5 / 7 page
HG Genuine
GBIC Transceiver
MGB-243S
Figure 3: Receiver Eye Diagram
Figure4: Transmitter Eye Diagram
Note: measured with a 2
7-1 PRBS test pattern @1.25Gbps
Interface Circuit
Figure 5 shows the recommended interface circuit for GBIC application.
Laser
driver
Amplifier
EEPROM
Host Board
DC+5V/+3.3V
DC+5V/+3.3V
PECL
PECL
DC+5V/+3.3V
DC+5V/+3.3V
3X4.7K to 10K
4.7K to 10K
DC+5V/+3.3V
2X180
GBIC Module
DC+5V/+3.3V
Note A
4.7K to 10K
4.7K to 10K
TX-DISABLE
TX-FAULT
TX-DATQ
TX-DAT
Z0=75
Z0=75
Z0=75
Z0=75
RX-DAT
RX-DATQ
RX-LOS
MOD-DEF(2)
MOD-DEF(1)
MOD-DEF(0)
serDat IN+
serDat IN-
SerDat OUT+
SerDat OUT-
GNDR
Figure 5: Interface Circuit
5of7