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| 型號： | MC44302ADW |
| 廠商： | MOTOROLA INC |
| 元件分類： | 消費(fèi)家電 |
| 英文描述： | ADVANCED MULTI-STANDARD VIDEO/SOUND IF |
| 中文描述： | SPECIALTY CONSUMER CIRCUIT, PDSO28 |
| 封裝： | PLASTIC, SO-28 |
| 文件頁數(shù)： | 13/28頁 |
| 文件大?。?/td> | 612K |
| 代理商： | MC44302ADW |
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MC44302A
13
MOTOROLA ANALOG IC DEVICE DATA
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Table 1. Audio Input/Audio–Video Switch
to Pin 3
3.4 V to 5.0 V
Audio
1
á
á
áááááááááááááááá
áááááááááá
Video
CC
Constant
ááááááááááááááááá
Variable
2
Internal Audio
(AM or FM)
Negative
á
á
ááááááá
ááááááá
Positive
áááááááááááááááááááááááááááááá
áá
áá
áá
áá
áá
áá
áááááááááááááááááááááááááááááááá
2.The Variable output audio level is controlled by Pin 1.
Video 1
á
á
áá
áá
á
á
á
áááááááááááááááááááááááá
á
á
External
1.8 V to 2.2 V
ááááá
ááááá
á
á
á
áááá
áááá
(AM or FM)
áááá
áááá
áááá
áááá
á
á
á
á
ááá
ááá
(AM or FM)
ááá
ááá
Internal Audio
(AM or FM)
á
á
External Audio
ááááá
ááááá
á
á
á
á
ááááá
ááááá
ááááá
ááááá
ááááá
á
á
á
á
áá
áá
ááááá
ááááá
ááááá
0.6 V to 0.9 V
22 k
to Ground
Internal Audio
ááááá
ááááá
Negative Video
Positive Video
á
áá
á
ááááá
or
–
á
3.3 k
to Ground
or
á
Internal Audio
(AM or FM)
á
ááááá
á
ááááá
Negative Video
á
Positive Video
with
á
áá
á
á
á
á
ááááá
with
á
á
á
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System
Polarity
(V)
Loading
Method
Pin #
Active
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ááááááááááááááááááááááááááááá
á
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á
áááááááááá
á
á
áááááááááá
ááááááááá
áááá
áááááááááááááá
áááá
ááááááááá
Modulation
Pin #
PAL 1
Negative
4.0 to 5.0
áá
ááááááááááááááááááááá
áá
ááááááááááááááááááááá
áá
áá
ááááááááááááááááááááá
á
á
áá
áá
áá
áá
AM & FM
Inhibited
áá
áá
áá
áá
NTSC
á
áááá
SECAM
á
ááá
ááá
1.9 to 3.0
á
á
ááááá
Sync Tip Keyed
ááááá
ááááá
Peak Detected Video
Black Level
Open
ááááá
á
ááá
ááá
ááá
14
Black Level
ááá
á
14
á
áá
áá
áá
–
FM
áá
á
áá
27, FM
áá
áá
24, AM
AM
áá
á
24, FM
á
áááá
áááá
Negative
áááá
ááá
ááá
Ground
á
á
á
á
á
á
á
á
Positive
á
á
á
Open
á
Black Level
á
á
á
á
á
á
á
á
Open
Multi–Standard Operating Modes
The MC44302A is designed to operate properly with PAL
(B, G, I,) SECAM (L), and NTSC (M) television transmission
standards. There are two multifunction inputs that are used
to select the proper control methods for video
demodulation, sound intercarrier demodulation, and AGC.
This keeps the sense of the video signal at the outputs the
same, whether positive or negative modulation is being
received. Refer to Table 2 and the following operating
description.
The PAL, NTSC, and SECAM standard are each selected
by applying a specific dc voltage level to the Video Mode
Switch at Pin 10. With PAL 1 selected, AGC is keyed on the
sync pulse by the horizontal PLL which is locked to the
flyback or video sync pulse present at Pin 17. The FM sound
IF and detector is active with the demodulated audio
appearing at Pins 24 and 27. The PAL 2 selection is identical
to PAL 1 with the addition of sound muting when the
Acquisition Circuit is unlocked or vertical sync is absent. With
SECAM selected, the video level is established by both, a
long time constant peak white detector, and a back porch
keyed AGC that corrects for transmitted black level errors
while maintaining fast AGC response. The AM sound
detector is active with the demodulated audio appearing at
Pins 24 and 27. With NTSC selected, AGC and sound muting
is the same as for PAL 1 mode. The FM and AM detectors are
both active with the FM output at Pin 27 and the AM output at
Pin 24. The AM output can be used to obtain the sync signal,
in suppressed sync scrambling systems, that is amplitude
modulated on the sound carrier.
Signal Acquisition and AFT
The automatic fine tuning (AFT) portion of this integrated
circuit is unconventional in form. AFT control is derived by
amplifying the phase detector error voltage and applying it to
the tuner local oscillator (LO) after phase lock is established.
This method eliminates the need for a discriminator coil along
with the associated alignment, and the potential for IF
instability due to coil radiation.
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相關(guān)代理商/技術(shù)參數(shù) |
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| MC44302AP | 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:ADVANCED MULTI-STANDARD VIDEO/SOUND IF |
| MC4433 | 制造商:SHENZHENFREESCALE 制造商全稱:ShenZhen FreesCale Electronics. Co., Ltd 功能描述:P-Channel 30-V (D-S) MOSFET Fast switching speed |
| MC4435 | 制造商:SHENZHENFREESCALE 制造商全稱:ShenZhen FreesCale Electronics. Co., Ltd 功能描述:P-Channel 30-V (D-S) MOSFET Fast switching speed |
| MC44353 | 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:MULTI.STANDARD AND PAL/NTSC MODULATOR ICs |
| MC44353DTB | 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:MULTI.STANDARD AND PAL/NTSC MODULATOR ICs |
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