V23870-A1131-A100 Datasheet, PDF (5/15 Pages) Infineon Technologies AG – Bi-Directional Pigtail SFF Transceiver 155 Mbit/s, 1310 nm Tx / 1550 nm Rx

V23870-Ax131-xx00
V23870-Ax132-xx00
Description
The receiver component converts the optical serial data into PECL compatible electrical
data (RD+ and RD-). The Signal Detect (SD, active high) shows whether an optical
signal is present.
The transmitter converts PECL compatible electrical serial data (TD+ and TD-) into
optical serial data. Data lines are differentially 100 Ohm 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.
The laser can be disabled by the TxDis input.
Data Sheet
5
2003-06-13