ground and connect VEE to the –5 V

power supply. Whichever option is chosen, the VCC or

VEE connection to the transmitter should be well filtered

to prevent power supply noise from interfering with

transmitter operation.

Transmitter Specifications

Optical Output Power

During manufacture, the optical output power of every

transmitter is tuned to the typical value specified in the

data sheet for that particular transmitter code. The tun-

ing is performed at room ambient and a power supply

voltage of 5 V. The minimum and maximum values

listed in the data sheet for each code group reflect the

worst-case limits that the transmitter is expected to

operate within over its lifetime and over the allowed

power supply and the operating temperature range.

Every transmitter shipped receives a final test, which

includes a SONET eye-mask test at either the OC-3

(STM-1) data rate of 155.52 Mb/s, the OC-12 (STM4)

data rate of 622.08 Mb/s, or the fibre channel FC-0

data rate of 1062.5 Mb/s. The eye-mask test is meant

to examine the performance of the transmitter's output

optical waveform relative to a minimum data pattern

eye opening.

Connector Options

The standard optical fiber pigtail is 8 µm core single-

mode fiber having a 0.036 in. (914 µm) diameter tight-

buffered outer-jacket. The standard length is 39 in. ±

4 in. (1 m ± 10 cm) and can be terminated with either

an SC or FC-PC optical connector. Other connector

options may be available on special order. Contact

your TriQuint Account Manager for ordering informa-

tion.

Handling Precautions

CAUTION: This device is susceptible to damage as

a result of electrostatic discharge (ESD).

Take proper precautions during both

handling and testing. Follow guidelines

such as JEDEC Publication No. 108-A

(Dec. 1988).

Although protection circuitry is designed into the

device, take proper precautions to avoid exposure to

ESD. TriQuint employs a human-body model (HBM) for

ESD-susceptibility testing and protection-design evalu-

ation. ESD voltage thresholds are dependent on the

critical parameters used to define the model. A stan-

dard HBM (resistance = 1.5 kΩ, capacitance = 100 pF)

is widely used and, therefore, can be used for compari-

son purposes. The HBM ESD withstand voltage estab-

lished for the 1241-/1243-Type Transmitter is ±1000 V.

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 deformation

temperature is 85 °C. Transmitter pins can be wave-

soldered at maximum temperature of 250 °C for

10 seconds.

Installation Considerations

Although the transmitter features a robust design, 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, canned air with an

extension tube can be used to remove any debris.

Other cleaning procedures are identified in the techni-

cal note, Cleaning Fiber-Optic Assemblies (TN95-

010LWP).

For additional information and latest specifications, see our website: www.triquint.com 5

Data Sheet

1241/1243/1245-Type Uncooled Laser Transmitters February 2003

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 VEE connected to –5 V, VCC must be at 0 V; with VCC connected to +5 V, VEE must be at 0 V.

†Specification depends upon the code ordered. The device is capable of a cold start at –40 °C; specifications are met

after a warm-up time determined by the system thermal design.

Characteristics

Minimum and maximum values specified over operating case temperature range at 50% duty cycle data signal and

end of life (EOL). Typical values are measured at beginning-of-life (BOL) room temperature unless otherwise

noted.

Table 2. Electrical Characteristics

1. With VEE connected to –5 V, VCC must be at 0 V; with VCC connected to +5 V, VEE must be at 0 V.

2. Input measured from VCC with 50 Ω load to (VCC – 2 V). 10K, 10K H, and 100K ECL compatible.

3. Between 10% and 90% (50% duty cycle) where t is the bit period in ns.

4. The transmitter is normally enabled and only requires an external voltage to disable.

5. Time measured from rising edge of disable signal until optical output (laser diode) has turned off.

6. Time measured from falling edge of enable signal until optical output has stabilized at nominal output power level.

7. The laser bias current is obtained by dividing the bias voltage by the 10 Ω current-sensing resistors. (See Figure 1.) When measuring these

voltages or using them in conjunction with alarm circuits, use a high-input impedance device.

8. The laser back-facet monitor voltage is a scaled output that tracks the transmitter optical output power.

Parameter Symbol Min Max Unit

Supply Voltage*——5.5V

Operating Case Temperature Range†TC–40 85 °C

Storage Case Temperature Range Tstg –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)

Parameter Symbol Min Typ Max Unit

Power Supply Voltage1V 4.75 5.0 5.50 V

Power Supply Current Drain ITOTAL —30130mA

Input Data Voltage:2

Low

High

VIL

VIH

–1.81

–1.16

—

–1.47

–0.88

Input Transition Time3tI—t/4—ns

Transmitter Disable Voltage4VDVCC – 2.0 — VCC V

Transmitter Enable Voltage VEN VEE —VEE + 0.8 V

Output Disable Time5tD— — 0.20 µs

Output Enable Time6tEN — — 2.00 µs

Laser Bias Voltage7VB0.01 0.06 0.70 V

Laser Monitor Voltage (50% duty cycle)8VBF 0.01 0.05 0.20 V

6For additional information and latest specifications, see our website: www.triquint.com

Data Sheet

February 2003 1241/1243/1245-Type Uncooled Laser Transmitters

Characteristics (continued)

Table 3. Optical Characteristics

1. Output power definitions and measurement per ITU-T Recommendation G.957 and G.958.

2. Ratio of logic 1 to logic 0 power levels.

3. Between 10% and 90% (50% duty cycle).

4. Root-mean-square spectral width accounts for modes up to and including those 20 dB down from the central mode.

(Applies to 1241-Type only.)

5. Applies to 1243/1245-Type only.

Recommended User Interfaces

1-496(C).c

* Locate these components as close to DATA/DATA inputs as possible.

Note: The 1241 gigabit version does not require the external 50 Ω terminations since this termination is included inside the module.

Figure 2. dc-Coupled, Differential Input

Parameter Symbol Min Typ Max Unit

Average Power Output Options1POSee Ordering Information. dBm

Extinction Ratio2rE10 — — dB

Optical Rise and Fall Times3:

OC-3/STM-1

OC-12/STM4

1062.5 Mb/s

tR, tF

—

1.0

0.5

0.37

Center Wavelength λSee Ordering Information. nm

RMS Spectral Width4∆λ —— 4nm

Side-mode Suppression Ratio5SMSR 30 — — dB

For additional information and latest specifications, see our website: www.triquint.com 7

Data Sheet

1241/1243/1245-Type Uncooled Laser Transmitters February 2003

Recommended User Interfaces (continued)

1-497(C)

Note: Input can also be connected to DATA; unused input pin remains unconnected.

(622 Mb/s and below only.)

Figure 3. dc-coupled, Single-Ended Input

1-498(C)

* This network introduces a slight offset between DATA and DATA, which turns the laser

transmitter off when there is no data present at the inputs. (622 Mb/s and below only.)

Figure 4. ac-Coupled, Single-Ended Input

Qualification and Reliability

To help ensure high product reliability and customer satisfaction, TriQuint is committed to an intensive quality pro-

gram that starts in the design phase and proceeds through the manufacturing process. Optoelectronics modules

are qualified to TriQuint internal standards using MIL-STD-883 test methods and procedures and using sampling

techniques consistent with Telcordia requirements. The 1241/1243/1245 series of transmitters have undergone an

extensive and rigorous set of qualification tests. This qualification program fully meets the intent of Telcordia reli-

ability practices TR-NWT-000468 and TA-NWT-000983. In addition, the design, development, and manufacturing

facility of the Optoelectronics unit at TriQuint Semiconductor has been certified to be in full compliance with the lat-

est ISO ®-9001 Quality System Standards.

8For additional information and latest specifications, see our website: www.triquint.com

Data Sheet

February 2003 1241/1243/1245-Type Uncooled Laser Transmitters

Outline Diagram

Dimensions are in inches and (millimeters). Unless otherwise noted, tolerances are ±0.005 in (±0.127 mm).

1-987C).a

For additional information and latest specifications, see our website: www.triquint.com 9

Data Sheet

1241/1243/1245-Type Uncooled Laser Transmitters February 2003

Laser Safety Information

Class I Laser Product

All versions of the 1241/1243/1245-Type transmitters are Class I laser products per CDRH, 21 CFR 1040 Laser

Safety requirements. The 1241/1243/1245-Type transmitters have been classified with the FDA under accession

number 8720009. All versions are Class I laser products per IEC ® 60825-1:1993.

CAUTION: Use of controls, adjustments, and procedures other than those specified herein may result in

hazardous laser radiation exposure.

This product complies with 21 CFR 1040.10 and 1040.11.

8.8 µm single-mode pigtail with connector

Wavelength = 1.3 µm

Maximum power = 1.6 mW

Notice

Unterminated optical connectors may emit laser radiation.

Do not view with optical instruments.

Table 4. TriQuint Transmitters for SONET/SDH Applications

* Full SONET/SDH compliance, –40 °C to +85 °C.

† Full SONET/SDH compliance, –20 °C to +70 °C.

Connector

Type

1.3 µm Transmitter Type*1.55 µm Transmitter Type†

Short and Intermediate Reach

(<2 km and ~15 km)

Long Reach

~40 km

Long Reach

~80 km

OC-3/

STM-1

OC-12/

STM-4

OC-3/

STM-1

OC-12/

STM-4

OC-3/

STM-1

OC-12/

STM-4

FC-PC 1241FAUC 1241FBUC 1243FAFD 1243FBDC 1245FAFC 1245FBDC

SC 1241CAUC 1241CBUC 1243CAFD 1243CBDC 1245CAFC 1245CBDC

Data Sheet

February 2003 1241/1243/1245-Type Uncooled Laser Transmitters

1010 For additional information and latest specifications, see our website: www.triquint.com

Ordering Information

Table 5. 1241/1243/1245-Type Transmitter Ordering Information

*∆λ for these codes is 2.5 nm maximum. All other 1241-type codes are 4 nm maximum.

OC-3/STM-1 Transmitter Codes

Operating

Case Temp.

Range (°C)

Average Output

Power

(dBM)

Center

Wavelength

(nm)

Connector 122x

Equivalent

Product

Order

Code

Comcode

Min Max Min Typ Max Min Max

0 65 –3 0 2 1290 1330 FC-PC 1227AE 1241FADC 108123449

0 65 –3 0 2 1290 1330 SC 1227AF 1241CADC 108123480

0 65 –5 –2 0 1280 1335 FC-PC 1227YA 1241FAFC 108123357

0 65 –5 –2 0 1280 1335 SC 1227YB 1241CAFC 108123373

0 65 –8 –5 –2 1260 1360 SC 1227CA 1241CALC 108123324

0 65 –8 –5 –2 1260 1360 FC-PC 1227C 1241FALC 108123563

–20 70 –5 –2 0 1480 1580 SC 1229CB5 1245CAFC 108400409

–20 70 –5 –2 0 1480 1580 FC-PC 1229FB5 1245FAFC 108400417

–40 85 –5 –2 0 1280 1335 SC 1227YD 1243CAFD 108123423

–40 85 –5 –2 0 1280 1335 FC-PC 1227YE 1243FAFD 108123415

–40 85 –12 –8 –5 1260 1360 SC 1227FB 1241CAPC 108123282

–40 85 –12 –8 –5 1260 1360 FC-PC 1227F 1241FAPC 108123266

–40 85 –15 –11 –8 1260 1360 SC 1227HA 1241CAUC*108123209

–40 85 –15 –11 –8 1260 1360 FC-PC 1227H 1241FAUC*108123159

OC-12/STM-4 Transmitter Codes

0 65 –3 0 2 1290 1330 FC-PC 1227AK 1241FBDC 108123456

0 65 –3 0 2 1290 1330 SC 1227AN 1241CBDC 108123498

0 65 –8 –5 –2 1260 1360 FC-PC 1227D 1241FBLC 108123316

–20 70 –3 0 2 1480 1580 SC 1229CA5 1245CBDC 108400391

–20 70 –3 0 2 1480 1580 FC-PC 1229FA5 1245FBDC 108400425

–40 85 –3 0 2 1280 1335 FC-PC 1229FA 1243FBDC 108123506

–40 85 –3 0 2 1280 1335 SC 1229CA 1243CBDC 108123522

–40 85 –12 –8 –5 1260 1360 FC-PC 1227G 1241FBPC 108123274

–40 85 –15 –11 –8 1260 1360 FC-PC 1227AC 1241FBUC*108123167

–40 85 –15 –11 –8 1274 1356 SC 1227PG 1241CBU*108123217

Fibre Channel—1062.5 Mb/s

10 65 –11 –8 –5 1260 1360 FC-PC 1238A 1241FCPC 108309287

10 65 –11 –8 –5 1260 1360 FC-PC 1238B 1241FCPD 108309295

10 65 –3 0 2 1290 1330 FC-PC 1238C 1241FCDC 108309279

Additional Information

For the latest specifications, additional product information, worldwide sales and distribution locations, and information about TriQuint:

Web: www.triquint.com Tel: (503) 615-9000

E-mail: info_opto@tqs.com Fax: (503) 615-8902

For technical questions and additional information on specific applications:

E-mail: info_opto@tqs.com

The information provided herein is believed to be reliable; TriQuint assumes no liability for inaccuracies or omissions. TriQuint assumes no responsibility for the use of this information, and all

such information shall be entirely at the user’s own risk. Prices and specifications are subject to change without notice. No patent rights or licenses to any of the circuits described herein are

implied or granted to any third party.

TriQuint does not authorize or warranty any TriQuint product for use in life-support devices and/or systems.

DS99-228 Revision 1.1, February, 2003

Data Sheet

February 2003 1241/1243/1245-Type Uncooled Laser Transmitters

Part Numbering for the 1241/1243/1245-Type Transmitter

1 2 4 X XXX X Field Description

Laser Type:

1 = 1.3 µm Fabry-Perot laser, 3 = 1.3 µm DFB laser, 5 = 1.55 µm DFB laser

Optical Connector:

C = SC, F = FC/PC

Data Rate:

A = 155 Mb/s, B = 622 Mb/s, C = 1062.5 Mb/s

Typical Power:

D = 0 dBm, F = –2 dBm, L = –5 dBm, P = –8 dBm, U = –11 dBm

Customer Options:

A—F

Table 6. Related Products

Description Device Number Document Number

155 Mb/s and 622 Mb/s for SONET/

SDH Applications

1340-Type Pin Receiver DS00-098

155 Mb/s and 622 Mb/s Receivers with

Clock and Data Recovery for SONET/

SDH Applications

1345-Type Pin Receiver with Clock and

Data Recovery

DS00-099

Telcordia Technologies is a trademark of Telcordia Technologies, Inc.

ISO is a registered trademark of The International Organization for Standardization.

IEC is a registered trademark of The International Electrotechnical Commission.