GS4882, GS4982 Video Sync Separators with 50% Sync Slicing for superior sync extraction in the presence of noise and Features varying sync pulse amplitudes. The high performance dual precision 50% sync slicing mode input clamp aids in maintaining the accuracy of the internal color burst filter internally derived 50% sync slicing level to within 5% as 5ns temperature stability well in reducing system start-up/recovery time. In superior noise immunity addition, a missing pulse detector enables the devices to quickly respond to impulse noise by temporarily turning on robust signal detection/output muting circuitry a Nosync Recovery Current connected to the dual mode high performance dual mode input clamp input clamp. The input stage will operate with input signal 0.5V to 4.0Vpp input signal with +5V supply amplitudes ranging from +0.5 to +4.0V peak to peak with a composite, vertical, back porch, odd/even outputs +5V supply voltage. horizontal sync output available with GS4982 The GS4882 and GS4982 have robust signal detection and +4.5V to +13.2V supply voltage range output muting circuitry. Should valid video be removed from the device input, the absence of video will be Pb-free and Green automatically detected and all outputs muted to a logic high state after a defined probation period. Upon the return Description of a valid video signal, device outputs are enabled after The GS4882 and GS4982 are precision sync separators for receiving 8 lines of video. An internal frequency to voltage extracting timing information from NTSC, PAL, and SECAM converter also allows the device to differentiate between video signals. The GS4882 generates noise immune and valid and invalid input signals by analyzing the horizontal temperature stable composite sync, vertical sync, back scan rate of the input signal and comparing it against the porch and odd/even field signals. The GS4982 provides a expected input signal scan rate. horizontal sync output for those applications requiring horizontal sync extraction. The GS4882 and GS4982 are available in standard 8-pin PDIP and SOIC packages, operate with a +4.5V to +13.2V The GS4882 and GS4982 feature an internal color burst supply voltage range and typically consume less than 6mA filter for minimization of spurious timing information and of current with a +5V supply voltage. the reduction of external component count. The precision 50% sync slicing feature embodied in the device provides GS4882 GS4982 COMPOSITE V V 8 HORIZONTAL 8 1 1 SYNC OUT cc cc COMPOSITE COMPOSITE 2 7 ODD/EVEN 7 2 ODD/EVEN VIDEO IN VIDEO IN VERTICAL VERTICAL 3 6 6 3 R R SYNC OUT SET SYNC OUT SET GROUND 4 5 GROUND 5 BACK PORCH 4 BACK PORCH Figure A: Pin Connections GS4882, GS4982 Video Sync Separators with 50% Sync 1 of 13 www.gennum.com Slicing Data Sheet Proprietary & Confidential 8505 - 2 November 2009Revision History Version Date Changes and/or Modifications 2 November 2009 Updated to latest Gennum template and changed from document number 52161 to 8505. 1 July 2004 Revisions made. 0 March 1996 New document. Contents Features.................................................................................................................................................................1 Description...........................................................................................................................................................1 Revision History .................................................................................................................................................2 1. Electrical Characteristics ............................................................................................................................3 1.1 Absolute Maximum Ratings ..........................................................................................................3 1.2 Electrical Characteristics ...............................................................................................................3 2. Circuit Description........................................................................................................................................5 2.1 Composite Video Input (Pin 2) .....................................................................................................5 2.2 Composite Sync Output (Pin 1 GS4882) ....................................................................................6 2.3 Back Porch Output (Pin 5) ..............................................................................................................7 2.4 Vertical Sync Output (Pin 3) ..........................................................................................................7 2.5 Odd/Even Output (Pin 7) ................................................................................................................8 2.6 Horizontal Output (Pin 1 on GS4982) .........................................................................................8 2.7 Signal Detect and Output Mute ...................................................................................................9 3. Ordering Information................................................................................................................................ 12 GS4882, GS4982 Video Sync Separators with 50% Sync 2 of 13 Slicing Data Sheet Proprietary & Confidential 8505 - 2 November 2009