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PDF UPC1892CT-02 Data sheet ( Hoja de datos )
| Número de pieza | UPC1892CT-02 | |
| Descripción | MATRIX SURROUND SOUND PROCESSOR WITH SOUND PROCESSOR | |
| Fabricantes | NEC | |
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DATA SHEET
Bipolar Analog Integrated Circuit
µPC1892
MATRIX SURROUND SOUND PROCESSOR
WITH SOUND PROCESSOR
The µPC1892 is a specific IC to reproduce surround sound by using phase shifters and a signal matrix.
The µPC1892 provides wide sound with two speakers, and rich stereophonic sound with three speakers.
In case of stereo signal, the µPC1892 has the movie mode to reproduce sense of immediacy (for movie) and the music mode
to emphasize vocal sound (for music), and it has the simulated mode to make monaural signal into wide deep sound. The modes
can be selected freely by using 2-bit parallel control pins.
In addition to this function reproducing surround sound, the µPC1892 has a general sound processor that has volume, balance,
bass and treble control. So it is capable of reducing installation area.
All functions for processing signals of base band sound are provided on one chip.
FEATURES
• Three surround modes are available: movie, music and simulated
• Built in volume and balance control (All control voltage: 0 V to 5 V)
• Built in tone control (bass, treble) (All control voltage: 0 V to 5 V)
• Built in L+R output for woofer SP
• µPC1892CT-02: The volume and balance attenuation are bigger than µPC1892CT.
APPLICATION
• TV
ORDERING INFORMATION
Part Number
µPC1892CT
µPC1892CT-02
Package
30-pin plastic shrink DIP (400 mil)
30-pin plastic shrink DIP (400 mil)
The information in this document is subject to change without notice.
Document No. S10650EJ3V0DS00 (3rd edition)
(Previous No. ID-2902)
Date Published October 1995 P
Printed in Japan
©
1991, 1992, 1995
1 page  
µPC1892
MODE SELECT CODE
Select among OFF, Movie, Music and Simulated mode by MS1 and MS2 (Pins 7 and 8).
Code
Mode
OFF
Music
Movie
Simulated
MS1
(Pin 7)
L
H
L
H
MS2
(Pin 8)
L
L
H
H
Cautions 1. In the case of changing surround mode and power ON/OFF, mute (approx. 200 ms) must be used for pop
noise reduction.
2. Insert resistors between mode select pins (pin 7, 8) and GND, between control pins (pin 16, 17, 18, 19, 20,
23) and GND.
3. Connect a electrolytic capacitor for power supply as close as possible to VCC (pin 1).
Remark About "H" and "L", refer to RECOMMENDED OPERATING CONDITIONS.
5
5 Page 
Electrical characteristics (TA = 25 °C, RH ≤ 70 %, VCC = 12 V)
General
Parameter
Symbol
Test conditions Note 1
µPC1892
Note 1 Note 2
Control pin voltage
(V)
MIN. TYP. MAX. Unit
Supply current ICC No signal
Maximum output voltage VOM
VCC = 12 V, T.H.D. = 1 %
Distortion factor
T.H.D.
VIN = 0.5 Vr.m.s., f = 1 kHz
L+R distortion factor
T.H.D. (L+R)
VIN = 0.5 Vr.m.s., f = 1 kHz,
L+R volume control voltage:
5.0 V
Note 1. H: 5.0 V, M: 2.5 V, L: 0 V, –: Undefined
2. OFF: OFF mode, –: Undefined
– – – – OFF 23 29 37 mA
H M M M OFF 8.5 9.9
Vp-p
H M M M OFF – 0.1 0.5 %
– – – – – – 0.1 0.5 %
11
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