BTR-7740G Datasheet, PDF (3/4 Pages) Optoway Technology Inc – 1550 nm TX / 1310 nm RX , 3.3V / 1.25 Gb/s RoHS Compliant Single-Fiber Transceiver

Optoway
3
BTR-7740G
***********************************************************************************************************************************************************************
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)
TOP VIEW
N/C
N/C
PIN
Symbol
Notes
1
Rx GND
Directly connect this pin to the receiver ground plane
2
RD+
See recommended circuit schematic
3
RD−
See recommended circuit schematic
4
SD
Active high on this indicates a received optical signal
5
Rx Vcc
+3.3V dc power for the receiver section
6
Tx Vcc
+3.3V dc power for the transmitter section
7
TD−
See recommended circuit schematic
8
TD+
See recommended circuit schematic
9
Tx GND
Directly connect this plan to the trransmitter ground plane
RECOMMENDED CIRCUIT SCHEMATIC
Vcc3.3V
Vcc3.3V
U2
TXGND
TD+
TD-
TXVCC
RXVCC
SD
RD-
RD+
RXGND
9
8
7
6
5
4
3
2
1
BTR-77XX(C)/76XX(C)
R3
NA
R2
NA
C9
MICROSTRIP5
100nF Z=50R
R4
NA
R1
C10
MICROSTRIP6
NA
100nF Z=5OR
L2
1uH
C2
100nF
L1
1uH
Vcc3.3V
C3
100nF
C4
10uF
C1 C8
100nF _10uF
Vcc3.3V
TD-
LVPECL
TD+
PHY DEVICE
Vcc3.3V
RD+
C12 ^MICROSTRIP7
100nF Z=50R
R21
MICROSTRIP8
1K
C11 100nF Z=5OR
SD / LVPECL
R14
100R
RD-
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.
***********************************************************************************************************************************************************************
OPTOWAY TECHNOLOGY INC. No.38, Kuang Fu S. Road, Hu Kou, Hsin Chu Industrial Park, Hsin Chu, Taiwan 303
Tel: [phone]
Fax: [phone]
E-mail: [e-mail] http: // www.optoway.com.tw 10/1/2005 V2.0