
Optoway                          
BTRS-77120C-1510G 
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BTRS-77120C-1510G 
1510 nm  TX / 1590 nm RX , 3.3V / 1250 Mbps 
RoHS Compliant
 Single-Fiber Transceiver 
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FEATURES 
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Single Fiber  Bi-Directional Transceiver 
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1510 nm DFB LD Transmitter 
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1590 nm Receiver 
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31 dB Power Budget at Least 
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Distance Up to 120 km 
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0 to 70
o
C Operating 
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Speed up to  1300 Mbps 
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LVTTL Signal Detect Output 
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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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Wave Solderable and Aqueous Washable 
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Class 1 Laser International Safety Standard IEC 60825 
Compliant 
APPLICATIONS 
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WDM Gigabit Ethernet  Links 
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SONET/SDH Equipment Interconnect 
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Fiber Channel 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  V2.0 
1 
DESCRIPTION 
The BTRS-77120C-1510G series is high performance 
module for single fiber communications by using 1510 nm 
transmitter and 1590 nm receiver. A guaranteed minimum 
optical link budget of 31 dB is offered which can correspond 
to a link distance of over  120 km (assuming worst case fiber 
loss of  0.22 dB/km). The transmitter  section  uses  a  
multiple  quantum well  1510 nm DFB laser  and is a class 1 
laser compliant according to International Safety Standard 
IEC 60825. The receiver section uses an integrated 1590 nm 
detector preamplifier (IDP) mounted in an optical header 
and a limiting post-amplifier IC. A PECL logic interface 
simplifies interface to external circuitry. Signal Detect with 
LC-TTL 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. 
ORDER INFORMATION 
P/No.
Bit Rate 
(Gb/s)
Distance 
(km) 
TX 
(nm) 
RX 
(nm) 
Voltage 
(V) 
Package 
Temp 
(
o
C) 
TX 
Power 
(dBm) 
3 to -2 
RX Sens. 
(dBm) 
RoHS 
Compliant 
BTRS-77120C-1510G 
Note: 1. BTRS-XXXXX is SFF SC receptacle type package. 
          2. BTRS-XXXXX-APBBB 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 
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
120 
1510 DFB 
1590 
3.3 
SC, 2X5 
0 to 70 
-33 
Yes 
Max 
85 
70 
260 
4.5 
Vcc 
30 
Units 
o
C 
o
C 
o
C 
V 
V 
mA 
Notes 
Air flow 1m/sec 
10 seconds on leads only 
Typ 
3.3 
1250 
Max 
3.47 
70 
1300 
280 
Units / Notes 
V 
o
C  / air flow 1m/sec 
Mb/s 
mA