GS2978CNE3

GS2978 HD-LINX III Multi-Rate Dual Slew-Rate Cable Driver GS2978 Data Sheet Features Description SMPTE 424M, SMPTE 292M, SMPTE 344M and The GS2978 is a high-speed BiCMOS integrated circuit SMPTE 259M compliant designed to drive one or two 75 co-axial cables. Dual coaxial cable driving outputs with selectable The GS2978 may drive data rates up to 2.97Gb/s and slew rate provides two selectable slew rates in order to achieve 50 differential PECL input compliance to SMPTE 424M, SMPTE 259M, SMPTE 344M and SMPTE 292M. Pb-free and RoHS compliant Seamless interface to other HD-LINX III family The GS2978 accepts a LVPECL level differential input products that may be AC coupled. External biasing resistors at the inputs are not required. Single 3.3V power supply operation Operating temperature range: 0C to 70C Power consumption is typically 168mW using a 3.3V power supply. The GS2978 is Pb-free, and the Applications encapsulation compound does not contain halogenated SMPTE 424M, SMPTE 292M, SMPTE 344M and flame retardant. SMPTE 259M Coaxial Cable Serial Digital This component and all homogeneous subcomponents Interfaces. are RoHS compliant. BANDGAP REFERENCE AND BIASING CIRCUIT R SET DDI SDO INPUT OUTPUT STAGE & DIFFERENTIAL CONTROL PAIR DDI SDO SD/HD DISABLE Functional Block Diagram 37186 - 5 October 2007 1 of 14 www.gennum.comGS2978 Data Sheet Contents Features ........................................................................................................................1 Applications...................................................................................................................1 Description ....................................................................................................................1 1. Pin Out ......................................................................................................................3 1.1 Pin Assignment ...............................................................................................3 1.2 Pin Descriptions ..............................................................................................3 2. Electrical Characteristics...........................................................................................4 2.1 Absolute Maximum Ratings ............................................................................4 2.2 DC Electrical Characteristics ..........................................................................4 2.3 AC Electrical Characteristics ...........................................................................5 2.4 Solder Reflow Profiles .....................................................................................6 3. Input / Output Circuits ...............................................................................................7 4. Detailed Description ..................................................................................................8 4.1 Input Interfacing ..............................................................................................8 4.2 Output Interfacing ...........................................................................................8 4.2.1 Output Amplitude (RSET) ......................................................................9 4.2.2 Output Disable .......................................................................................9 4.3 Output Return Loss Measurement ..................................................................9 5. Application Information............................................................................................10 5.1 PCB Layout ...................................................................................................10 5.2 Typical Application Circuit .............................................................................10 6. Package & Ordering Information.............................................................................11 6.1 Package Dimensions ....................................................................................11 6.2 Recommended PCB Footprint ......................................................................12 6.3 Packaging Data .............................................................................................12 6.4 Marking Diagram ...........................................................................................13 6.5 Ordering Information .....................................................................................13 7. Revision History ......................................................................................................14 37186 - 5 October 2007 2 of 14