UPC1876GT NEC, UPC1876GT Datasheet
UPC1876GT
Related parts for UPC1876GT
UPC1876GT Summary of contents
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DESCRIPTION The PC1876 is an integrated circuit for US MTS (Multi Channel Television Sound) system. All functions for US MTS system are provided on one chip. The PC1876 has built-in SAP (Sub Audio Program) discrimination error protection circuit. FEATURES ...
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SYSTEM BLOCK DIAGRAM (TV) Tuner DTS interface Degital tuning controller Remote control reception amplifier PIN photo-diode 2 PIF Color, intensity and Color & deflecting signal output SIF processor Vertical output Dual attenuator/ Sound PC1876 Matrix surround output processor Data Sheet ...
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... F D2 Comparator 42 Notes 1. Do not leave the Internally Connected (IC) pin open because base-open pin. Connect this pin GND. 2. Am: Amplitude modulation (Carrier frequency is 31.5 kHz (2fH)) Remark Use the following for external parts. Resistor ( ) : Metal film resistor ( 1%). Unless otherwise specified; 5% Capacitors ( ) : Tantalum capacitor ( 10%). Unless otherwise specified ...
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... SAP VCO SETTING 35 BIAS (1.5 V) 1/2 V FILTER 34 CC MONAURAL OFFSET ABSORPTION MONAURAL OFFSET ABSORPTION 1 31 SIGNAL GND 30 VCA OFFSET ABSORPTION 29 L CHANNEL OUTPUT 28 R CHANNEL OUTPUT 27 INTERNAL CONNECTION 26 F-MONAURAL SELECTION 25 MATRIX MUTE 24 STEREO/SAP SWITCH 23 SAP 1/2 SWITCH STEREO LED DRIVER/ 22 STEREO VCO FREE-RUN MONITOR ...
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INTERNAL EQUIVALENT CIRCUITS ............................................................................................ 2. FUNCTION OF EACH BLOCK ..................................................................................................... 13 2.1 Stereo Demodulation Block ................................................................................................... 14 2.2 SAP Demodulation Block ....................................................................................................... 15 2.3 dbx Noise Reduction Block ................................................................................................... 15 2.4 Matrix Block ............................................................................................................................ 17 3. EXPLANATION OF EACH ...
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INTERNAL EQUIVALENT CIRCUITS Pin Number Pin Name 1 COMPOSITE SIGNAL INPUT 2 SAP BPF OUTPUT 3 SAP DISCRIMINATION FILTER INPUT 6 Symbol Internal Equivalent Circuit COM SBO ...
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Pin Number Pin Name 4 SAP DISCRIMINATION FILTER 5 NOISE DETECTION FILTER 6 SAP SINGLE OUTPUT 7 SAP SINGLE INPUT 8 STEREO VCO FREE-RUN MONITOR SWITCH 9 VARIABLE EMPHASIS OUTPUT 10 WIDE-BAND VCA INPUT 11 POWER SUPPLY (9 V) Symbol ...
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Pin Number Pin Name 12 SPECTRAL RMS OFFSET ABSORPTION 13 WIDE-BAND RMS OFFSET ABSORPTION 14 TIMING CURRENT SETTING 15 WIDE-BAND RMS SETTING 16 SPECTRAL RMS SETTING 17 SPECTRAL RMS TIMING 18 WIDE-BAND RMS TIMING 8 Symbol Internal Equivalent Circuit SRB ...
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... STEREO VCO FREE-RUN MONITOR 23 SAP1/2 SWITCH 24 STEREO/SAP SWITCH 25 MATRIX MUTE 26 F-MONAURAL SELECTION 27 INTERNAL CONNECTION Note Do not leave the Internally Connected (IC) pin open because base-open pin. Connect this pin to V GND. Symbol Internal Equivalent Circuit LGND DCO SAPL STL ...
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Pin Number Pin Name 28 R CHANNEL OUTPUT 29 L CHANNEL OUTPUT 30 VCA OFFSET ABSORPTION 31 SIGNAL GND 32 MONAURAL OFFSET ABSORPTION 1 33 MONAURAL OFFSET ABSORPTION 2 34 1/2 V FILTER CC 10 Symbol Internal Equivalent Circuit ROT ...
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Pin Number Pin Name 35 BIAS (1 SAP VCO SETTING 37 FILTER ADJUSTMENT 38 STEREO VCO SETTING Symbol Internal Equivalent Circuit SAPVA ...
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Pin Number Pin Name 39 PILOT DISCRIMINATION FILTER 1 PD1 40 PILOT DISCRIMINATION FILTER 2 PD2 41 PHASE COMPARATOR FILTER 1 42 PHASE COMPARATOR FILTER 2 12 Symbol Internal Equivalent Circuit ...
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FUNCTION OF EACH BLOCK In the US, TV audio signals are broadcast in FM modulation. The stereo (L–R), Sub Audio Program (SAP) and telemetry signals are multiplexed in a higher frequency band than the monaural (L+R) signal (50 Hz ...
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... LPF. The two signals differ from each other by 90 degrees in terms of phase. The resistor and capacitor connected to the D1 and D2 pins form a filter which smoothes the phase error signal output from the phase comparator, converting the error signal to the DC voltage. When the voltage difference ...
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... When the noise level exceeds the reference level, the stereo LED and SAP LED are turned off, and the stereo and SAP demodulation are stopped. Adjust the value of the resistor and capacitor connected to the NDT pin for the sensitivity and time constant of the noise detection circuit. ...
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Hz LPF A de-emphasis filter. The transfer function is as follows 408 (3) Variable emphasis Also called spectral VCA and controlled by the spectral ...
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... Detects the RMS value of the signal which has passed through the wide band RMS filter and converts the signal to the DC voltage. The timing (release time) is determined by the current inside the PC1876 (I capacitance of the external capacitor connected to the WTI pin. Set I for the setting of I ...
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... EXPLANATION OF EACH FUNCTION Caution Apply bias voltage to the F-MONAURAL SELECTION pin, the MATRIX MUTE pin, the SAP 1/2 pin and the STEREO/SAP SWITCH pin. Don’t leave those pins unconnected because those pins are base open. Loss current is 0 less. Mode matrix table is shown in 3.1, and functions of mode switch pins are explained in 3.2 to 3.5. ...
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F-MONAURAL SELECTION Pin When the F-MONAURAL SELECTION is ON, the R CHANNEL OUTPUT and L CHANNEL OUTPUT output monaural (L+R) signal regardless of broadcasting mode. The PC1876 varies in pin function of the F-MONAURAL SELECTION. Output pin Input signal ...
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... L CHANNEL OUTPUT Scattering rate of impedance is about 30%. 4.2 Output Load Impedance If the L CHANNEL OUTPUT pin and the R CHANNEL OUTPUT pin are connected to GND through 10 k resistor, they can drive 700 load impedance. And, when connecting a load capacitance over 100 pF to the L/R CHANNEL OUTPUT pins, parasitic oscillation can cause ...
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... Please be careful because stereo distortion rate become worse if capacitor is too small. • In case noise detection circuit doesn’t operate with stereo necessary that capacitor between the PILOT DISCRIMINATION FILTER pins is about 2.2 F (Protection for miss operation in the weak electric field). The time for changing to stereo, become longer if capacitor is too large ...
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... Apply a composite signal (30% modulation, 300 Hz, L-only, with noise reduction) to the COMPOSITE SIGNAL INPUT pin. (2) Adjust the variable resistor connected to the WIDE-BAND RMS SETTING pin so that the output at the R CHANNEL OUTPUT pin is minimized. (3) Apply a composite signal (30% modulation, 3 kHz, L-only, with noise reduction) to the COMPOSITE SIGNAL INPUT pin ...
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... Input SAP signal ( modulation) to the COMPOSITE SIGNAL INPUT pin. Adjust the variable resistor H connected to the SAP VCO SETTING pin so that the DC voltage of the SAP SINGLE OUTPUT pin may match with the DC voltage measured in step (1). 5.5 List of Pin Settings in Adjustment Pin Name ...
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ELECTRICAL SPECIFICATIONS Absolute Maximum Ratings (T = +25˚C) A Parameter Symbol Supply voltage V CC LED driver current I D Control pin voltage V cont Input signal voltage V in Power dissipation P D Operating ambient temperature T A ...
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Electrical Characteristics (T = +25˚ Parameter Symbol Supply current I CC Stereo detection input sensitivity ST SENSE Stereo detection hysteresis ST HY Stereo detection capture range SAP detection input sensitivity SAP SENSE SAP detection ...
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Parameter Symbol SAP single frequency V OSAP21 characteristics 1 SAP single frequency V OSAP22 characteristics 2 SAP single frequency V OSAP23 characteristics 3 Stereo channel separation 1 Sep 1 Stereo channel separation 2 Sep 2 Stereo channel separation 3 Sep ...
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Electrical Characteristics Measurement List (T Parameter Symbol Supply current I Current flowing Stereo detection ST Input signal (f = 15.734 kHz) to COM pin. Raise input voltage gradually until stereo LED SENSE input sensitivity turns ON. Then ...
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Parameter Symbol Difference V Set MUTE and FMONO pin to “L”. OLR between monaural Input monaural signal (100% modulation 300 Hz) to COM pin. Measure output L and R output voltage of ROT and LOT pin. Assume the ...
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Parameter Symbol Stereo total V Set ST/SAP, FMONO pins to “H” and MUTE pin to “L”. OST3 frequency Input L-only signal (30% modulation 300 Hz) to COM pin. Assume output voltage of characteristics 3 LOT pin “V Input ...
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Parameter Symbol SAP single V Input SAP signal (30% modulation 300 Hz) to COM pin. Assume output voltage of OSAP22 frequency SOT pin “V characteristics 2 Input SAP signal (30% modulation kHz) to COM pin. ...
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... Input L-only signal ( kHz, 30% modulation) and SAP signal (f = 800 Hz, 30% modulation) to COM pin. Assume output voltage of the LOT pin “V Connect LOT pin to 3 kHz BPF (gain = kHz, – more 800 Hz) to LOT pin. Assume output voltage of BPF “V ...
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Parameter Symbol Monaural total S/N Set MUTE and FMONO pins to “L”. MO S/N Input no signal to COM pin, and assume output voltage of ROT pin “V Input monaural signal (100% modulation 300 Hz) to COM pin, ...
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Measuring Circuit Mode Table Item Supply current Stereo detection input sensitivity Stereo detection hysteresis Stereo detection capture range SAP detection input sensitivity SAP detection hysteresis Noise detection input sensitivity Noise detection hysteresis Monaural total output voltage Stereo total output voltage ...
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Item Cross talk 1 SAP Stereo Cross talk 2 Stereo SAP Total muting level LED driver saturation voltage dbx timing current Inter-mode DC offset 1 Mute monaural Inter-mode DC offset 2 Mute stereo Inter-mode DC offset 3 Mute SAP Monaural ...
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... F 4.7 F Notes 1. Filter: 126XGS-7990Z, manufactured by Toko Co. Ltd not leave the Internally Connected (IC) pin open because base-open pin. Connect this pin GND. Remark Use the following for external parts. Resistor ( ) : Metal film resistor ( 1%). Unless otherwise specified; 5% Capacitors ( ) : Tantalum capacitor ( 10%). Unless otherwise specified; 20% ...
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DIFFERENCES BETWEEN THE Stereo VCO adjustment external resistor 20 k Filter adjustment input frequency Filter adjustment external resistor Stereo total frequency chatacteristics kHz Stereo total frequency chatacteristics kHz SAP ...
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PACKAGE DRAWING 42-PIN PLASTIC SSOP (9.53 mm (375 NOTE Each lead centerline is located within 0. its true position (T.P.) at maximum material condition ...
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... This product should be soldered and mounted under the conditions recommended in the table below. For details of recommended soldering conditions, refer to the information document Semiconductor Device Mounting Technology Manual (C10535E). For soldering methods and conditions other than those recommended below, contact an NEC sales representative. Table 10-1. Surface Mounting Type Soldering Conditions PC1876GT: 42-pin plastic SSOP (9.53 mm (375)) ...
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Data Sheet S11666EJ4V0DS00 PC1876 39 ...
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... NEC does not assume any liability for infringement of patents, copyrights or other intellectual property rights of third parties by or arising from the use of NEC semiconductor products listed in this document or any other liability arising from the use of such products. No license, express, implied or otherwise, is granted under any patents, copyrights or other intellectual property rights of NEC or others ...