V23818-K305-L15 Infineon Technologies, V23818-K305-L15 Datasheet - Page 5

• Manufacturer Part Number: V23818-K305-L15
• Description: Small Form Factor Multimode 850 nm 1.0625 GBd Fibre Channel 1.25 Gigabit Ethernet Transceiver 2x5 Pinning with LC Connector
• Manufacturer: Infineon Technologies

Functional Description of 2x5 Pin Row Transceiver
This transceiver is designed to transmit serial data via multimode cable.
Figure 2
The receiver component converts the optical serial data into LVPECL compatible
electrical data (RD+ and RD–). The Signal Detect (SD) shows whether an optical signal
is present.
The transmitter converts LVPECL compatible electrical serial data (TD+ and TD–) into
optical serial data. Data lines are differentially 100 W terminated.
The transmitter contains a laser driver circuit that drives the modulation and bias current
of the laser diode. The currents are controlled by a power control circuit to guarantee
constant output power of the laser over temperature and aging.
The power control uses the output of the monitor PIN diode (mechanically built into the
laser coupling unit) as a controlling signal, to prevent the laser power from exceeding the
operating limits.
Single fault condition is ensured by means of an integrated automatic shutdown circuit
that disables the laser when it detects laser fault to guarantee the laser Eye Safety.
The transceiver contains a supervisory circuit to control the power supply. This circuit
makes an internal reset signal whenever the supply voltage drops below the reset
threshold. It keeps the reset signal active for at least 140 milliseconds after the voltage
has risen above the reset threshold. During this time the laser is inactive.
A low signal on TxDis enables transmitter. If TxDis is high the transmitter is disabled.
Data Sheet
Functional Diagram
TxDis
RD
RD+
TD+
TD
SD
Monitor
Automatic
Shut-Down
LEN
Receiver
Power
Control
Laser
Driver
5
Tx
Coupling Unit
Rx
Coupling Unit
e/o
Laser
o/e
o/e
Multimode Fiber
V23818-K305-Lxx
File: 1358
Description
2003-01-22