NEC UPC1892CT-02, UPC1892CT Datasheet

DATA SHEET

Bipolar Analog Integrated Circuit

µ

PC1892

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.

µ

PC1892 provides wide sound with two speakers, and rich stereophonic sound with three speakers.

The

µ

In case of stereo signal, the
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
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.

PC1892 has the movie mode to reproduce sense of immediacy (for movie) and the music mode

µ

PC1892 has a general sound processor that has volume, balance,

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

•

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PC1892CT-02: The volume and balance attenuation are bigger than µPC1892CT.

APPLICATION

•TV

ORDERING INFORMATION

Part Number Package

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PC1892CT 30-pin plastic shrink DIP (400 mil)

µ

PC1892CT-02 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

SYSTEM BLOCK DIAGRAM (TV)

µ

PC1892

PD17002

µ

PD17052

µ

PD17053

µ

PC2800A

µ

PC2801A

µ

Tuner PIF&SIF

Digital tuning
controller

PC1852

µ

Remote
control
reception
amplifier

PIN photo diode

US MTS

Color, intensity
and defrecting
signal processor

µ

L

R

PC1892

Matrix surround
sound processor

Color
output

Vertical
output

Power amplifier

PC1310

µ

PC1316C

µ

CRT

CRT

2

BLOCK DIAGRAM

L

R

IN

22 F

IN

22 F

HPF

820 kΩ

0.1 F

0.082 F

µ

28 29 2 3 4 5 30 22 21 1 20 19 18

+

25

µ

LPF

+

26

1

–
+

–
+

Movie/
Music

L–R

Simulated

2200 pF

µ

FC1 FC2 FC3 FC4

PS1

PHASE SHIFTER

µ

1

CC

V

2

+

µ

Note Recommended Precision: ±1 %

680 pF22 F

MODE
CONTROL

1 kΩ

0.022 F

PS2 PS3 PS4

Music

1 kΩ

MS2MS1

µ

0.022 F 1000 pF

µ

Simulated/Movie

10 kΩ

(L–R)

ϕ

+5 V

EFFECT

LPF

2

CONTROL

510 Ω

EFFECT
CONTROL

1 F

µ

+

6

Surround

OFFSET

ABSORPTION

OFF

1

V

CC

2

Note Note

6800 pF

MATRIX

Note Note

0.15 F V

TONE
(BASS, TREBLE)
CONTROL

TONE
(BASS, TREBLE)
CONTROL

0.15 F6800 pF

µ

DC CONTROL

µ

BALANCE
CONTROL

CC

10 kΩ

VOLUME

VOLUME

VOLUME
CONTROL

GND

10 kΩ

VOLUME
CONTROL

10 kΩ

510 Ω 510 Ω

BALANCE

CONTROL

BALANCE

CONTROL

1715111023872724

510 Ω

BASS
CONTROL

+5 V

10 kΩ

16

510 Ω

TREBLE
CONTROL

10 kΩ

L + R
VOLUME
CONTROL

510 Ω

+5 V

L OUTPUT

ϕ

L+ (L–R)

+

14

µ

4.7 F

REAR OUTPUT

ϕ

(L–R)

+

9

4.7 F

µ

R OUTPUT

ϕ

R– (L–R)

+

12

µ

4.7 F

L+R OUTPUT
L+R

+

13

4.7 F

µ

µ

PC1892

3

PIN CONFIGURATIONS (Top View)

µ

PC1892

30 Low Pass Filter2

1VCCSupply Voltage

LF2

2 FC1Phase Shift Filter1

3 FC2Phase Shift Filter2

4 FC3Phase Shift Filter3

5 FC4Phase Shift Filter4

6OFOffset Filter

µ

µ

PC1892CT

7 MS1Mode Select1

8 MS2Mode Select2

9 REARoutRear Output

10 RTCR-ch Treble Capacitor

11 RBCR-ch Bass Capacitor

12 RoutR-ch Signal Output

13 L + RoutL+R-ch Signal Output

14 LoutL-ch Signal Output

PC1892CT-02

29 Monaural Filter InputMFI

28 Monaural Filter OutputMFO

27 Low Pass Filter1LF1

IN

26 R-ch Signal InputR

25 L-ch Signal InputLIN

24 Reference VoltageRF

23 Effect ControlEFF

22 L-ch Treble CapacitorLTC

21 L-ch Bass CapacitorLBC

20 Balance ControlBAL

19 Volume ControlVOL

18 L+R-ch Volume ControlL + R

17 Bass ControlBAS

15 GNDGround

16 Treble ControlTBL

4

µ

PC1892

MODE SELECT CODE

Select among OFF, Movie, Music and Simulated mode by MS1 and MS2 (Pins 7 and 8).

Code MS1 MS2

Mode (Pin 7) (Pin 8)

OFF L L
Music H L
Movie L H

Simulated 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 V

Remark About "H" and "L", refer to RECOMMENDED OPERATING CONDITIONS.

CC (pin 1).

5

µ

PC1892

Explanation of Pins (1/4)

Pin number/name Equivalent circuit Description

1 Power supply VCC Power supply pin.
2 Phase shift filter1 (Pins 3, 4 and 5 are same as pin 2.) Capacitor connection pin which determines time

3 Phase shift filter2 constant of phase shifter.

V

4 Phase shift filter3 Pin 2 is used for movie, music, simulated mode.
5 Phase shift filter4 Pins 2, 3, 4, 5 is used for movie, simulated mode.

V

10 kΩ

CC

21 kΩ

18 kΩ 3 kΩ

V

CC

21 kΩ

CC

5 A

µ

Recommended value of capacitor is as follows.

Pin 2: 0.1 µF
Pin 3: 2200 pF
Pin 4, 5: 0.022 µF

2

6 Offset filter Capacitor connection pin which absorbs offset

10 kΩ

7 Mode select1 (Pin 8 is same as pin 7.) Surround mode switch pin.
8 Mode select2 Control by pin 7, 8 (2 bit parallel).

1 kΩ

V

CC

50 kΩ 3 kΩ

V

7

CC

50 kΩ

voltage generated by phase shifter.

µ

25 A

6

+

1 F

µ

–

Input impedance:approx. 100 kΩ.

50 kΩ

6

Explanation of Pins (2/4)

Pin number/name Equivalent circuit Description

9 Rear output (Pins 12, 13 and 14 are same as pin 9.)
12 R-ch signal output
13 L+R-ch signal output
14 L-ch signal output

5 kΩ

1 kΩ

V

CC

V

CC

4.7 F

µ

+

9

µ

PC1892

5 kΩ

5 kΩ

10 kΩ

10 R-ch treble capacitor (Pin 22 is same as pin 10.)
22 L-ch treble capacitor

V

CC

7.5 kΩ

5.8 kΩ 3 kΩ
V

CC

3 kΩ

3 kΩ

10 kΩ

25 A

µ

10

6800 pF

(±1 %)

11 R-ch bass capacitor (Pin 21 is same as pin 1.)
21 L-ch bass capacitor

V

CC

1

V

CC

2

7.5 kΩ

5.3 kΩ 3 kΩ
V

CC

3 kΩ

10 kΩ

3 kΩ

25 A

µ

11

0.15 F

µ

(±1 %)

15 GND GND GND pin.

7

Explanation of Pins (3/4)

Pin number/name Equivalent circuit Description
16 Treble control (Pins 17, 18, 19 and 20 are same as pin 16.) Sound control pin.
17 Bass control
18 L+R-ch volume control
19 Volume control
20 Balance control

16

75 kΩ

75 kΩ

23 Effect control Surround effect control pin.

40 A

µ

40 A

µ

V

CC

V

CC

Input impedance: approx. 100 kΩ.

µ

PC1892

23

50 kΩ

50 kΩ

24 Reference voltage

V

CC

CC

V

20 kΩ

24

+

22 F

–

µ

20 kΩ

10 kΩ

3 kΩ

25 L-ch signal input (Pin 26 is same as pin 25.) Input impedance: approx. 40 kΩ.
26 R-ch signal input

1

VCC

2

CC

V

18.3 k

VCC

µ

Ω

5 A

+–

25

18.3 k

µ

22 F

Ω

8

µ

PC1892

Explanation of Pins (4/4)

Pin number/name Equivalent circuit Description
27 Low pass filter1 Pins 28, 29 are for HPF at simulated mode.
28 Monaural filter output Connect capacitor and resistor between pin 28
29 Monaural filter input and 29.

V

CC

10

V

CC

1

Ω

k

V

V

CC

2

47

15 k

Ω

k

Ω

15 k

Ω

V

CC

47 k

10 k

Ω

1 k

CC

5 A

Ω

27
680 pF

Ω

µ

V

CC

V

28
29

CC

18 k

3 k

Ω

Ω

µ

0.082 F
820 k

V

CC

µ

5 A

Ω

30 Low pass filter2

10 k

V

V

CC

3 k

17.7 k

Ω

V

CC

Ω

CC

µ

5 A

Ω

30

1000 pF

9

µ

PC1892

ELECTRICAL CHARACTERISTICS

Absolute Maximum Ratings (at TA = 25 °C)

Parameter Symbol Conditions Ratings Unit
Supply voltage VCC No signal, OFF mode 14.0 V
Input signal level VIN Pin 25, 26 Input voltage VCC V
Control pin voltage VCONT Pin 16, 17, 18, 19, 20, 23 Apply voltage VCC + 0.2 V
Package power dissipation PD TA = 75 °C 640 mW
Operating temperature TA VCC = 12 V –20 to +75 °C
Storage temperature Tstg –40 to +125 °C

Recommended Operating Conditions

Parameter Symbol Conditions MIN. TYP. MAX. Unit

Supply voltage VCC No signal, OFF mode 10.8 12.0 13.2 V

VCC = 12 V, OFF mode, T.H.D = 1 %

Input signal level 1 VIN1 Volume control voltage = 5.0 V – 1.4 8.5 Vp-p

Balance, bass, treble control voltage = 2.5 V

Input signal level 2 VIN2 – 1.4 8.5 Vp-p

Output load impedance PL 10 kΩ

Mode select pin voltage (H) VMSH Pin 7, 8 Apply voltage 3.5 5.0 VCC V
Mode select pin voltage (L) VMSL Pin 7, 8 Apply voltage 0 0 2.0 V
Effect pin voltage (H) VEFFH Pin 23 Upper limit voltage – 5.0 VCC V
Effect pin voltage (L) VEFFL Pin 23 Lower limit voltage 0 0 – V
Control pin voltage (H) VCONTH Pin 16, 17, 18, 19, 20 Apply voltage – 5.0 VCC V
Control pin voltage (L) V CONTL Pin 16, 17, 18, 19, 20 Apply voltage 0 0 – V

VCC = 12 V, T.H.D = 1 %
L+R volume control voltage = 5.0 V

AC load impedance which can be driven
by output of pin 9, 12, 13, 14

10

Electrical characteristics (TA = 25 °C, RH ≤ 70 %, VCC = 12 V)

General

µ

PC1892

Parameter Symbol Test conditions

Supply current ICC No signal – – – – OFF 23 29 37 mA
Maximum output voltage VOM VCC = 12 V, T.H.D. = 1 % H M M M OFF 8.5 9.9 Vp-p
Distortion factor T.H.D. VIN = 0.5 Vr.m.s., f = 1 kHz H M M M OFF – 0.1 0.5 %
L+R distortion factor T.H.D. (L+R) VIN = 0.5 Vr.m.s., f = 1 kHz, – – – – – – 0.1 0.5 %

L+R volume control voltage:

5.0 V

Note 1

Control pin voltage

(V)

Balance

Treble

Volume

Note 1

Bass

MIN. TYP. MAX. Unit

Note 2

Surround mode

Note 1. H: 5.0 V, M: 2.5 V, L: 0 V, –: Undefined

2. OFF: OFF mode, –: Undefined

11

µ

PC1892CT Volume control, tone control block (1/1)

µ

PC1892

Parameter Symbol Test conditions

Volume attenuation ATTVOL VIN = 0.5 Vr.m.s., f = 1 kHz, H M M M OFF – –80 –72 dB

Volume control voltage: 0.2 V ↓
0 dB: Volume control voltage = H 0.2
Filter: JIS-A

L+R volume attenuation ATTL+RVOL VIN = 0.5 Vr.m.s., f = 1 kHz, – – – – – – –85 –75 dB

L+R volume control voltage:

0.2 V
0 dB: L+R volume control
voltage = H
Filter: JIS-A

Balance attenuation L-ch ATTBALL V IN = 0.5 Vr.m.s., f = 1 kHz, H M M M OFF –22 –18 –12 dB

Balance control voltage: 4.5 V ↓
0 dB: Balance control voltage = M 4. 5
Filter: JIS-A

Balance attenuation R-ch ATTBALR VIN = 0.5 Vr.m.s., f = 1 kHz, H M M M OFF –22 –18 –12 dB

Balance control voltage: 0.5 V ↓
0 dB: Balance control voltage = M 0. 5
Filter: JIS-A

Low-band boost control VBB VIN = 0.5 Vr.m.s., f = 100 Hz, H M M M OFF 7 10 13 dB

Bass control voltage: 4.5 V ↓
0 dB: Bass control voltage = M 4.5

Low-band cut control VBC VIN = 0.5 Vr.m.s., f = 100 Hz, H M M M OFF –13 –10 –7 dB

Bass control voltage: 0.5 V ↓
0 dB: Bass control voltage = M 0.5

High-band boost control VTB VIN = 0.5 Vr.m.s., f = 10 kHz, H M M M OFF 7 10 13 dB

Treble control voltage: 4.5 V ↓
0 dB: Treble control voltage = M 4.5

High-band cut control VTC VIN = 0.5 Vr.m.s., f = 10 kHz, H M M M OFF –13 –10 –7 dB

Treble control voltage: 0.5 V ↓
0 dB: Treble control voltage = M 0.5

Note 1

Control pin voltage

(V)

Volume

Balance

Note 1

Treble

Note 2

Bass

MIN. TYP. MAX. Unit

Surround mode

Note 1. H: 5.0 V, M: 2.5 V, L: 0 V, –: Undefined, The alphanumeric numbers in this table represent the level (V).

2. OFF: OFF mode, –: Undefined

12

µ

PC1892CT-02 Volume control, tone control block (1/1)

µ

PC1892

Parameter Symbol Test conditions

Volume attenuation ATTVOL VIN = 0.5 Vr.m.s., f = 1 kHz, H M M M OFF – – –90 dB

Volume control voltage: 0.2 V ↓
0 dB: Volume control voltage = H 0.2
Filter: JIS-A

L+R volume attenuation ATTL+RVOL VIN = 0.5 Vr.m.s., f = 1 kHz, – – – – – – –85 –75 dB

L+R volume control voltage:

0.2 V
0 dB: L+R volume control
voltage = H
Filter: JIS-A

Balance attenuation 1 ATTBALL1 VIN = 0.5 Vr.m.s., f = 1 kHz, H M M M OFF –19 –16 –10 dB
L-ch Balance control voltage: 4.3 V ↓

0 dB: Balance control voltage = M 4. 3
Filter: JIS-A

Balance attenuation 2 ATTBALL2 VIN = 0.5 Vr.m.s., f = 1 kHz, H M M M OFF – – –90 dB
L-ch Balance control voltage: 5 V ↓

0 dB: Balance control voltage = M 5. 0
Filter: JIS-A

Balance attenuation 1 ATTBALR1 VIN = 0.5 Vr.m.s., f = 1 kHz, H M M M OFF –19 –16 –10 dB
R-ch Balance control voltage: 0.7 V ↓

0 dB: Balance control voltage = M 0. 7
Filter: JIS-A

Balance attenuation 2 ATTBALR2 VIN = 0.5 Vr.m.s., f = 1 kHz, H M M M OFF – – –90 dB
R-ch Balance control voltage: 0 V ↓

0 dB: Balance control voltage = M 0. 0
Filter: JIS-A

Low-band boost control VBB VIN = 0.5 Vr.m.s., f = 100 Hz, H M M M OFF 7 10 13 dB

Bass control voltage: 4.5 V ↓
0 dB: Bass control voltage = M 4.5

Low-band cut control VBC VIN = 0.5 V r.m.s., f = 100 Hz, H M M M OFF –13 –10 –7 dB

Bass control voltage: 0.5 V ↓
0 dB: Bass control voltage = M 0.5

High-band boost control VTB VIN = 0.5 Vr.m.s., f = 10 kHz, H M M M OFF 7 10 13 dB

Treble control voltage: 4.5 V ↓
0 dB: Treble control voltage = M 4.5

High-band cut control VTC VIN = 0.5 Vr.m.s., f = 10 kHz, H M M M OFF –13 –10 –7 dB

Treble control voltage: 0.5 V ↓
0 dB: Treble control voltage = M 0.5

Note 1

Control pin voltage

(V)

Balance

Treble

Volume

Note 1

Bass

MIN. TYP. MAX. Unit

Note 2

Surround mode

Note 1. H: 5.0 V, M: 2.5 V, L: 0 V, –: Undefined, The alphanumeric numbers in this table represent the level (V).

2. OFF: OFF mode, –: Undefined

13