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參數(shù)資料
| 型號： | MC44355DW |
| 廠商： | MOTOROLA INC |
| 元件分類： | 消費家電 |
| 英文描述： | MULTI.STANDARD AND PAL/NTSC MODULATOR ICs |
| 中文描述： | SPECIALTY CONSUMER CIRCUIT, PDSO20 |
| 封裝： | PLASTIC, SO-20 |
| 文件頁數(shù)： | 14/20頁 |
| 文件大小： | 438K |
| 代理商： | MC44355DW |
MC44353 MC44354 MC44355
14
MOTOROLA ANALOG IC DEVICE DATA
Figure 18. Typical Application
R10
240 k
20
19
18
17
16
15
14
13
12
11
1
2
3
4
5
6
7
8
9
10
Amp In
Xtal
Op Out
SDA
VCCD
SCL
Gnd
Mod Gnd
Osc1
VCC Mod
Osc2
RF Out
Gnd
Mod Gnd
Snd Filt
Video
Snd Tun
VCCA
Pre–Em
Audio
MC44353
C22
0.1
C21
330 pF
R11
560 k
C19
0.0047
R6
33 k
C13 0.022
R5
220 k
C12
0.0022R4
100 k
HVUR17
HVUR17
L2
≈
27
μ
H
R8
47 k
C10
0.1
C16
0.001 (Note 2)
C17
0.001 (Note 2)
R9
47 k
D3
HVU202A
C18
0.1
R7
220 k
C9
220 pF
C8
100 pF
L1
6.8 nH
(Note 3)
30 V
VCCT
Cx
(Note 1)
4.0 MHz
SDA
SCL
High
Speed
Bus
C1, 2
0.2
75
±
1%
C3
0.01
C5
0.001
C6
0.1
5.0 V
TV Out
Video In
Audio In
NOTES:
1.Cx depends on Crystal Load Capacitance, Crystal resistance < 200
.
2.Tubular 0603 1.0 nF capacitors.
3.L1 is a 2 turn air coil.
4.L2 and R3 are non–surface mount components. Note L2 quality factor should be high enough to keep the
sound carrier at the typical level Q min @ 5.5 MHz = 43, Q min @ 6.0 MHz = 40, and Q min @ 6.5 MHz = 37.
5.C11 and L2 are selected to control the sound carrier center frequency and its tuning range.
6.D1 and D2 are hyper–abrupt varactor. Minimum capacitance ratio between 1.0 and 4.5 V is C1/C4.5 = 5.6
to cover the full frequncy range. (C @ 1.0 V = 50 pF min)
C4
0.1
R1
1.0 k
C20
0.01
C14, 15
0.22
C11
C7
10
μ
f
R2
R3
4.7
(Note 4)
(Note 5)
(Note 4)
D1
D2
Modifications to the application layout (Figures 19 through
21) will have an effect on the overall application
performances. The most sensitive areas are around the UHF
Oscillator and RF Output (Pins 4 to 7 and Pins 14 to 17) so
care must be taken to reproduce a similar PCB layout in the
final application.
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