Adaptive Cable Equalizer

Overview:

The GS2974B is a high-speed BiCMOS integrated circuit designed to equalize and restore signals received over 75Ω co-axial cable.

The GS2974B is designed to support SMPTE 424M, SMPTE 292M and SMPTE 259M, and is optimized for performance at 1.485Gb/s and 2.97Gb/s.

The GS2974B features DC restoration to compensate for the DC content of SMPTE pathological test patterns.

A voltage programmable mute threshold (MCLADJ), applicable for SD mode (refer to Section 4.3), is included to allow muting of the GS2974B output when an approximate selected cable length is reached for SMPTE 259M signals.

This feature allows the GS2974B to distinguish between low amplitude SD-SDI signals and noise at the input of the device. The serial digital outputs of the GS2974B may be forced to a mute state by applying a voltage to the MUTE pin.

Power consumption is typically 215mW using a 3.3V power supply. The GS2974B is lead-free, and the encapsulation compound does not contain halogenated flame retardant.

This component and all homogeneous subcomponents are RoHS compliant.