
Optoway                          
BTRS-7740CG
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BTRS-7740CG / BTRS-7740ACG 
1550 nm  TX  / 1310 nm RX , 3.3V / 1250 Mbps 
RoHS Compliant
 Single-Fiber Transceiver 
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FEATURES 
l
Single Fiber  Bi-Directional Transceiver 
l
1550 nm DFB LD Transmitter 
l
1310 nm Receiver 
l
20 dB Link Power Budget At Least 
l
Distance Up to 40 km 
l
Single +3.3 V Power Supply 
l
RoHS Compliant 
l
0 to 70
o
C Operating: BRS-7740CG 
l
-20 to 85
o
C Operating: BRS-7740ACG 
l
Speed up to  1300 Mbps 
l
LVTTL Signal Detect Output  
l
PECL Differential Inputs and Outputs 
l
Wave Solderable and Aqueous Washable 
l
Class 1 Laser International Safety Standard IEC-60825 
Compliant 
APPLICATIONS 
l
WDM Gigabit Ethernet  Links 
l
SONET/SDH Equipment Interconnect 
l
Fiber Channel Links 
ORDER INFORMATION 
P/No.
Bit Rate 
(Gb/s)
(km) 
(nm) 
(nm) 
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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 BTRS-7740CG 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. LV-TTL 
Signal Detect is used. 
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 
TX 
RX 
Voltage 
(V) 
Package 
Temp 
(
o
C) 
TX 
Power 
(dBm) 
2 to -3 
2 to -3 
RX Sens. 
(dBm) 
RoHS 
Compliant 
BTRS-7740CG 
BTRS-7740ACG 
Note: 1. BTRS-XXXXXG is SFF SC receptacle type package. 
          2. BTRS-XXXXX-APBBBG is SFF 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 
3.13 
Operating Temperature 
Topr 
0 
-20 
Data Rate 
Power Supply Current 
Icc 
1.25
1.25
40 
40 
1550 DFB 
1550 DFB 
1310 
1310 
3.3 
3.3 
SC, 2X5 
SC, 2X5 
-20 to 85 
0 to 70 
-23 
-23 
Yes 
Yes 
Max 
85 
70 
85 
260 
3.6 
Vcc 
30 
Units 
o
C 
o
C 
Notes 
BTRS-7740CG/ air flow 1m/sec 
BTRS-7740ACG/air flow 1m/sec
10 seconds on leads only 
o
C 
V 
V 
mA 
Typ 
3.3 
Max 
3.47 
70 
85 
1300 
280 
Units / Notes 
V 
o
C  / BTRS-7740CG 
o
C  / BTRS-7740ACG 
Mb/s 
mA 
1250