Optoway
FEATURES
DESCRIPTION
BTRS-3720G
1
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BTRS-3720G / BTRS-3720-SPG / BTRS-3720AG / BTRS-3720A-SPG
1550 nm TX / 1310 nm RX , 3.3V / 155 Mbps
RoHS Compliant
SFF Single-Fiber Transceiver
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Single Fiber SFF Bi-Directional Transceiver
1550 nm Transmitter
1310 nm Receiver
Distance Up to 20 km
Single +3.3 V Power Supply
RoHS Compliant
PECL Differential Inputs and Outputs
0 to 70
o
C Operating Temperature: BTRS-3720G
-20 to 85
o
C Operating Temperature: BTRS-3720AG
Wave Solderable and Aqueous Washable
Class 1 Laser International Safety Standard IEC-60825
Compliant
The BTRS-3720G 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 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.
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
ORDER INFORMATION
P/No.
Bit Rate
(Mb/s)
125/155
125/155
Distance
(km)
20
20
TX
(nm)
1550
1550
RX
(nm)
1310
1310
Voltage
(V)
3.3
3.3
Package
Temp
(
o
C)
0 to 70
-20 to 85
TX
RX Sens. RoHS
Power
(dBm) Compliant
(dBm)
-8 to -14
-33
Yes
-8 to -14
-33
Yes
BTRS-3720G
BTRS-3720AG
2X5 SC
2X5 SC
Note: 1. BTRX-XXXXXG is receptacle type package with standard case
2. BTRX-XXXXXEG is receptacle type package with extended case
3. BTRX-XXXXX-APBBBG is 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
Storage Temperature
Operating Temperature
Soldering Temperature
Power Supply Voltage
Input Voltage
Output Current
Symbol
Tstg
Topr
---
Vcc
---
Iout
Min
-40
0
-20
0
GND
0
Max
85
70
85
260
4.5
Vcc
30
Units
o
C
o
C
o
Notes
BTRS-3720G
BTRS-3720AG
10 seconds on leads only
C
V
V
mA
Recommended Operating Conditions
Parameter
Power Supply Voltage
Operating Temperature
Data Rate
Power Supply Current
Symbol
Vcc
Topr
Min
3.13
0
-20
Typ
3.3
Max
3.47
70
85
170
260
Units / Notes
V
o
C / BTRS-3720G
o
C / BTRS-3720AG
Mb/s
mA
155
Icc
***********************************************************************************************************************************************************************
OPTOWAY TECHNOLOGY INC.
No.38, 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
10/1/2009 V4.0
Optoway
Transmitter Specifications (0
o
C < Topr < 70
o
C, 3.13V < Vcc < 3.47V)
Parameter
Optical
Optical Transmit Power
Output Center Wavelength
Output Spectrum Width
Extinction Ratio
Output Eye
Optical Rise Time
Optical Fall Time
Relative Intensity Noise
Total Jitter
Electrical
Data Input Current
–
Low
Data Input Current
–
High
Differential Input Voltage
Data Input Voltage
–
Low
Data Input Voltage -- High
Disable Input Voltage -- Low
Disable Input Voltage -- High
Shut Off Time for TxDis
Symbol
Min
Typ
Max
Units
BTRS-3720G
Notes
2
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Po
-14
-8
dBm
1
1480
1580
nm
λ
3
nm
RMS (σ)
σ
λ
E
R
8.2
dB
Compliant with Bellcore TR-NWT-000253 and ITU recommendation G.957
t
r
2
ns
10% to 90% Values
t
f
2
ns
10% to 90% Values
RIN
-116
dB/Hz
TJ
1
ns
2
I
IL
I
IH
V
IH
- V
IL
V
IL
- V
CC
V
IH
- V
CC
V
TDIS,L
V
TDIS,H
t
DIS
-350
300
-2.0
-1.1
0
Vcc
–
1.3
350
1600
-1.58
-0.74
0.8
Vcc
1
µA
µA
mV
V
V
V
V
ms
3
3
TX Output Enabled
TX Ouput Disabled
Notes: 1. Output power is power coupled into a 9/125
µm
single mode fiber.
2. Measured with a 2
23
-1 PRBS with 72 ones and 72 zeros.
3. These inputs are compatible with 10K, 10KH and 100K ECL and LVPECL inputs.
Receiver Specifications (0
o
C < Topr < 70
o
C, 3.13 V < Vcc < 3. 47V)
Parameter
Optical
Sensitivity
Maximum Input Power
Signal Detect -- Asserted
Signal Detect -- Deasserted
Signal detect -- Hysteresis
Wavelength of Operation
Optical Return Loss
Electrical
Data Output Voltage
–
Low
Data Output Voltage
–
High
SD Output Voltage -- Low
SD Output Voltage -- High
Signal Detect Assert Time
Signal Detect Deassert Time
Symbol
---
Pin
Pa
Pd
Min
---
-3
---
-42
1.0
1260
14
-2.0
-1.1
-2.0
-1.1
Typ
---
---
---
---
---
Max
-33
---
-33
---
4.0
1360
Units
dBm
dBm
dBm
dBm
dB
nm
dB
V
V
V
V
µs
µs
Notes
1
Transition: low to high
Transition: high to low
2
ORL
V
OL
- V
CC
V
OH
- V
CC
V
OL
- V
CC
V
OH
- V
CC
AS
MAX
ANS
MAX
-1.58
-0.74
-1.58
-0.74
100
300
3
3
3
3
OFF to ON
ON to OFF
Notes: 1. Minimum sensitivity and saturation levels at BER 1E-10 for a 2
23
-1 PRBS with 72 ones and 72 zeros.
2. At least 30 dB optical isolation for the wavelength 1260 to 1360 nm.
3. These outputs are compatible with 10K, 10KH and 100K ECL and LVPECL outputs.
*********************************************************************************************************************************************************************
OPTOWAY TECHNOLOGY INC.
No.38, 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
10/1/2009 V4.0
Optoway
CONNECTION DIAGRAM
BTRS-3720G
3
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Symbol
PIN
1
2
3
4
5
6
7
8
9
10
MS
V
EE
r
V
CC
r
SD
RD−
RD+
V
CC
t
V
EE
t
TxDis
TD+
TD-
MS
Notes
Directly connect this pin to the receiver ground plane
+3.3V dc power for the receiver section
Active high on this indicates a received optical signal.
Receiver Dataout Bar. See recommended circuit schematic
Receiver Dataout. See recommended circuit schematic
+3.3V dc power for the transmitter section
Directly connect this plan to the transmitter ground plane
Transmitter Disable. Connect this pin to +3.3V TTL logic
“1”
to disable module
To enable module connect to TTL logic low
“0”
Transmitter Data In. See recommended circuit schematic
Transmitter Data In Bar. See recommended circuit schematic
Mounting Studs. Connect to Chassis Ground
*********************************************************************************************************************************************************************
OPTOWAY TECHNOLOGY INC.
No.38, 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
10/1/2009 V4.0
Optoway
RECOMMENDED CIRCUIT SCHEMATIC
1) Recommended DC Coupled Interface Circuit
PHY DEVICE
Vcc3.3V
BTRS-3720G
4
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MICROSTRIP1
terminate in transceiver inputs
100R
Z=50R
MICROSTRIP2
Z=5OR
L1
10
9
8
7
6
1uH
C1
TD-
TD+
TDis
Veet
Vcct
10nF
U1
SFF2X5
Veer
Vccr
SD
RD-
RD+
C2
10uF
C5
10nF
L2
1uH
C6
10uF
R3
130R
Vcc3.3V
R4
130R
TD-
LVPECL
TD+
TDis(LVTTL)
C3
1
2
3
4
5
10nF
C4
Terminate at device input
10uF
RD+
Vcc3.3V
MICROSTRIP3
Z=50R
MICROSTRIP4
Z=5OR
R1
150R
R2
150R
R5
100R
LVPECL
RD-
Vcc3.3V
R6
130R
SD
R7
82R
2) Recommended AC Coupled Interface Circuit
Terminate in Tranceiver inputs
Vcc3.3V
PHY DEVICE
R8
82R
R9
82R
R10
130R
R11
130R
Vcc3.3V
C7
100nF
C8
100nF
MICROSTRIP5
Z=50R
MICROSTRIP6
Z=5OR
R14
130R
Vcc3.3V
R15
130R
TD-
LVPECL
TD+
TDis(LVTTL)
L3
10
9
8
7
6
1uH
C9
TD-
TD+
TDis
Veet
Vcct
10nF
U2
SFF2X5
Veer
Vccr
SD
RD-
RD+
C10
10uF
C15
10nF
L4
1uH
C16
10uF
Vcc3.3V
C11
1
2
3
4
5
10nF
C12
10uF
R16
130R
RD+
Vcc3.3V
Vcc3.3V
C13
100nF
C14
100nF
R12
150R
R13
150R
MICROSTRIP7
Z=50R
MICROSTRIP8
Z=5OR
Vcc3.3V
R17
82R
R18
130R
RD-
LVPECL
R19
82R
R20
130R
SD
R21
82R
*********************************************************************************************************************************************************************
OPTOWAY TECHNOLOGY INC.
No.38, 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
10/1/2009 V4.0
Optoway
PACKAGE DIAGRAM
Units in mm
1) SC Receptacle
BTRS-3720G
5
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A) Standard Case
BTRS-3720G / BTRS-3720AG
B) Extended Case
BTRS-3720EG / BTRS-3720AEG
*********************************************************************************************************************************************************************
OPTOWAY TECHNOLOGY INC.
No.38, 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
10/1/2009 V4.0
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