TEA6415C データシートの表示（PDF） - STMicroelectronics
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TEA6415C Datasheet PDF : 11 Pages
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TEA6415C
1 General Description
General Description
Figure 1: TEA6415C Block Diagram
Input
Input
Input
Input
Input
Input
Input
Input
Output Output Output Output Output Output
Ground
18 17 16 15 14 13
12
1
3
5
6
8
10
11
20
Bus Decoder
2
Data
7
Prog
4
Clock
9
VCC
19
Ground
The main function of the TEA6415C is to switch 8 video input sources on the 6 outputs.
Each output can be switched to only one of the inputs, whereas any single input may be connected
to several outputs. The lowest level of each signal is aligned on each input (bottom of sync pulse for
CVBS or Black Level for RGB signals).
The nominal gain between any input and output is 6.5 dB. For Chroma signals, the alignment is
switched off by forcing, with an external 5 VDC resistor bridge on the input. Each input can be used
as a normal input or as a Chroma input (with external resistor bridge). All the switching possibilities
are changed through the I²C bus.
Driving a 75 Ω load requires an external transistor.
The switches configuration is defined by words of 16 bits: one word of 16 bits for each output
channel.
So, 6 words of 16 bits are necessary to determine the starting configuration upon power-on (power
supply: 0 to 10V). But a new configuration needs only the words of the changed output channels.
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