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參數(shù)資料
| 型號： | MC44BC374T1D |
| 廠商： | MOTOROLA INC |
| 元件分類： | 消費(fèi)家電 |
| 英文描述： | PLL Tuned PAL/NTSC UHF and VHF Audio/ Video High Integration Modulator IC |
| 中文描述： | SPECIALTY CONSUMER CIRCUIT, PDSO16 |
| 封裝： | SO-16 |
| 文件頁數(shù)： | 11/24頁 |
| 文件大小： | 635K |
| 代理商： | MC44BC374T1D |
Audio Characteristics
MOTOROLA
MC44BC373/374
Technical Data
For More Information On This Product,
Go to: www.freescale.com
11
10 Audio Characteristics
Unless otherwise stated: V
cc
=5
.
0V, Ambient Temperature=25
o
C, Video Input 1V
p-p
, 10-step
grayscale. RF inputs/outputs into 75Ohm load. SPECIFICATIONS VALID ONLY FOR ENVELOPE
DEMODULATION.
Figure 5. Typical performance—Audio
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
FM modulation: Fs=5
.
5, 6or6
.
5MHz
100% modulation=±50kHz FM deviation
FM modulation: NTSC Fs=4
.
5MHz
100% modulation=±25kHz FM deviation
65
80
95
%
B
65
80
95
%
B
65
80
95
%
B
Audio input resistance
—
45
53
61
K
A
Audio Frequency response
Reference 0dB at 1kHz,
using specified pre-emphasis circuit,
measure from 50Hz to 15kHz.
At 1kHz, 100% modulation (
±
50kHz).
No video.
–
2
.
5
—
+
2
dB
C
Audio Distortion FM (THD only)
—
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
Video input EBU color bar 75%.
Weighting filter CCIR468-2.
48
53
—
dB
C
Audio S/N with Sync Buzz AM
Reference 1kHz, 85% modulation.
Video input EBU color bar 75%.
Audio BW from 40Hz to 15kHz.
Weighting filter CCIR468-2.
45
50
—
dB
D
Audio Signal to Noise
46
48
50
52
54
56
58
471 521 571
621 671 721 771 821 871
Frequency (Mhz)
d
Typical
Minimum specification
F
Freescale Semiconductor, Inc.
n
.
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