STV0042 STMICROELECTRONICS [STMicroelectronics], STV0042 Datasheet
STV0042
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STV0042 Summary of contents
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... DESCRIPTION The STV0042A BICMOS integrated circuit realizes all the necessary signal processing from the tuner to the Audio/Video input and output connectors regardless the satellite system. The STV0042 is intended for low cost satellite receiver application. March 1997 5-10MHz (Plastic Package) ORDER CODE : STV0042A ...
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... STV0042A PIN ASSIGNMENT Pin Number Name SUM OUT VOL VID OUT 6 S2 VID OUT 7 VOL VID RTN 9 S2 OUT L 10 CLAMP OUT R 12 UNCL DEEM 13 VIDEEM2/22kHz 14 V 12V 15 VIDEEM1 16 V GND 17 B-BAND RTN L ...
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... The output current is then dumped into an off-chip capacitor which together with the accurate current reference define the min/max rolloff frequencies.A resistor in series with a capacitor is connected to ground from these two pins. STV0042A 25 % resistor 3/24 ...
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... STV0042A PIN DESCRIPTION (continued) U75 L, U75 R External deemphasis networks for channels left and right. For each channel a capacitor and resistor in parallel time constant are connectedbetween hereandV to provide 75 s de-emphasis.Internally REF selectable is an internal resistor that can be pro- grammedtobeaddedin paralleltherebyconvertingthe networktoapprox50 s de-emphasis(see controlblock map).The value of theinternalresistors is30k Theamplifierforthisfilterisvoltageinput,currentoutput ...
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... Video Matrix Audio 2 Matrix + Volume Bus Interface LPF NTSC PAL VIDEEM2/22kHz VIDEEM1 13 15 22kHz TONE 1 G Baseband Normal VCR / Decoder Return S2 VID OUT To Decoder or VCR STV0042A To TV, VCR/Decoder Active in Stand-by UNCL DEEM 12 Deemphasized VID OUT To TV 5/24 ...
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... AUDIO PROCESSING BLOCK DIAGRAM (CHANNEL LEFT) ANRS AUDIO L 5 -6dB PLL FILTER DECODER OR VCR 6/ AUDIO DEEMPHASIS 6dB AUDIO DEEMPHASIS 6dB STV0042A MONO STEREO STV0042A MONO STEREO ...
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... ANRS OFF ANRS AUX OUT Phase SW1 Detect FM dev. Select. Bias V REF Amp. Detect 90 VCO 0 WATCHDOG SYNTHESIZER AUDIO L Phase SW3 Detect FM dev. Select. Bias V REF Amp. Detect 90 VCO 0 WATCHDOG STV0042A DET R AUDIO R CPUMP R SW2 SW4 DET L CPUMP L STV0042A 7/24 ...
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... J17 de-emphasis can be implemented by using specific applicationdiagram (see Application Note : AN838, Chapter 4.2). A dynamic noise reduction system (ANRS) is inte- grated into the STV0042A using a lowpass filter, the cut-off frequency of which is controlled by the amplitude of the audio after insertion of a band- pass filter. Two types of audio outputs are provided : one is a ...
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... Average sink and source current to external capacitor 1V on left and right channel PP External 22nF to GND and 1. REF No audio in 100mV on DET Pins, External PP capacitor 330pF (FC Pins DET Pins, External PP capacitor 330pF (FC Pins) STV0042A Value Unit 15 V 7.0 V 900 -55, + 150 C Value Unit ...
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... STV0042A DC AND AC ELECTRICAL CHARACTERISTICS (continued 12V 5V unless otherwise specified amb Symbol Parameter AUDIO OUTPUT (Pins VOL OUT R, VOL OUT L) DCOL DC Output Level AOLN Audio Output Level with Reg AOL50 Audio Output Level with Reg AOL75 ...
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... GV = 0dB, Reg 0dB, 1V CVBS + 0. 25Hz sawtooth (input : VID IN) 7.02 and 7.2MHz sub-carriers, 12.2dB lower than chroma 5MHz @ 100kHz High impedance mode High impedance mode 1V CVBS through 10nF on input PP STV0042A Min. Typ. Max. Unit 8.7 V 7.9 V 3.8 V 3.5 V 2.25 2.45 2. 2.25 2.45 2 ...
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... STV0042A PIN INTERNAL CIRCUITRY S2 VID RTN, CLAMP source is active only when VIDIN < 2.7V. Figure 10k S2 VID RTN 1 CLAMP VID OUT, S2 VID OUT Same as above but with no black level adjustment. Figure 12V CC 4 2.3mA VID MUX 10k ...
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... Figure 16 U75 L, U75 audio / 18k . eg 1V The are internal switches to match the audio level of the different standards. Figure 17 1 U75 L U75 STV0042A . REF 10k Left Channel 10k REF 1% is required ...
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... STV0042A PIN INTERNAL CIRCUITRY (continued) XTL Figure 18 3 460 460 2 2 XTL 5pF GND 0V 750 A 500 A CPUMP L, CPUMP R An offset on the PLL loop filter will cause an offset in the two 1 A currents that will prevent the PLL from drifting-off frequency. Figure 19 100 A ...
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... ESD. A third bond wire on this pin is connected directly to the die pad (substrate). Figure 25 V 12V Video Pads V GND Vpp 205 BIP 10vpl Digital Pads Vmm GND 5V A GND L A 12V + BIP Audio Pads 12V Substrate - A GND R STV0042A DZPN1 DZPN1 DZPN1 15/24 ...
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... STV0042A PROTOCOL 1) WRITING to the chip S-Start Condition P-Stop Condition CHIP ADDR - 7 bits. 06H W-Write/Read bit is the 8th bit of the chip address. A-ACKNOWLEDGE after receiving 8 bits of data/adress. REG ADDR Address of register to be written to, 8 bits of which bits & 7 are ’X’ or don’ ...
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... H Select frequency synthesizer 1 OFF/ OFF Select frequency synthesizer 2 OFF/ OFF Select RF source (L = OFF det Select RF source (L = OFF det Select frequency for PLL synthesizer - LSB (bit 0) of 10-bit value 7 H Select frequency for PLL synthesizer - bit 1 of 10-bit value STV0042A 17/24 ...
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... STV0042A CONTROL REGISTERS (continued) Reg 7 write/read Bit (default AF ) HEX 0 H Select frequency for PLL synthesizer - bit 2 of 10-bit value 1 H Select frequency for PLL synthesizer 2 H Select frequency for PLL synthesizer 3 H Select frequency for PLL synthesizer 4 L Select frequency for PLL synthesizer ...
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... Noise reduction OFF Noise reduction ON (default) Not to be used Not to be used Switch K5/Audio Source Selection for Scart 2 Aux Audio Output PLL output Not to be used Audio deemphasis (K2 switch O/P) High Z or low power state (default) Left / Right / Stereo on Volume Output STV0042A 19/24 ...
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... Deemphasis 1 + 22kHz (Pin 13 Deemphasis Deemphasis 2 FM DEMODULATION SOFTWARE ROUTINE With the STV0042A circuit, for each channel, three steps are required to acheive a FM demodulation : step :To set the demodulation parameters : FM deviation selection, Subcarrier frequency selection step : To implement a waiting loop to check the actual VCO frequency ...
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... This second option gives sound a few hundredsof ms before the first one. Table 1 : Frequency Synthesis Register Setting for the Most Common Subcarrier Frequencies Subcarrier Freq. (MHz) 5.58 5.76 5.8 5.94 6.2 6.3 6.4 6.48 6.5 6.6 Sub- 6.65 6.8 6.85 7.02 7.20 7.25 7.38 7.56 7.74 7.85 7.92 8.2 8.65 STV0042A Register 6 Register 7 (Hex) Bit 7 Bit ...
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... STV0042A TYPICAL APPLICATION (with 2 video deemphasis network) 22/24 ...
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... TYPICAL APPLICATION (with 22kHz tone and three audio de-emphasis J17) STV0042A 1% - 47.5k R50 4.7k 36k 4.7k 560k R37 2.7nF 27k 4.7k 4.7k 36k 2.7nF 560k R36 4.7k 27k 23/24 ...
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... STV0042A PACKAGE MECHANICAL DATA 42 PINS - PLASTIC SHRINK DIP Millimeters Dimensions Min. Typ 0.51 A2 3.05 3.81 B 0.38 0.46 B1 0.89 1.02 c 0.23 0.25 D 36.58 36.83 E 15.24 E1 12.70 13.72 e 1.778 e1 15. 2.54 3.30 Information furni shed is believed to be accurate and reliable. However, SGS-THOMSON Micr oelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use ...