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MC44BC373CDR2 Datasheet(PDF) 11 Page - Freescale Semiconductor, Inc

Part # MC44BC373CDR2
Description  PLL Tuned UHF and VHF Audio/Video High Integration Modulator
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Manufacturer  FREESCALE [Freescale Semiconductor, Inc]
Direct Link  http://www.freescale.com
Logo FREESCALE - Freescale Semiconductor, Inc

MC44BC373CDR2 Datasheet(HTML) 11 Page - Freescale Semiconductor, Inc

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Audio Characteristics
MC44BC373C/374C Technical Data
11 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. SPECIFICATIONS ONLY VALID FOR ENVELOPE
DEMODULATION.
Figure 5. Typical Performances
Parameter
Test Conditions
Min
Typ
Max
Unit
Type
Picture-to-Sound ratio
PS bit set to 0
PS bit set to 1
13
9
16
12
19
15
dB
B
Audio modulation depth
Using specific pre-emphasis circuit,
audio input level=205mVrms–audio frequency=1kHz
AM modulation: SECAM Fs=6.5MHz
—
80
—
%
B
FM modulation: Fs=5.5, 6 or 6.5MHz
100% modulation=±50kHz FM deviation
—80
—
%
B
FM modulation: NTSC Fs=4.5MHz
100% modulation=±25kHz FM deviation
—80
—
%
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
–2.5
—
+2dB
C
Audio Distortion FM (THD only)
at 1kHz, 100% modulation (
±50kHz)
No video
—0.4
2
%
C
Audio Distortion AM (THD only)
at 1kHz, 100% modulation
No video
—1.5
2.5
%
D
Audio S/N with Sync Buzz FM
Ref 1Khz, 50% modulation (+/-25Khz)
EBU color bars Video signal,
using CCIR 468.2 weighting filter
48
53
—
dB
C
Audio S/N with Sync Buzz AM
Reference 1kHz, 85% modulation
Video input EBU color bar 75%
Audio BW 40Hz—15kHz
Weighting filter CCIR 468-2
45
50
—
dB
D
AudioSignal toNois e
46
48
50
52
54
56
58
471 521 571 621 671 721 771 821 871
Fr e que ncy (M hz )
Typical
Minimum specification
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com


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