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VSC7938 - Laser Diode Driver

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.

Key Features

  • SONET/SDH 3.125Gb/s Laser Diode Driver with Automatic Power Control.

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Datasheet Details

Part number VSC7938
Manufacturer Vitesse Semiconductor
File Size 257.83 KB
Description Laser Diode Driver
Datasheet download datasheet VSC7938 Datasheet

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VSC7939 Laser Diode Driver
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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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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.