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SAA4990H Datasheet Progressive Scan-zoom And Noise Reduction Ic

Manufacturer: Philips Semiconductors (now NXP Semiconductors)

Overview: INTEGRATED CIRCUITS DATA SHEET SAA5191 Teletext video processor Preliminary specification File under Integrated Circuits, IC02 March 1991 Philips Semiconductors Preliminary specification Teletext video processor.

General Description

The SAA5191 is a bipolar integrated circuit that extracts teletext data from the video signal (CVBS), regenerates the teletext clock (TTC) and synchronizes the text display to the television signals (VCS).

This device operates in conjunction with the Digital Video Teletext (back-end) Decoder (DVTB - SAA9042A) or any other compatible device.

QUICK REFERENCE DATA SYMBOL VP IP Vi CVBS supply current CVBS input signal on pin 27 (peak-to-peak value) at pin 2 LOW at pin 2 open-circuit Vo VF13 VSYNC VCS outputs signals TTC and TTD (peak-to-peak value, pins 14, 15) 13.5 MHz clock output signal (peak-to-peak value pin 17) SYNC output signal TCS video composite sync level on output pin 25 LOW HIGH Tamb operating ambient temperature − 2.4 0 − − − 0.4 5.5 +70 V V °C − − 2.5 1 1 2.5 3.5 2 − 450 − − 4.5 3 1 650 V V V V V mV PARAMETER supply voltage (pin 16) − − MIN.

Key Features

  • Adaptive data slicer.
  • Crystal-controlled data clock regeneration with a bit rate of 6.9375 MHz.
  • Adaptive sync separator, horizontal phase detector and 13.5 MHz VCO to provide display phase locked loop (PLL).
  • TV synchronization at teletext mode.

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