Datenblatt-Suchmaschine für elektronische Bauteile |
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GS2978-CNE3 Datenblatt(PDF) 10 Page - Gennum Corporation |
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GS2978-CNE3 Datenblatt(HTML) 10 Page - Gennum Corporation |
10 / 15 page GS2978 HD-LINX® III Multi-Rate Dual Slew-Rate Cable Driver Data Sheet 37186 - 7 March 2009 10 of 15 5. Application Information 5.1 PCB Layout Special attention must be paid to component layout when designing serial digital interfaces for HDTV. An FR-4 dielectric can be used, however, controlled impedance transmission lines are required for PCB traces longer than approximately 1cm. Note the following PCB artwork features used to optimize performance: • The PCB trace width for HD rate signals is closely matched to SMT component width to minimize reflections due to changes in trace impedance. • The PCB ground plane is removed under the GS2978 output components to minimize parasitic capacitance. • The PCB ground plane is removed under the GS2978 RSET pin and resistor to minimize parasitic capacitance. • Input and output BNC connectors are surface mounted in-line to eliminate a transmission line stub caused by a BNC mounting via high speed traces which are curved to minimize impedance variations due to change of PCB trace width. 5.2 Typical Application Circuit Figure 5-1: Typical Application Circuit SD/HD GS2978 1 2 3 4 12 11 10 9 DDI DDI VEE RSET SDO SDO SD/HD VCC 10n 75 5.6n* 4u7 BNC VCC 75 5.6n* 10n 75 4u7 49.9 750 10n 49.9 4u7 75 BNC VCC 4u7 VCC * TYPICAL VALUE: VARIES WITH LAYOUT DIFFERENTIAL DATA INPUT NOTE: All resistors in Ohms, capacitors in Farads, and inductors in Henrys, unless otherwise noted. DISABLE 6 DISABLE |
Ähnliche Teilenummer - GS2978-CNE3 |
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Ähnliche Beschreibung - GS2978-CNE3 |
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