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VSC7938

Vitesse Semiconductor
Part Number VSC7938
Manufacturer Vitesse Semiconductor
Description Laser Diode Driver
Published Oct 10, 2007
Detailed Description www.DataSheet4U.com VITESSE SEMICONDUCTOR CORPORATION Preliminary Data Sheet VSC7938 Features SONET/SDH 3.125Gb/s La...
Datasheet PDF File VSC7938 PDF File

VSC7938
VSC7938

Overview
www.
DataSheet4U.
com VITESSE SEMICONDUCTOR CORPORATION Preliminary Data Sheet VSC7938 Features SONET/SDH 3.
125Gb/s Laser Diode Driver with Automatic Power Control Applications • SDH/SONET at 622Mb/s, 1.
244Gb/s, 2.
488Gb/s, 3.
125Gb/s • Power Supply: 3.
3V or 5V ±5% • AC-Coupled to Laser Diode • Programmable Modulation Current: 5mA to 60mA • Programmable Bias Current: 1mA to 100mA • Enable/Disable Control • Typical Rise/Fall Times of 60ps • Automatic Optical Average Power Control • Supply Current of 33mA at 3.
3V • Full-Speed Fibre Channel (1.
062Gb/s) General Description The VSC7938 is a single 3.
3V or 5V supply laser diode driver specially designed for SDH/SONET applications up to 3.
125Gb/s.
External resistors set a wide range of bias and modulation currents for driving the laser.
Data and clock inputs accept differential PECL signals.
The automatic power control (APC) loop maintains a constant average optical power over temperature and lifetime.
The dominant pole of the APC loop ca...


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