V23848-N15-C656 Datasheet, PDF (5/27 Pages) Infineon Technologies AG – iSFP™ - Intelligent Small Form-factor Pluggable SONET OC-48 IR-1 / SDH STM S-16.1 Multirate Applications up to 2.67 Gbit/s

V23848-N15-C656
Description
Functional Description of iSFP™ Transceiver
This transceiver is designed to transmit serial data via single mode cable.
Tx Fault
Tx Disable
TD+
TD−
RD+
RD−
LOS
MOD-DEF(2)
MOD-DEF(1)
Automatic
Shut-Down
Laser
Driver
Tx Coupling Unit
e/o
Laser
Power
Control
Monitor
Limiting
Amp
o/e
Rx Coupling Unit
TIA
o/e
Single Mode Fiber
Digital Diagnostic
Monitoring Interface
EEPROM
Alarm and
Warning Flags
File: 1354
Figure 2 Functional Diagram
The receiver component converts the optical serial data into CML compatible electrical
data (RD+ and RD–). The Loss Of Signal (LOS) shows whether an optical signal is
present.
The transmitter converts CML compatible electrical serial data (TD+ and TD–) into
optical serial data. Data lines are differentially 100 Ω 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.
Preliminary Product Information
5
2004-06-22