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PDF UPC1876GT Data sheet ( Hoja de datos )
| Número de pieza | UPC1876GT | |
| Descripción | US MTS DECODER | |
| Fabricantes | NEC | |
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DATA SHEET
BIPOLAR ANALOG INTEGRATED CIRCUIT
µPC1876
US MTS DECODER
DESCRIPTION
The µPC1876 is an integrated circuit for US MTS (Multi Channel Television Sound) system. All functions for US
MTS system are provided on one chip. The µPC1876 has built-in SAP (Sub Audio Program) discrimination error
protection circuit.
FEATURES
• BTSC (USA) standard demodulator (Stereo demodulation and TV-dbx noise reduction)
• Only four adjustments (2 separation, 1 stereo VCO, 1 filter)
• Supply voltage: 8 V to 10 V
• Circuit current: 27 mA TYP. (Supply voltage: 9 V)
• Input and output level (L+R, 100% modulation)
Input level: 0.42 Vp-p
Output level: 1.41 Vp-p
APPLICATION
• TV sets and VCRs for North America
ORDERING INFORMATION
Part Number
µPC1876GT
Package
42-pin plastic SSOP (9.53 mm (375))
The µPC1876 is available only to licensees of THAT Corporation.
Please contact: (03) 5790-5391 (Japan)
(508) 229-2500 (USA)
The information in this document is subject to change without notice. Before using this document, please
confirm that this is the latest version.
Document No. S11666EJ4V0DS00 (4th edition)
Date Published June 2000 N CP(K)
Printed in Japan
The mark shows major revised points.
©
1996
1 page  
µPC1876
CONTENTS
1. INTERNAL EQUIVALENT CIRCUITS ............................................................................................ 6
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 FUNCTION ........................................................................................ 18
3.1 Mode Matrix Table ................................................................................................................... 18
3.2 MATRIX MUTE Pin .................................................................................................................. 18
3.3 F-MONAURAL SELECTION Pin ............................................................................................. 19
3.4 STEREO/SAP SWITCH Pin ..................................................................................................... 19
3.5 SAP 1/2 SWITCH Pin ............................................................................................................... 19
4. PRECAUTIONS ............................................................................................................................... 20
4.1 Impedance of Input Pins and Output Pins ........................................................................... 20
4.2 Output Load Impedance ........................................................................................................ 20
4.3 Cautions on External Components ....................................................................................... 21
4.4 Change of Electrical Characteristics Depending on External Components ..................... 21
4.5 BIAS (1.5 V) Pin ....................................................................................................................... 21
5. ADJUSTMENT PROCEDURE ........................................................................................................ 22
5.1 Stereo VCO Adjustment ......................................................................................................... 22
5.2 Filter Adjustment .................................................................................................................... 22
5.3 Separation Adjustment .......................................................................................................... 22
5.4 SAP VCO Adjustment ............................................................................................................. 23
5.5 List of Pin Settings in Adjustment ........................................................................................ 23
6. ELECTRICAL SPECIFICATIONS ................................................................................................... 24
7. MEASURING CIRCUIT ................................................................................................................... 35
8. DIFFERENCES BETWEEN THE µPC1876GT AND µPC1872GT ............................................. 36
9. PACKAGE DRAWING ..................................................................................................................... 37
10. RECOMMENDED SOLDERING CONDITIONS ............................................................................. 38
Data Sheet S11666EJ4V0DS00
5
5 Page 
Pin Number
Pin Name
35 BIAS (1.5 V)
Symbol
1.5 V
µPC1876
Internal Equivalent Circuit
20 kΩ 20 kΩ
VCC
(6/7)
36 SAP VCO SETTING
37 FILTER ADJUSTMENT
SAPVA
FLTA
5 pF
5 kΩ
2.5 kΩ
5 kΩ
35
25 kΩ
12.5 kΩ
GND
20 kΩ
VCC
20 kΩ 20 kΩ
20 kΩ
36
37
38 STEREO VCO SETTING STVA
1 kΩ
5 kΩ
1 kΩ
GND
10 kΩ 10 kΩ
VCC
20 pF
10 kΩ
38
10 kΩ
1 kΩ
30 kΩ
GND
Data Sheet S11666EJ4V0DS00
11
11 Page | ||
| Páginas | Total 40 Páginas | |
| PDF Descargar | [ Datasheet UPC1876GT.PDF ] | |
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