Texas Instruments THS7374EVM Evaluation Module THS7374EVM THS7374EVM 数据表
产品代码
THS7374EVM
TV CVBS/
Sync Out
75 W
R'
R
VideoSOC/DAC
G'
R1
B'
R1
CVBS/Sync
R1
1
2
3
4
5
6
7
14
13
12
11
10
9
8
CH1 OUT
CH2 OUT
CH3 OUT
CH4 OUT
V
S+
BYPASS
NC
CH1 IN
CH2 IN
CH3 IN
CH4 IN
GND
DISABLE
NC
THS7374
To GPIO Controller
or GND
Left
R2
TV R' Out
75 W
TV G' Out
75 W
TV B' Out
75 W
+3 V to +5 V
Audio
Right
SOC
PCM17xx
R2
Amp
LPF Bias
Amp
LPF Bias
NE5532
DRV600
DRV601
A
B
C
B
C
INH
VEE
VSS
VSS
+12 V
+12 V
100 W
+V
BIAS
47 F
m
100 W
47 F
m
100 kW
100 kW
+
330 F
m
(1)
VCR CVBS/
Sync Out
75 W
+
330 F
m
(1)
+
330 F
m
(1)
+
330 F
m
(1)
+
330 F
m
(1)
20
18
16
14
12
10
8
6
4
2
19
17
15
13
11
9
7
5
3
1
Audio Left Out
470 W
47 F
m
Audio Right Out
470 W
47 F
m
Audio Left Out
470 W
47 F
m
0.1 F
m
Audio Right Out
470 W
47 F
m
NC
NC
NC
NC
NC
NC
NC
NC
75 W
1 kW
470 W
1 kW
Fast Blank
RGB/CVBS
(From GPIO)
RGB/CVBS
(From GPIO)
TV SCART
10 kW
1.5 kW
1.5 kW
STBY/TV
(From GPIO)
(From GPIO)
16:9/4:3
(From GPIO)
(From GPIO)
21
20
18
16
14
12
10
8
6
4
2
19
17
15
13
11
9
7
5
3
1
NC
NC
NC
220 W
VCR SCART
75 W
VCR CVBS In
VCR Mode
22 kW
22 kW
22 kW
21
CD4053
SLOS590B – JULY 2008 – REVISED JANUARY 2011
www.ti.com
Low-Cost SCART System
of this switch is acceptable in this configuration,
because the input impedance of the THS7374 is 800
because the input impedance of the THS7374 is 800
The THS7374 is an ideal device for use in low-cost
k
Ω
and the audio signal impedance requirement is
SCART systems. SCART is used primarily throughout
less than 1 k
Ω
. Obviously, other switches and
Europe and requires four video channels to support
methods could be used, but this alternative is very
the RGB and timing channel. The timing channel is
low cost compared to fairly expensive SCART
also utilized for CVBS signals for systems that do not
switching ICs. It does not support all possible modes
have separate RGB video signals. The connector
and configurations, but it is a good fit to meet many
also
adds
audio
and
several
other
functions.
system requirements.
shows a low-cost application that allows for
a commonly-used SCART switching interface with a
simple CD4053 switch. The relatively high impedance
simple CD4053 switch. The relatively high impedance
(1) These capacitors are optional.
Figure 63. Low-Cost SCART Switching System Circuit
26
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