Optoway
CONNECTION DIAGRAM
Receiver Signal Ground
Receiver Data Out
Receiver Data Out Bar
Signal Detect
Receiver Power Supply
Transmitter Power Supply
Transmitter Data In Bar
Transmitter Data In
Transmitter Signal Ground
1 (Rx GND)
2 (RD+)
3 (RD−)
4 (SD)
5 (Rx Vcc)
6 (Tx Vcc)
7 (TD−)
8 (TD+)
9 (Tx GND)
N/C
BTR-7780-1590G
3
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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
RECOMMENDED CIRCUIT SCHEMATIC
Vcc3.3V
Vcc3.3V
R3
NA
R2
NA
C9
100nF
C10
100nF
L2
1uH
Vcc3.3V
MICROSTRIP5
Z=50R
MICROSTRIP6
Z=5OR
TD-
Vcc3.3V
LVPECL
TD+
R4
NA
R1
NA
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
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.
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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 [ OPTOWAY TECHNOLOGY INC ]
