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MC44BS374T1D-R2 数据表(PDF) 14 Page - Freescale Semiconductor, Inc

部件名 MC44BS374T1D-R2
功能描述  PLL Tuned UHF and VHF Audio/Video High Integration Modulator
PDF  34 Pages
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制造商  FREESCALE [Freescale Semiconductor, Inc]
网页  http://www.freescale.com
标志 FREESCALE - Freescale Semiconductor, Inc

MC44BS374T1D-R2 数据表(HTML) 14 Page - Freescale Semiconductor, Inc

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MC44BS374T1/374T1A Advance Information
Audio Characteristics
Figure 5. Typical Video Performance
14 Audio Characteristics
Unless otherwise stated: Vcc=5.0V, Ambient Temperture=25
o C, Video Input 1V
p-p, 10-step grayscale.
RF inputs/outputs into 75Ohm load.
Note:
Specifications only valid for envelope demodulation.
Table 6. Audio Performance Characteristics
Parameter
Test Conditions
Min
Typ
Max
Unit
Type
Picture-to-Sound ratio
PS bit set to 0
PS bit set to 1
9
13
12
16
15
19
dB
B
Audio modulation depth
Using specific pre-emphasis circuit,
audio input level=205mVrms-audio frequency=1kHz
FM modulation: Fs=5.5, 6 or 6.5MHz
100% modulation=+/-50kHz FM
deviation
76
80
84
%
B
FM modulation: NTSC Fs=4.5MHz
100% modulation=+/-25kHz FM
deviation
76
80
84
%
B
Audio input resistance
45
53
61
K
Ω
A
Audio Frequency
response
Reference 0dB at 1kHz,
using specified pre-emphasis circuit,
measure from 50Hz to 15kHz
Depends on loop filter components
-2.0
-
+2.0
dB
C
Audio Distortion FM (THD
only)
at 1kHz, 100% modulation (
±50kHz)
No video
-
0.2
0.8
%
C
Audio S/N with Sync Buzz
FM
Ref 1Khz, 50% modulation (+/-25Khz)
EBU color bars Video signal,
using CCIR 468.2 weighting filter
50
54
-
dB
C
Note:
2: See “Characterization Measurement Conditions” on page 15.
PAL Video Modulation Depth
74
76
78
80
82
84
86
88
90
471
521
571
621
671
721
771
821
871
Frequency (Mhz)
Typical
Maximum specification
Minimum specification
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com



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