General Description

The VSC7961 is a single-supply limiting amplifier with Loss of Signal (LOS) detect for SONET/SDH and Fibre Channel applications up to 3.125Gb/s. The VSC7961 provides a constant output signal swing for a wide range of input voltages and has Positive Emitter-Coupled Logic (PECL). The VSC7959 provides the same functionality as the VSC7961 with Current-Mode Logic (CML) outputs. Key features of the VSC7961 are its RMS power detectors for programmable LOS detection, optional output squelch, adjustable output levels, excellent jitter performance, and fast edge rates. The VSC7961 is available in die form or in a TSSOP-16 package.

Features

• 3.3V or 5V Power Supply

• Typical Supply Current of 32mA

• Positive Emitter-Coupled Logic (PECL) Outputs

• Optional Output Squelch

• Loss of Signal Detect

• Output Offset Correction

• Rise/Fall Times Faster than 100ps

• Packages: TSSOP-16, Bare Die

Applications

• SONET/SDH at 622Mb/s, 1.244Gb/s, 2.488Gb/s,

and 3.125Gb/s

• Full-Speed Fibre Channel (1.062Gb/s)

• Small Form Factor (SFF) Receivers

• ATM Optical Receivers