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
BTR-77XX(C)/76XX(C)
9
8
7
6
5
4
3
2
1
C2
100nF
L1
1uH
PHY DEVICE
C3
100nF
C4
10uF
Vcc3.3V
MICROSTRIP5
Z=50R
MICROSTRIP6
Z=5OR
TD-
LVPECL
TD+
BTR-7720G
4
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Vcc3.3V
R4
NA
R1
NA
C1
100nF
C8
10uF
RD+
Vcc3.3V
C12
100nF
R21
1K
MICROSTRIP7
Z=50R
MICROSTRIP8
R14
100R
RD-
LVPECL
C11 100nF Z=5OR
SD / LVPECL
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-7720-SP50G / BTR-7720A-SP50G
Note: Length L is 50± 3 cm. Other pigtail’s length is available upon request.
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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