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Secam Decoder

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Secam Decoder MITSUBISHI LINEAR INTEGRATED CIRCUIT M52325AP SECAM DECODER [GENERAL DESCRIPTION] pin configuration The M52325AP is designed for SECAM chrominance decoding.The IC should preferably be used in conjunction with PAL / NTSC signal processor M52340SP and the fref / IDENT 1 16 CVBS IN switched capacitor baseband delay line. It consists of a bell filter,a demodulator and an identification BELL OUT 2 15 SAND IN circuit. The IC needs no adjustment and few external Vcc 3 M52325AP 14 BLACK ADJ. R components are required. A signal with highly stable BAND GAP 4 13 PLL auto 1 reference frequency is required for the calibration, and a three - level sandcastle pulse for blanking and burst gating. SACAM KILLER OUT 5 12 PLL auto2 GND 6 11 BLACK ADJ. B BELL ref. 7 10 - (B - Y ) OUT [FEATURES] PLL ref. 8 9 - (R - Y ) OUT • Fully integrated filters 16 PIN DIL PLASTIC PACKAGE • No adjustment • Few external compornents • Used with a switched capacitor baseband delay line [STRUCRURE] [APPLICATION] Bipolar Silicon Monolithic IC SECAM Color Television 16 PIN DIL PLASTIC PACKAGE [QUICK REFERENCE DATA] SYMBOL PARAMETER MIN. TYP. MAX. UNIT positive power supply Vcc pin3 7.5 8.0 8.5 V Icc supply current pin3 18 24 30 mA input dynamic range VDR - 1.0 1.4 Vp-p pin16 -(R-Y) output voltage amplitude VR-Y 0.85 1.00 1.15 Vp-p (peak to peak value) ;pin9 -(B-Y) output voltage amplitude VB-Y (peak to peak value) ;pin10 1.10 1.24 1.43 Vp-p MITSUBISHI 1 - 13 MITSUBISHI LINEAR INTEGRATED CIRCUIT M52325AP SECAM DECODER Vcc=8.0V 0.1µ F + BELL PLL PLL OUT 22µF auto2 auto1 0.1µF 2 12 13 3 BAND GAP BANDGAP 4 CVBS IN BELL ACC AMP PLL 16 FILTER B-Y 10 -(B-Y) BELL OUTPUT OUT ref. SECAM BELL DE- 7 EMPHASIS TUNING IDENT SW. R-Y -(R-Y) OUTPUT 9 OUT 0.47µ F INTERFACE PLL PULSE 11 TUNING GEN. BLACK ADJ. B 1 5 8 15 6 14 fref / PLL KILLER SAND GND BLACK IDENT ref. OUT IN ADJ. R 0.47µ F fig.1 M52325AP block diagram 3.85V SAND IN detection level 2.0V 1.25V pin 15 BGP : 3.85V HBLK : 2.0V SAND IN VBLK : 1.25V pin 1 fref = 4.433619MHz fref / IDENT 0.2~0.5Vp-p 4.0VDC at SECAM pin 9 1.5VDC at no SECAM -(R-Y) OUT pin 10 -(B-Y) OUT fig.2 timing waveforms MITSUBISHI 2 - 13 MITSUBISHI LINEAR INTEGRATED CIRCUIT M52325AP SECAM DECODER [Absolute Maximum Rating] (unless otherwise specified Ta = 25°C,surge capacitor is 200pF) SYMBOL PARAMETER MIN. MAX. UNIT positive Vcc power supply - 11 V total Pd - W power dissipation 1.09 operating ambient Topr temperature range -20 +75 °C storage temperature Tstg -40 +125 °C range Vsurge surge voltage ±200 - V 1500 1000 500 power dissipation Pd [mW] 0 0 25 50 75 100 125 150 Ambient Temperature Ta [°C] fig.3 package thermal derating curve ( maximum rating ) MITSUBISHI 3 - 13 MITSUBISHI LINEAR INTEGRATED CIRCUIT M52325AP SECAM DECODER [Note to Electrical Characteristics Measurement] This IC needs a three - level sandcastle pulse at pin 15. (see fig.4 ,fig5) And the reference signal should be highly stable for frequency and amplitude during the vertical blanking period. pin16 CVBS IN over 4.3V 2.5V pin15 SAND IN 0 2.6 8.7 [µsec] fig.4 sandcastle pulse over 4.5V 2.5V pin15 1.5V SAND IN 1.8[msec] pin1 fref/IDENT fref=4.433619MHz fig.5 sandcastle pulse and fref signal MITSUBISHI 4 - 13 MITSUBISHI LINEAR INTEGRATED CIRCUIT M52325AP SECAM DECODER note a) unless otherwise specified ; Vcc=8.0V Ta = 25°C [Electrical Characteristics] note b) unless otherwise specified ; input fref signal , pin 1 is HIGH(Vext1 = 4.75V), Vext16 = 4V TEST PARAMETER SYMBOL CONDITIONS PIN MIN. TYP. MAX. UNIT positive power supply Vcc 3 7.5 8.0 8.5 V A: SG1 supply current Icc 3 18 24 30 mA DC voltage pin2 V2 2 1.4 1.8 2.2 V DC voltage pin4 V4 4 4.1 4.27 4.5 V DC voltage pin11 V11 11 3.9 4.13 4.35 V DC voltage pin12 V12 12 4.5 4.9 5.5 V DC voltage pin13 V13 13 4.5 4.9 5.5 V DC voltage pin14 V14 14 4.0 4.20 4.4 V CVBS in composite video input V16in 16 - 1.0 1.4 Vp-p voltage (peak to peak value)* chrominance input VCL 16 - 167 300 mVp-p voltage(peak to peak value) * note1 input impedance Zin over f=4MHz 16 - 8 - KW note2 BELL FILTER A: SG0 resonance frequency fBO 2 4.236 4.286 4.336 MHz Vcc = 7.5~9.0 V note3 A: SG0 band width fBW 2 250 320 368 KHz DEMODULATER A: SG1 10 linearity VLIN note4 2.6 2.9 3.2 output voltage amplitude A: SG1 9 Vp-p (peak to peak value): -(R-Y) VR-Y 0.85 1.00 1.15 output voltage amplitude A: SG1 10 (peak to peak value): -(B-Y) VB-Y 1.05 1.24 1.43 Vp-p ratio of - ( B-Y ) / - ( R-Y ) VB-Y/VR-Y calculated - 1.10 1.24 1.36 black level error - ( R-Y ) DVRB A: SG2 9 -15 - +15 mV note5 black level error - ( B-Y ) DVBB A: SG2 10 -50 +20 mV note5 - MITSUBISHI 5 - 13 MITSUBISHI LINEAR INTEGRATED CIRCUIT M52325AP SECAM DECODER TEST PARAMETER SYMBOL CONDITIONS PIN MIN. TYP. MAX. UNIT output DC voltage during blanking Vo 9 10 2.1 2.8 3.5 V A: SG1 signal to noise ratio S/N 10 40 - - * dB output bandwidth BWO 10 - 1.5 - * MHz pole frequency of de-emphasis LPF * fp 72 85 98 KHz ratio of pole and zero fp/fo - 3 - frequency * residual harmonic voltage A: SG2 Vhc 10 - 5.2 15 mV (peak to peak value) * output impedance pin 1 HIGH (Vext1 = 4.75V) Zo1 - 200 600 at SECAM * 9 10 W output impedance Zo2 1 - - MW at no SECAM * PIN1 LOW (Vext1 = 2.25V) 9 10 SANDCASTLE PULSE vertical blanking 15 1.0 1.25 1.4 V detection level VVB horizontal blanking 15 1.75 2.0 2.25 V detection level VHB burst gate detection level VBG 15 3.5 3.85 4.2 V rising edge of internal Tr 4.2 4.5 4.8 µsec burst gate pulse * note 6 falling edge of internal Tf 0 0.2 0.5 µsec burst gate pulse * note 7 REFERENCE / IDENTIFICATION reference frequency fref 1 - 4.4336 - MHz note 8 reference voltage amplitude Vref 1 0.20 - 0.57 Vp-p (peak to peak value) note 8 system switches Vext1 = attenuate DC voltage VTH1 1 2.9 3.3 detection level at SECAM - V system switches detection Vext1 = attenuate DC voltage VTH2 1 1.5 2.0 - V level at no SECAM note 9 Vext5 = 1.5V sink current at SECAM IS 1 125 180 235 µA sw5 : on A: SG1 pin5 voltage at SECAM V5S 5 2.4 3.1 3.6 V pin5 voltage at no A: - V5NS 5 SECAM - - 0.2 V sensitivity of identification A: SG1 attenuate amplitude 5 -46 -38 -32 and killer I / K note10 dB note * : These characteristics are for reference , and not guaranteed the limiting value. MITSUBISHI 6 - 13 MITSUBISHI LINEAR INTEGRATED CIRCUIT M52325AP SECAM DECODER [Input Signals] SG No. signal conditions f = 4.0~5.0MHz SG0 sweep signal amplitude : 20 mVp-p B-Y burst signal fOB SG1 100/75 color bar amplitude : 167 mVp-p = 0dB B-Y burst signal fOB SG2 black/white signal amplitude : 167 mVp-p = 0dB three - level sandcastle SCP pulse see fig4 , fig5 f = 4.433619MHz see fig4 , fig5 fref during vertical amplitude : 300mVp-p blanking MITSUBISHI 7 - 13 MITSUBISHI LINEAR INTEGRATED CIRCUIT M52325AP SECAM DECODER [Note to the characteristics] 1. If measured in the burst period of a blue line. a b 2. Pin 16 is AC - coupled. Defined the impedance over f = 4MHz. 3. Measure except during the vertical blanking and burst gate pulse. fig.6 An use of an active probe is advised for low capacitive loading. C 4. Defined as VLIN = b / a ; see fig.6 V2 V1 5. Measure the difference voltage between the blanking(V1) and the black(V2) level . Defined as DVRB(DVBB) = V2-V1 ; see fig.7 fig.7 6. Defined as the time from rising edge detection of PAL burst gate pulse at pin15.(internal) 7. Defined as the time from falling edge detection of PAL burst gate pulse at pin15.(internal) 8. The reference signal should be stable during the vertical blanking. 9. The external supply voltage at pin1 should be exceed 0.5V. 10. Defined as the ratio between VK (i.e. the peak to peak value of the burst period of a blue line) when LOW (0 .2 V) at pin5, and 167 mVp-p the peak to peak value of the burst period of a blue line. I / K = 20 * log10 (Vk / 167 mVp-p) (dB) MITSUBISHI 8 - 13 MITSUBISHI LINEAR INTEGRATED CIRCUIT M52325AP SECAM DECODER 10µF + SCP A 2SC603 W W 5K 2K 0.1µ F Vext16 =4V 16 15 14 13 12 11 10 9 M52325AP 1 2 3 4 5 6 7 8 Vcc + sw5 fref 150pF 22µF 0.1µF Vext5 2SC603 =1.5V 0.47µF 0.47µF W W 5K Vcc=8.0V Vext1 8.2K fig.8 measurement circuit diagram MITSUBISHI 9 - 13 MITSUBISHI LINEAR INTEGRATED CIRCUIT M52325AP SECAM DECODER [Terminal Description] PIN DC VOLTAGE NUMBER SYMBOL DESCRIPTION EQUIVALENT CIRCUIT Vcc for the reference input, 300µA PAL system identification input, and SECAM killer signal output.
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