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| 型號(hào)： | MC44BC374EJBR2 |
| 廠商： | Freescale Semiconductor |
| 文件頁(yè)數(shù)： | 3/24頁(yè) |
| 文件大小： | 0K |
| 描述： | IC MODULATOR ANT BOOSTER 24TSSOP |
| 標(biāo)準(zhǔn)包裝： | 2,500 |
| 類(lèi)型： | 調(diào)制器 |
| 應(yīng)用： | 機(jī)頂盒 |
| 安裝類(lèi)型： | 表面貼裝 |
| 封裝/外殼： | 24-TSSOP（0.173"，4.40mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 24-TSSOP |
| 包裝： | 帶卷 (TR) |
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Audio Characteristics
MC44BC373/374 Technical Data
10 Audio Characteristics
Unless otherwise stated: Vcc=5.0V, Ambient Temperature=25
o C, Video Input 1V
p-p, 10-step
grayscale. RF inputs /outputs into 75 Ohm 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
65
80
95
%
B
FM modulation: Fs=5.5, 6 or 6.5MHz
100% modulation=±50kHz FM deviation
65
80
95
%
B
FM modulation: NTSC Fs=4.5MHz
100% modulation=±25kHz FM deviation
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.
–2.5
—
+2dB
C
Audio Distortion FM (THD only)
At 1kHz, 100% modulation (
±50kHz).
No video.
—
0.42
%
C
Audio Distortion AM ( THD only)
At 1kHz, 100% modulation.
No video.
—
1.52.5%
D
Audio S/N with Sync Buzz FM
Video input EBU color bar 75%.
Weighting filter CCIR 468-2.
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 CCIR 468-2.
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)
dB
Typical
Minimum specification
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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