
BTR-3740G
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BTR-3740G / BTR-3740-SPG / BTR-3740AG / BTR-3740A-SPG 
1550 nm TX / 1310 nm RX , 3.3V / 155 Mbps 
RoHS Compliant
 Single-Fiber Transceiver 
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FEATURES 
l
Single Fiber  Bi-Directional Transceiver 
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1550 nm DFB LD Transmitter 
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1310 nm Receiver 
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Distance Up to 40 km 
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Industry Standard 1 x 9 Footprint 
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Single +3.3 V Power Supply 
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RoHS Compliant 
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PECL Differential Inputs and Outputs 
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0 to 70
o
C Operating Temperature: BTR-3740G 
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-20 to 85
o
C Operating Temperature: BTR-3740AG 
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Wave Solderable and Aqueous Washable 
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Class 1 Laser International Safety Standard IEC-60825 
Compliant 
APPLICATIONS 
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WDM 155 Mb/s Links 
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SONET/SDH Equipment Interconnect 
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Fast Ethernet 100 Mb/s Links 
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OPTOWAY TECHNOLOGY INC.  
No
.3
8, Kuang Fu S. Road, Hu Kou, Hsin Chu Industrial Park, Hsin Chu, Taiwan 303 
                            Tel: 886-3-5979798                       Fax: 886-3-5979737 
                            E-mail: sales@optoway.com.tw    http: // www.optoway.com.tw 
10/1/2005 V3.0
1 
DESCRIPTION 
The BTR-3740G series is high performance module for 
single fiber communications by using 1550 nm transmitter 
and 1310 nm receiver. The transmitter  section  uses  a  
multiple  quantum well DFB laser  and is a class 1 laser 
compliant according to International Safety Standard 
IEC-60825. The receiver section uses an integrated 1310 
nm detector preamplifier (IDP) mounted in an optical 
header and a limiting post-amplifier IC. A PECL logic 
interface simplifies interface to external circuitry. 
LASER SAFETY
This single mode transceiver is a Class 1 laser product. It 
complies with IEC-60825 and FDA 21 CFR 1040.10 and 
1040.11.  The transceiver must be operated within the 
specified temperature and voltage limits. The optical ports 
of the module shall be terminated with an optical connector 
or with a dust plug. 
ORDER INFORMATION 
P/No.
Bit Rate 
(Mb/s)
Distance 
(km) 
TX 
(nm) 
RX 
(nm) 
Voltage 
(V) 
Package 
Temp 
(
o
C) 
TX 
Power 
(dBm) 
-3 to -8 
RX Sens. 
(dBm) 
RoHS 
Compliant 
BTR-3740G 
BTR-3740AG 
Note: 1. BTR-XXXXXG is 1X9 SC receptacle type package. 
          2. BTR-XXXXX-XPBBBG is 1X9 pigtail type package with different connector, A=S is SC connector, A=F is FC 
connector, A=T is ST connector, A=L is LC connector, A=M is MU connector; BBB is the length of fiber in cm. 
Absolute Maximum Ratings 
Parameter 
Symbol 
Min 
Storage Temperature 
Tstg 
-40 
Operating Temperature 
Topr 
0 
-20 
Soldering Temperature 
--- 
Power Supply Voltage 
Vcc 
0 
Input Voltage 
--- 
GND 
Output Current 
Iout 
0 
Recommended Operating Conditions 
Parameter 
Symbol 
Min 
Power Supply Voltage 
Vcc 
3.135 
Operating Temperature 
Topr 
0 
-20 
Data Rate 
Power Supply Current 
Icc 
125/155 
125/155 
40 
40 
1550 DFB 
1550 DFB 
1310 
1310 
3.3 
3.3 
1X9 
1X9 
0 to 70 
-20 to 85 
-3 to -8 
-33 
-33 
Yes 
Yes 
Max 
85 
70 
85 
260 
4.5 
Vcc 
30 
Units 
o
C 
o
C 
Notes 
BTR-3740G 
BTR-3740AG 
o
C 
V 
V 
mA 
10 seconds on leads only 
Typ 
3.3 
Max 
3.465 
70 
85 
 170 
260 
Units 
V 
o
C / BTR-3740G 
o
C / BTR-3740AG 
Mb/s 
mA 
155