V23836-C18-C63 Datasheet, PDF (4/13 Pages) Infineon Technologies AG – 1x9 Transceiver with Duplex SC Receptacle Single Mode 1300 nm 21 km SONET OC-3 / SDH STM-1

V23836-C18-C63
V23836-C18-C363
Description
Functional Description
This transceiver is designed to transmit serial data via single mode fiber.
TD−
TD+
RD−
RD+
SD
Automatic
Shut-Down
Laser
Driver
Power
Control
Monitor
Receiver
Tx
Coupling Unit
e/o
Laser
o/e
Rx
Coupling Unit
o/e
Single
Mode
Fiber
File: 1365
Figure 2 Functional Diagram
The receiver component converts the optical serial data into PECL compatible electrical
data (RD+ and RD–). The Signal Detect (SD, active high) shows whether optical data is
present .¹⁾
The transmitter converts electrical PECL compatible serial data (TD+ and TD–) into
optical serial data.
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 transmitter failures or when V_CC is too high. A reset
is only possible by turning the power off, and then on again.
1) _{We recommend to switch off the transmitter supply (VCCTx) if no transmitter input data is applied.}
Preliminary Product Information
4
2004-02-13