поискавой системы для электроныых деталей |
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GS4900B датащи(PDF) 4 Page - Semtech Corporation |
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GS4900B датащи(HTML) 4 Page - Semtech Corporation |
4 / 102 page GS4901B/GS4900B SD Clock and Timing Generator with GENLOCK Data Sheet 37703 - 4 December 2009 4 of 102 Contents Key Features........................................................................................................................................................1 Applications.........................................................................................................................................................1 Description...........................................................................................................................................................1 1. Pin Out...............................................................................................................................................................7 1.1 GS4901B Pin Assignment ...............................................................................................................7 1.2 GS4900B Pin Assignment ...............................................................................................................8 1.3 Pin Descriptions ................................................................................................................................9 1.4 Pre-Programmed Recognized Video Standards .................................................................. 19 1.5 Output Timing Signals ................................................................................................................. 23 2. Electrical Characteristics ......................................................................................................................... 27 2.1 Absolute Maximum Ratings ....................................................................................................... 27 2.2 DC Electrical Characteristics ..................................................................................................... 27 2.3 AC Electrical Characteristics ..................................................................................................... 31 2.4 Solder Reflow Profiles .................................................................................................................. 34 3. Detailed Description.................................................................................................................................. 35 3.1 Functional Overview .................................................................................................................... 35 3.2 Modes of Operation ...................................................................................................................... 35 3.2.1 Genlock Mode..................................................................................................................... 35 3.2.2 Free Run Mode ................................................................................................................... 39 3.3 Output Timing Format Selection .............................................................................................. 40 3.4 Input Reference Signals ............................................................................................................... 41 3.4.1 HSYNC, VSYNC, and FSYNC.......................................................................................... 41 3.4.2 10FID ..................................................................................................................................... 42 3.4.3 Automatic Polarity Recognition ................................................................................... 42 3.5 Reference Format Detector ........................................................................................................ 43 3.5.1 Horizontal and Vertical Timing Characteristic Measurements ......................... 43 3.5.2 Input Reference Validity................................................................................................. 44 3.5.3 Behaviour on Loss and Re-acquisition of the Reference Signal......................... 45 3.5.4 Allowable Frequency Drift on the Reference .......................................................... 47 3.6 Genlock ............................................................................................................................................. 47 3.6.1 Adjustable Locking Time................................................................................................. 49 3.6.2 Adjustable Loop Bandwidth .......................................................................................... 49 3.6.3 Locking to Digital Timing from a Deserializer ......................................................... 52 3.7 Clock Synthesis .............................................................................................................................. 52 3.7.1 Video Clock Synthesis...................................................................................................... 52 3.7.2 Audio Clock Synthesis (GS4901B only)...................................................................... 54 3.8 Video Timing Generator .............................................................................................................. 58 3.8.1 10 Field ID Pulse................................................................................................................. 58 3.8.2 Audio Frame Synchronizing Pulse (GS4901B only)............................................... 59 3.8.3 USER_1~4............................................................................................................................. 60 3.8.4 TIMING_OUT Pins ............................................................................................................. 62 3.9 Extended Audio Mode for HD Demux using the Gennum Audio Core ...................... 63 |
Аналогичный номер детали - GS4900B |
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Аналогичное описание - GS4900B |
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