saa5231 cnv 2, Aplikacje data
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INTEGRATED CIRCUITS DATA SHEET SAA5231 Teletext video processor November 1986 Product specification File under Integrated Circuits, IC02 Philips Semiconductors Product specification Teletext video processor SAA5231 GENERAL DESCRIPTION The SAA5231 is a bipolar integrated circuit intended as a successor to the SAA5030. It extracts Teletext Data from the video signal, regenerates Teletext Clock and synchronizes the text display to the television syncs. The integrated circuit is intended to work in conjunction with CCT (Computer Controlled Teletext), EUROM or other compatible devices. Features · Adaptive data slicer · Data clock regenerator · Adaptive sync separator, horizontal phase detector and 6 MHz VCO forming display phase locked loop (PLL) QUICK REFERENCE DATA Supply voltage (pin 16) V CC typ. 12 V Supply current (pin 16) I CC typ. 70 mA Video input amplitude (pin 27) (peak-to-peak value) pin 2 LOW V 27-13(p-p) typ. 1 V pin 2 HIGH V 27-13(p-p) typ. 2,5 V Storage temperature range T stg -20 to + 125 ° C Operating ambient temperature range T amb 0to + 70 ° C PACKAGE OUTLINE 28-lead dual in-line; plastic (SOT117); SOT117-1; 1996 November 14 November 1986 2 sandcastle input pulse (PL/CBB) video recorder mode input (VCR) video composite sync output (VCS) V CC ( + 12 V) text composite sync input (TCS) or scan composite sync input (SCS) 25 24 23 22 21 19 10 20 18 16 28 HORIZONTAL PHASE DETECTOR VOLTAGE CONTR. OSCILLATOR 6 MHz clock output (F6) 17 PULSE GENERATOR SENSE 'NO INPUT' SAA5231 teletext data output (TTD) ADAPTIVE DATA SLICER 15 LATCHES composite video input DUAL POLARITY BUFFER ADAPTIVE SYNC SEPARATOR 27 CLOCK PHASE DETECTOR teletext clock output (TTC) 14 26 SENSE 'NO LOAD' 12 PHASE SHIFTER SENSE EXTERNAL DATA GAIN SWITCH HF LOSS COMPENSATOR OSCILLATOR ÷ 2 2 3 4 1 5 6 8 7 9 11 13 video input level select sync output external data input MGH184 Fig.1 Block diagram. Philips Semiconductors Product specification Teletext video processor SAA5231 PINNING text composite sync input (TCS) or scan composite sync input (SCS) handbook, full pagewidth sync output 1 28 video input level select 2 27 composite video input HF filter 3 26 black level store HF video composite sync output (VCS) 4 25 store amplitude pulse timing capacitor 5 24 store zero level 6 23 pulse timing resistor external data input 7 22 sandcastle input pulse (PL/CBB) SAA5231 data timing 8 21 filter 1 store phase 9 20 oscillator input VCR 10 19 filter 2 crystal 11 18 oscillator output clock filter 6 MHz output (F6) 12 17 ground supply V CC 13 16 clock output (TTC) 14 15 data output (TTD) MGH185 Fig.2 Pinning diagram. RATINGS Limiting values in accordance with the Absolute Maximum System (IEC 134) Supply voltage (pin 16) V CC max. 13,2 V Storage temperature range T stg - 20 to + 125 ° C Operating ambient temperature T amb 0 to + 70 ° C November 1986 4 Philips Semiconductors Product specification Teletext video processor SAA5231 CHARACTERISTICS V CC = 12 V; T amb =25 ° C with external components as shown in application circuits unless otherwise stated. PARAMETER SYMBOL MIN. TYP. MAX. UNIT Supply (pin 16) Supply voltage V CC 10,8 12,0 13,2 V Supply current I CC 50 70 105 mA Video input and sync separator Video input amplitude (sync to white) (peak-to-peak value) video input select level LOW (pin 2) V 27-13(p-p) 0,7 1 1,4 V video input select level HIGH (pin 2) V 27-13(p-p) 1,75 2,5 3,5 V Source impedance ï Z s ï - - 250 W Sync amplitude (peak-to-peak value) V 27-13(p-p) 0,1 - 1 V Video input level select Input voltage LOW V 2-13 0 - 0,8 V Input voltage HIGH V 2-13 2,0 - 5,5 V Input current LOW I 2 0 - - 150 m A Input current HIGH I 2 0 - 1 A Text composite sync input (TCS) Input voltage LOW V 28-13 0 - 0,8 V Input voltage HIGH V 28-13 2,0 - 7,0 V Scan composite sync input (SCS) Input voltage LOW V 28-13 0 - 1,5 V Input voltage HIGH V 28-13 3,5 - 7,0 V Select video sync from pin 1 Input current (pin 28) at V 28 = 0 to 7 V I 28 - 40 - 70 - 100 m A at V 28 = 10 V to V CC I 28 - 5 - + 5 m A Video composite sync output (VCS) Output voltage LOW V 25-13 0 - 0,4 V Output voltage HIGH V 25-13 2,4 - 5,5 V D.C. output current LOW I 25 0,5 mA - - D.C. output current HIGH I 25 - - - 1,5 mA Sync separator delay time t d 0,25 0,35 0,40 m s November 1986 5 [ Pobierz całość w formacie PDF ] |