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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 te.
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 3.12.
| No. | Partie # | Fabricant | Description | Fiche Technique |
|---|---|---|---|---|
| 1 | VSC7937 |
ETC |
Single Supply 2.5Gb/s Voltage Driver |
|
| 2 | VSC7939 |
Vitesse Semiconductor |
Laser Diode Driver |
|
| 3 | VSC7902 |
Vitesse Semiconductor |
SONET/SDH Transimpedance Amplifier |
|
| 4 | VSC7923 |
Vitesse Semiconductor |
SONET/SDH 2.5Gb/s Laser Diode Driver |
|
| 5 | VSC7924 |
Vitesse Semiconductor |
SONET/SDH 2.5Gb/s Laser Diode Driver |
|
| 6 | VSC7925 |
Vitesse Semiconductor |
SONET/SDH 2.5Gb/s Laser Diode Driver |
|
| 7 | VSC7927 |
ETC |
SONET/SDH 2.5Gb/s Laser Diode Driver |
|
| 8 | VSC7928 |
ETC |
SONET/SDH 3.2Gb/s Laser Diode Driver |
|
| 9 | VSC7940 |
Vitesse Semiconductor |
SONET/SDH 3.125Gb/s Laser Diode Driver |
|
| 10 | VSC7959 |
ETC |
3.125Gb/s CML Limiting Amplifier with LOS Detect |
|
| 11 | VSC7961 |
Vitesse Semiconductor |
3.125Gb/s PECL Limiting Amplifier |
|
| 12 | VSC7969 |
Vitesse Semiconductor |
3.125Gb/s Integrated Transimpedance and Limiting Amplifier |
|