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Sync separator adapts to standards

Posted: 11 Jul 2005 ?? ?Print Version ?Bookmark and Share

Keywords:intersil? sync separator? isl59885?

Intersil Corp. released a sync separator that extracts sync timing information from both standard and non-standard video inputs.

The ISL59885 provides support for HDTV and standard definition formats. The device provides composite sync, horizontal sync and vertical sync outputs. It requires no external programming or set resistors. This allows maximum system flexibility since it does not require an external microprocessor or manual configuration, said Sameer Vuyyuru, Intersil's director for High Speed Analog. Additionally, high definition video is flagged by the HD pin going low when the input horizontal frequency is greater than 20KHz.

"Existing sync separator architectures require significant involvement of the rest of the system to adjust the timing based on the incoming line rate," Vuyyuru said. "Our new ISL59885 eliminates that requirement by using a revolutionary frequency to current converter that auto calibrates the timing of the device. The device also includes a system power saving feature called HD Detect that allows the system designer to control the scaler parameters."

For the first time, TV and display equipment suppliers have the option to use a single sync processing path that is robust over temperature and tolerant of the variations in broadcast, video and graphics standards worldwide, according to Vuyyuru.

Other features of the ISL59885 include NTSC, PAL, SECAM, HDTV, non-standard video support, a single 3V to 5V supply, and fixed 70mV slicing of video input levels.

The ISL59885 is available in an 8-lead SO Pb-free finish (RoHS compliant). Suggested pricing in 1,000-unit quantities is $1.85.

- Bettyann Liotta


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