Optoway
FEATURES
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BTRS-7920CG
1
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BTRS-7920CG / BTRS-7920C-SPG / BTRS-7920ACG / BTRS-7920AC-SPG
1490 nm TX/ 1310 nm RX , 3.3V / 1250 Mbps
RoHS Compliant
Single-Fiber Transceiver
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DESCRIPTION
Bi-Directional Single-Fiber Transceiver
Compliant with IEEE 802.3ah 1000BASE-BX
1490 nm DFB LD Transmitter
1310 nm Receiver
14 dB Power Budget At Least
Link distance up to 20 km
Single +3.3 V Power Supply
RoHS Compliant
0 to 70
o
C Operating: BTRS-7920CG
-20 to 85
o
C Operating: BTRS-7920ACG
LVPECL Differential Inputs and Outputs
LVTTL Signal Detect Output
Wave Solderable and Aqueous Washable
Class 1 Laser International Safety Standard IEC-60825
Compliant
The BTRS-7920CG series is high performance module for
single fiber communications by using 1490 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 is designed to receive 1310 nm and block
1490 nm signal. This feature is suitable for IEEE 802.3ah
1000BASE-BX and ITU-T 983.3 application. A PECL logic
interface simplifies interface to external circuitry. LVTTL
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.
APPLICATIONS
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WDM Gigabit Ethernet Links
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SONET/SDH Equipment Interconnect
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Fiber Channel Links
ORDER INFORMATION
P/No.
Bit Rate Distance
IEEE
(Gb/s)
802.3ah
(km)
1000BASE
BX
BX
1.25
1.25
20
20
TX
(nm)
1490 DFB
1490 DFB
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)
-3 to -8
-3 to -8
-22
-22
Yes
Yes
BTRS-7920CG
BTRS-7920ACG
SC, 2X5
SC, 2X5
Note: 1. BTRS-XXXXXG is SC/PC receptacle type package with standard case
2. BTRS-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
3.6
Vcc
30
Units
o
C
o
C
o
Notes
BTRS-7920CG
BTRS-7920ACG/air flow 1m/sec
C
V
V
10 seconds on leads only
mA
Recommended Operating Conditions
Parameter
Power Supply Voltage
Operating Temperature
Symbol
Vcc
Topr
Min
3.13
0
Typ
3.3
Max
3.47
70
Units / Notes
V
o
C / BTRS-7920CG
***********************************************************************************************************************************************************************
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 V3.0
Optoway
-20
Data Rate
Power Supply Current
1250
Icc
85
1300
280
o
BTRS-7920CG
C / BTRS-7920ACG
air flow 1m/sec
Mb/s
mA
2
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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
-3
1500
1
Units
dBm
nm
nm
dB
ns
ns
dB/Hz
ns
µA
µA
mV
V
V
V
V
ms
Notes
1
-20 dB Width
Po
-8
1480
λ
σ
λ
E
R
9
Compliant with IEEE 802.3z
t
r
t
f
RIN
TJ
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
0.26
0.26
-120
0.227
20% to 80% Values
20% to 80% Values
2
350
1600
-1.58
-0.74
0.8
Vcc
1
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
7
-1 PRBS.
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 Swing
SD Output Voltage -- Low
SD Output Voltage -- High
Signal Detect Assert Time
Signal Detect Deassert Time
Symbol
---
Pin
Pa
Pd
Min
---
-3
---
-31
1.0
1260
20
0.575
0
2.0
Typ
---
---
---
---
---
Max
-22
---
-22
---
1360
Units
dBm
dBm
dBm
dBm
dB
nm
dB
V
V
V
µs
µs
Notes
1
Transition: low to high
Transition: high to low
2,3
ORL
V
OH
–
V
OL
V
OL
V
OH
AS
MAX
ANS
MAX
0.930
0.8
Vcc+0.3
100
300
OFF to ON
ON to OFF
Notes: 1. Minimum sensitivity and saturation levels at BER 1E-12 for a 2
7
-1 PRBS.
2. At least 30 dB optical isolation for the wavelength 1480 to 1500 nm.
3. At least 30 dB optical isolation for the wavelength 1550 to 1600 nm.
***********************************************************************************************************************************************************************
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 V3.0
Optoway
CONNECTION DIAGRAM
BTRS-7920CG
3
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PIN
1
2
3
4
5
6
7
8
9
10
MS
Symbol
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
RECOMMENDED CIRCUIT SCHEMATIC
depend on customer's PHY
terminate and bias inside Transceiver module
TD-
Z=50R
LVPECL
Vcc3.3V
TD+
Z=5OR
130R
10
9
8
7
6
TXDis(LVTTL)
130R
1uH
Vcc3.3V
TD-
TD+
TDis
Veet
Vcct
10nF
10uF
1uH
10nF
10uF
PHY DEVICE
BTRS-7XXXC
1
2
3
4
5
10nF
10uF
Vcc3.3V
Veer
Vccr
SD
RD-
RD+
RD+
100R
Z=50R
LVPECL
RD-
Z=5OR
depend on customer's PHY
SD
TO LVTTL STAGE
***********************************************************************************************************************************************************************
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 V3.0
Optoway
PACKAGE DIAGRAM
Units in mm
1) SC Receptacle
BTRS-7920CG
4
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A) Standard Case
BTRS-7920CG / BTRS-7920ACG
B) Extended Case
BTRS-7920CEG / BTRS-7920ACEG
***********************************************************************************************************************************************************************
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 V3.0
Optoway
2) Pigtail
BTRS-7920CG
5
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BTRS-7920C-SP50G / BTRS-7920AC-SP50G
Note: Length L is 50± 3 cm. Other pigtail’s length is available upon request.
Note:
Specifications subject to change without notice.
***********************************************************************************************************************************************************************
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 V3.0
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