参数资料
型号: MC44BC375UEF
厂商: Freescale Semiconductor
文件页数: 18/20页
文件大小: 0K
描述: IC A-VHF MODULATOR 16-SOIC
标准包装: 48
类型: 调制器
应用: 机顶盒
安装类型: 表面贴装
封装/外壳: 16-SOIC(0.154",3.90mm 宽)
供应商设备封装: 16-SOIC N
包装: 管件
Video Characteristics
MC44BC375/U/J/T Technical Data
9 Video Characteristics
10 Audio Characteristics
All audio measurement use specified pre-emphasis circuit.
11 Characterization Measurement Conditions
Device default configuration unless otherwise specified:
Sound subcarrier frequency = 5.5Mhz
Picture-to-sound carrier ratio = 12dB
CH3 & CH4 frequencies
RF Inputs / Output into 75ohm Load using a 75 to 50 ohm transformation.Video Input 1V pk-pk.Audio
pre-emphasis circuit engaged.
Parameter
Test Conditions
Min
Typ
Max
Unit
Type
Video bandwidth
Reference 0dB at 100kHz, measured at
5MHz
-1.5
-0.5
dB
C
Video input level
75Ohm load
1.5Vcvbs
D
Video input current
0.2
1
AA
Video input impedance
500
K
A
Video S/N
Unweighted
Weighted
49
56
52
60
dB
C
Differential Phase
+/-1
+/-5
deg
C
Differential Gain
1
5
%
C
Luma/Sync ratio
Input ratio 7.0:3.0
6.8/ 3.2
7.2/2.8
B
Video modulation depth
Video input level=1.0 Vcbvs
80
85
90
%
B
Peak White Clip
Video Modulation Depth for Video=1.4 Vcbvs
90.5
95
99.5
%
B
Parameter
Test Conditions
Min
Typ
Max
Unit Type
Picture to Sound ratio
PSS (Pin2) = HI
PSS (Pin2) =LO
14
12
16
14
18
16
dB
B
Picture to Sound ratio
difference
between PSS = HI and PSS = LO
1.5
2.0
2.5
dB
B
Audio FM Modulation Depth
Using specific pre-emphasis circuit - Audio Input: 1Khz @ 205 mVrms
Fs = 4.5 MHz
(100% Modulation = +/- 25 kHz FM Deviation)
75
85
95
%
B
Fs = 5.5 MHz
(100% Modulation = +/- 50 kHz FM Deviation)
75
85
95
%
B
Audio input resistance
45
55
61
k
A
Audio Frequency response
0dB ref @1kHz
Measure from 50Hz to 15kHz
-2.5
-
+2
dB
C
AudioDistortionFM (THD
only)
At 1 kHz and 100% mod (+/- 50 kHz) - No Video
-
0.3
1
%
C
Audio S/N with Sync Buzz FM
50
53
-
dB
C
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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