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PDF TA8874Z Data sheet ( Hoja de datos )
| Número de pieza | TA8874Z | |
| Descripción | SOUND MULTIPLEX BROADCAST DEMODULATOR IC FOR DOMESTIC TV/VTR | |
| Fabricantes | Toshiba Semiconductor | |
| Logotipo |  |
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TA8874Z
TOSHIBA BIPOLAR LINEAR INTEGRATED CIRCUIT SILICON MONOLITHIC
TA8874Z
SOUND MULTIPLEX BROADCAST DEMODULATOR IC FOR DOMESTIC TV / VTR
The TA8874Z stores a function necessary for demodulating
domestic TV sound multiplex broadcast and trap for eliminating
facsimile broadcasting signals that superimpose within the sound
multiplex broadcast bandwidth.
Furthermore no adjustment other than separation is necessary by
using a 32fH oscillation.
Using an I2C bus it switches an output mode and performs
separation adjustment and broadcast mode read out.
FEATURES
l Band pass filter for sub audio signal
l FM demodulator for sub audio signal
l Stereo matrix
l Main / sub de-emphasis
l Output for stereo / bilingual indication
l Trap for facsimile broadcast (4.5fH, 6fH)
l Various controls by I2C bus
Weight: 1.0 g (Typ.)
000707EBA1
· TOSHIBA is continually working to improve the quality and reliability of its products. Nevertheless, semiconductor devices in general
can malfunction or fail due to their inherent electrical sensitivity and vulnerability to physical stress. It is the responsibility of the
buyer, when utilizing TOSHIBA products, to comply with the standards of safety in making a safe design for the entire system, and
to avoid situations in which a malfunction or failure of such TOSHIBA products could cause loss of human life, bodily injury or
damage to property.
In developing your designs, please ensure that TOSHIBA products are used within specified operating ranges as set forth in the
most recent TOSHIBA products specifications. Also, please keep in mind the precautions and conditions set forth in the “Handling
Guide for Semiconductor Devices,” or “TOSHIBA Semiconductor Reliability Handbook” etc..
· The TOSHIBA products listed in this document are intended for usage in general electronics applications (computer, personal
equipment, office equipment, measuring equipment, industrial robotics, domestic appliances, etc.). These TOSHIBA products are
neither intended nor warranted for usage in equipment that requires extraordinarily high quality and/or reliability or a malfunction or
failure of which may cause loss of human life or bodily injury (“Unintended Usage”). Unintended Usage include atomic energy
control instruments, airplane or spaceship instruments, transportation instruments, traffic signal instruments, combustion control
instruments, medical instruments, all types of safety devices, etc.. Unintended Usage of TOSHIBA products listed in this document
shall be made at the customer’s own risk.
· The products described in this document are subject to the foreign exchange and foreign trade laws.
· The information contained herein is presented only as a guide for the applications of our products. No responsibility is assumed by
TOSHIBA CORPORATION for any infringements of intellectual property or other rights of the third parties which may result from its
use. No license is granted by implication or otherwise under any intellectual property or other rights of TOSHIBA CORPORATION or
others.
· The information contained herein is subject to change without notice.
2001-01-15 1/14
1 page  
TA8874Z
2001-01-15 5/14
5 Page 
TA8874Z
MEASUREMENT CONDITION
NOTE
INPUT SIGNAL
1 31.5kHz, 50mVp-p CW
2 15.75kHz, 50mVp-p CW
3 47.2kHz, 50mVp-p CW
4 55.07kHz, 50mVp-p CW
5 70.8kHz, 50mVp-p CW
6 94.4kHz, 50mVp-p CW
MONO : 400Hz, 250mVrms
7
SUB : 400Hz, 150mVrms,
100% modulation
BIL.Q signal
MONO : 100Hz, 250mVrms
8
SUB : 100Hz, 150mVrms
100% modulation
BIL.Q signal
9 MONO : 10kHz, 250mVrms
SUB : 10kHz, 150mVrms,
10 100% modulation
BIL.Q signal
11 MONO : 1kHz, 250mVrms
12
SUB : 1kHz, 150mVrms,
100% modulation
13 MONO : 1kHz, 250mVrms
14
SUB : 1kHz, 150mVrms,
100% modulation
15 MONO : 1kHz, 250mVrms
16
SUB : 1kHz, 150mVrms,
100% modulation
17 SUB carrier, BIL.Q signal
18 SUB carrier, BIL.Q signal
19
Only R-ch 100% modulation,
STE.Q signal
20 BIL.Q signal
21 BIL.Q signal
FILTER
—
APPLIED
VOLTAGE
—
MEASURE-
MENT PIN
V13
MEASUREMENT METHOD
Measure output signal amplitude exclusive of
pin 13 external capacitance.
——
V13 Set 2fH level to 0dB reference.
15kHz
LPF
SUB :
V4 = 5V
V8, V9
Output : measure V8 and 9 output level.
Output level difference : 20 log (V8 / V9)
15kHz
LPF
SUB :
V4 = 5V
—
15kHz
LPF
15kHz
LPE
1kHz
BPF
—
—
1kHz
BPF
—
—
V4 = 5V
—
V4 = 5V
—
V4 = 5V
V4 = 5V
V4 = 0V
V4 = 0V
V4 = 5V
—
—
—
V8, V9
Measure level at 1kHz first and compare to its
level.
V8, V9
V8, V9
V8, V9
V8, V9
V8, V9
V8, V9
V8, V9
V8, V9
V8, V9
V1
18Pin
LED
Measure distortion factor of output.
Measure distortion factor of output.
Compare when no signal.
Compare when no signal.
Measure output leakage signal in SUB mode.
Measure output leakage signal in MAIN mode.
Measure residual carrier (31.5kHz)
Measure residual carrier (63.0kHz)
Measure comparison with signal outputted to
L when R is 1.
Measure 922.5Hz detection output.
Measure level difference until pin 18 LED
lamp extinguishes, lowering level from
56.6mVp-p.
2001-01-15 11/14
11 Page | ||
| Páginas | Total 14 Páginas | |
| PDF Descargar | [ Datasheet TA8874Z.PDF ] | |
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