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TDA2579B Datasheet(PDF) 2 Page - NXP Semiconductors |
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TDA2579B Datasheet(HTML) 2 Page - NXP Semiconductors |
2 / 21 page September 1990 2 Philips Semiconductors Preliminary specification Horizontal/vertical synchronization circuit TDA2579B GENERAL DESCRIPTION The TDA2579B generates and synchronizes horizontal and vertical signals. The device has a 3 level sandcastle output; a transmitter identification signal and also 50/60 Hz identification. Features • Horizontal phase detector, (sync to oscillator), sync separator and noise inverter • Triple current source in the phase detector with automatic selection • Second phase detector for storage compensation of the horizontal output • Stabilized direct starting of the horizontal oscillator and output stage from mains supply • Horizontal output pulse with constant duty cycle value of 29 µs • Internal vertical sync separator, and two integration selection times • Divider system with three different reset enable windows • Synchronization is set to 628 divider ratio when no vertical sync pulses and no video transmitter is identified • Vertical comparator with a low DC feedback signal • 50/60 Hz identification output combined with mute function • Automatic amplitude adjustment for 50 and 60 Hz and blanking pulse duration • Automatic adaption of the burst-key pulsewidth PACKAGE OUTLINE 18-lead dual in line; plastic (SOT 102); SOT102-1; 1996 November 19. |
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