Optoway
BTR-7940G / BTR-7940-SPG
FEATURES
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BTR-7940G
1
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1490 nm TX / 1310 nm RX , 3.3V / 1.25 Gb/s
RoHS Compliant
Single-Fiber Transceiver
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DESCRIPTION
Bi-Directional Single-Fiber Transceiver
14910 nm DFB LD Transmitter
1310 nm Receiver
20 dB Power Budget At Least
Link distance up to 40 km
Industry Standard 1 x 9 Footprint
Single +3.3 V Power Supply
RoHS Compliant
0 to 70
o
C Operating
LVPECL Differential Inputs and Outputs
LVPECL Signal Detect Output: BTR-7940G
LVTTL Signal Detect Output: BTR-7940CG
Wave Solderable and Aqueous Washable
Class 1 Laser International Safety Standard IEC- 60825
Compliant
The BTR-7940G 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 1490 nm DFB 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 and ITU-T 983.3 application. 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 1.25 Gb/s Links
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SONET/SDH Equipment Interconnect
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Fibre Channel 1.063 Gb/s Links
ORDER INFORMATION
P/No.
1000
BASE
BX
Bit Rate Distance
(Gb/s)
(km)
1.25
40
TX
(nm)
1490 DFB
RX
(nm)
1310
Voltage
(V)
3.3
Package
Temp
(
o
C)
0 to 70
TX
RX Sens.
RoHS
Power
(dBm) Compliant
(dBm)
2 to -3
-23
Yes
BTR-7940G
1X9
Note: 1. BTR-XXXXG is 1X9 SC receptacle type package.
2. BTR-XXXX-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.
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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
10/1/2005 V2.0
Optoway
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
0
GND
0
Max
85
70
260
3.6
Vcc
30
Units
o
C
o
C
o
C
V
V
mA
BTR-7940G
Notes
air flow 1m/sec
10 seconds on leads only
2
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Recommended Operating Conditions
Parameter
Power Supply Voltage
Operating Temperature
Data Rate
Power Supply Current
Symbol
Vcc
Topr
Icc
Min
3.13
0
Typ
3.3
1250
Max
3.47
70
1300
280
Units / Notes
V
o
C / Air flow 1m/sec
Mb/s
mA
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
Side Mode Suppression Ratio
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
Symbol
Min
Typ
---
---
---
Max
2
1500
1
---
0.26
0.26
-120
0.227
Units
dBm
nm
nm
dB
dB
ns
ns
dB/Hz
ns
µA
µA
mV
V
V
Notes
1
-20 dB Width
Po
-3
1480
λ
---
∆λ
SMSR
30
E
R
9.0
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
-350
20% to 80% Values
20% to 80% Values
2
350
300
-2.0
-1.1
-1.58
-0.74
3
3
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.
***********************************************************************************************************************************************************************
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
10/1/2005 V2.0
Optoway
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
SD Output Voltage -- Low
SD Output Voltage -- High
Symbol
---
Pin
Pa
Pd
Min
---
-3
---
-40
1.0
1260
14
-2.0
-1.1
-2.0
-1.1
0
2.0
Typ
---
---
---
---
---
Max
-23
---
-23
---
1360
Units
dBm
dBm
dBm
dBm
dB
nm
dB
V
V
V
V
V
V
BTR-7940G
Notes
1
Transition: low to high
Transition: high to low
2
3
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ORL
V
OL
- V
CC
V
OH
- V
CC
V
OL
- V
CC
V
OH
- V
CC
V
OL
V
OH
-1.58
-0.74
-1.58
-0.74
0.8
Vcc+0.3
3
3
BTR-7940G
BTR-7940CG
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 1580 nm.
3. These outputs are compatible with 10K, 10KH and 100K ECL and LVPECL outputs.
CONNECTION DIAGRAM
Receiver Signal Ground 1 (Rx GND)
Receiver Data Out 2 (RD+)
Receiver Data Out Bar 3 (RD−)
Signal Detect 4 (SD)
Receiver Power Supply 5 (Rx Vcc)
Transmitter Power Supply 6 (Tx Vcc)
Transmitter Data In Bar 7 (TD−)
Transmitter Data In 8 (TD+)
Transmitter Signal Ground 9 (Tx GND)
N/C
TOP VIEW
N/C
PIN
1
2
3
4
5
6
7
8
9
Symbol
Rx GND
RD+
RD−
SD
Rx Vcc
Tx Vcc
TD−
TD+
Tx GND
Notes
Directly connect this pin to the receiver ground plane
See recommended circuit schematic
See recommended circuit schematic
Active high on this indicates a received optical signal
+3.3V dc power for the receiver section
+3.3V dc power for the transmitter section
See recommended circuit schematic
See recommended circuit schematic
Directly connect this plan to the trransmitter ground plane
***********************************************************************************************************************************************************************
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
10/1/2005 V2.0
Optoway
RECOMMENDED CIRCUIT SCHEMATIC
Vcc3.3V
Vcc3.3V
R3
NA
R2
NA
C9
100nF
C10
100nF
L2
1uH
U2
TXGND
TD+
TD-
TXVCC
RXVCC
SD
RD-
RD+
RXGND
9
8
7
6
5
4
3
2
1
C2
100nF
L1
1uH
C3
100nF
C4
10uF
Vcc3.3V
MICROSTRIP5
Z=50R
MICROSTRIP6
Z=5OR
TD-
BTR-7940G
4
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Vcc3.3V
LVPECL
TD+
R4
NA
R1
NA
PHY DEVICE
C1
100nF
C8
10uF
RD+
Vcc3.3V
C12
R21
1K
100nF
MICROSTRIP7
Z=50R
MICROSTRIP8
SD / LVPECL
R14
100R
RD-
LVPECL
C11 100nF Z=5OR
The split-load terminations for ECL signals need to be located at the input of devices receiving those ECL signals. The power supply
filtering is required for good EMI performance. Use short tracks from the inductor L1/L2 to the module Rx Vcc and Tx Vcc. A GND plane
under the module is required for good EMI and sensitivity performance.
PACKAGE DIAGRAM
Units in mm
1) Pigtail Type
BTR-7940-SP50G / BTR-7940C-SP50G
Note: Length L is 50± 3 cm. Other pigtail’s length is available upon request.
***********************************************************************************************************************************************************************
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
10/1/2005 V2.0
Optoway
2) Receptacle Type
BTR-7940G
5
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BTR-7940G / BTR-7940CG
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
10/1/2005 V2.0
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