TEA6414A Просмотр технического описания (PDF) - STMicroelectronics
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TEA6414A Datasheet PDF : 9 Pages
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TEA6414A
ELECTRICAL CHARACTERISTICS
TA = 25oC , VCC = 10V , RLOAD = 10kΩ , CLOAD = 3pF (unless otherwise specified)
Symbol
VCC
ICC
INPUTS
Parameter
Supply Voltage (pin 9)
Power Supply Current (without load on outputs ; VCC=10V)
Min.
7
20
Typ.
10
30
Maximum Signal Amplitude (CVBS signal)
Input Current (per output connected, input voltage = 5VDC) (this
current is X6 when all outputs are connected on the input)
DC Level
DC Level Shift (temperature from 0 to 70oC)
2
1
3.3
3.6
5
OUTPUTS (VIN = 1VPP for all dynamic tests) Pins 13-14-15-16-17-18
Dynamic
Output Impedance
Gain
Bandwidth (-1dB attenuation)
Bandwidth (-3dB attenuation)
Crosstalk (f = 5MHz)
DC level
4.5
5.5
25
5.5
6.5
7
10
15
-50
2.4
2.7
Max.
11
40
3
3.9
100
50
7.5
3
Unit
V
mA
VPP
µA
V
mV
VPP
Ω
dB
MHz
MHz
dB
V
GENERAL DESCRIPTION
The main function of the IC is to switch 8 video input
sources on 6 outputs.
Each output can be switched on only one of each
input. On each input an alignment of the lowest
level of the signal is made (bottom of synch. top for
CVBS or black level for RGB signals).
Each nominal gain between any input and output
is 6.5dB. For D2MAC or Chroma signal the align-
ment is switched off by forcing, with an external
resistor bridge, 5 VDC on the input.
Each input can be used as a normal input or as a
MAC or Chroma input (with external resistor
bridge).
All the switching possibilities are changed through
the BUS.
Driving 75Ω load needs an external transistor.
It is possible to have the same input connected to
several outputs.
The starting configuration (power supply from 0 to
10V) is undetermined. In this case, 6 words of 8 bits
are necessary to determine one configuration. In
other case, one word of 8 bits is necessary to
determine one configuration.
BUS SELECTIONS (THOMSON BUS)
ADDRESS
MSB
DATA
LSB
Selected Output
00000
00100
00010
00110
00001
00101
00011
00111
XXX
XXX
XXX
- --
XXX
XXX
XXX
- --
Pin 18
Pin 14
Pin 16
Not used
Pin 17
Pin 13
Pin 15
Not used
Selected Input
00XXX
00XXX
00XXX
00XXX
00XXX
00XXX
00XXX
00XXX
000
Pin 5
100
Pin 8
010
Pin 3
110
Pin 20
001
Pin 6
101
Pin 10
011
Pin 1
111
Pin 11
Output is selected by
address bits
Input is selected by
data bits
Example : 00100 101 connects pin 10 (input) to pin 14 (output) (equals 25 hex.).
3/9
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