
Optoway                                            
BTR-7740G
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BTR-7740G / BTR-7740-SPG 
1550 nm  TX / 1310 nm RX , 3.3V / 1.25 Gb/s 
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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20 dB Link Power Budget At Least 
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Link 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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0 to 70
o
C Operating 
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LVPECL Differential Inputs and Outputs 
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LVPECL Signal Detect Output: BTR-7740G 
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LVTTL Signal Detect Output: BTR-7740CG 
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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 1.25 Gb/s Links 
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SONET/SDH Equipment Interconnect 
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Fiber Channel 1.063 Gb/s Links 
ORDER INFORMATION 
P/No.
Bit 
Rate 
(Gb/s)
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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  V2.0 
1 
DESCRIPTION 
The BTR-7740G 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 1550 nm 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. 
Distance 
(km) 
TX 
(nm) 
RX 
(nm) 
Voltage 
(V) 
Package 
Temp 
(
o
C) 
TX 
Power 
(dBm) 
2 to -3 
2 to -3 
RX 
Sens. 
(dBm) 
-23 
-23 
Signal 
Detect 
RoHS 
Compliant 
BTR-7740CG 
BTR-7740G 
Note: 1. BTR-XXXXXG is 1X9 SC receptacle type package. 
          2. BTR-XXXXX-APBBBG 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 
Soldering Temperature 
--- 
Power Supply Voltage 
Vcc 
0 
Input Voltage 
--- 
GND 
Output Current 
Iout 
0 
Recommended Operating Conditions 
Parameter 
Symbol 
Min 
Power Supply Voltage 
Vcc 
3.13 
Operating Temperature 
Topr 
0 
Data Rate 
Power Supply Current 
Icc 
1.25 
1.25 
40 
40 
1550 DFB 
1550 DFB 
1310 
1310 
3.3 
3.3 
1X9  
1X9  
0 to 70 
0 to 70 
TTL 
PECL 
Yes 
Yes 
Max 
85 
70 
260 
4.5 
Vcc 
30 
Units 
o
C 
o
C 
o
C 
V 
V 
mA 
Notes 
10 seconds on leads only 
Typ 
3.3 
1250 
Max 
3.47 
70 
1300 
280 
Units 
V 
o
C 
Mb/s 
mA