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PDF TEA6425 Datasheet ( Hoja de datos )

Número de pieza TEA6425
Descripción VIDEO CELLULAR MATRIX
Fabricantes ST Microelectronics 
Logotipo ST Microelectronics Logotipo

Total 9 Páginas
		
TEA6425 Hoja de datos, Descripción, Manual
. 6 VIDEO INPUTS - 8 VIDEO OUTPUTS
. 2 INTERNAL SELECTABLE YC ADDERS
. 15MHz BANDWIDTH @ -3dB
. SELECTABLE 0.5/6.5dB GAIN FOR EACH
OUTPUT
. HIGH IMPEDANCE SWITCH FOR EACH
OUTPUT (3-state operation)
. PROGRAMMABLE CLAMP MODE ON EACH
INPUT (sync bottom or average value)
. -60dB CROSSTALK @ 5MHz
. 4 SUB-ADDRESS CAPABILITY
. I2C BUS CONTROL
TEA6425
VIDEO CELLULAR MATRIX
DIP20
(Plastic Package)
ORDER CODE : TEA6425
DESCRIPTION
This device is intended for switching between video
and chroma signals such as CVBS, SVHS, base-
band CVBS, MAC. Each input clamp mode, each
output gain, all switching are controlled through the
I2C bus. The 8 outputscan be set separatelyin high
impedance state, to enable parallel DC connection
of several devices (up to 4).
PIN CONNECTIONS
SO20L
(Plastic Micropackage)
ORDER CODE : TEA6425D
IN 1
SDA
IN 2
SCL
IN 3
IN 4
SUB
IN 5
VCCP
IN 6
1
2
3
4
5
6
7
8
9
10
20 VCC
19 OUT 1
18 OUT 2
17 OUT 3
16 OUT 4
15 OUT 5
14 OUT 6
13 OUT 7
12 OUT 8
11 GND
May 1996
1/9

1 page

TEA6425 pdf
TEA6425
I2C BUS SELECTION
I2C Bus Slave Address
Address
A6
A5
A4
A3
A2
A1
A0 R/W
Value
1
0
0
1
0 A1 A0 0
Sub-address I2C
Symbol
Parameter
Conditions
Pin 7 Voltage (typ.)
Vsub
Slave address HEXA
Sub-address
(see note)
A1 A0
1
90
00
GND
2
96
11
VCC
3 94 1 0 1/3
4 92 0 1 2/3
Note : The first 3 levels are defined by connecting the sub-address pin to the appropriate level. Sub-address 4 will be selected
when this pin is left open.
Unit
V
V
VCC
VCC
1st Data Byte
b7 b6 b5 b4 b3 b2 b1 b0
a2 a1 a0
*
*
*
*
I
000* * * *0
Output
Select
001* * * *0
010* * * *0
011* * * *0
100* * * *0
101* * * *0
110* * * *0
111* * * *0
Selected
Output
OUT1
OUT2
OUT3
OUT4
OUT5
OUT6
OUT7
OUT8
2nd Data Byte
Input
Select
Clamp
Gain
Mixer
Tri-state
b7 b6 b5 b4 b3 b2
a2 a1 a0
*
*
*
000* * *
001* * *
010* * *
011* * *
100* * *
101* * *
* **0**
* **1**
* ***0*
* ***1*
* *** *0
* *** *1
******
******
Power On Reset
When active : outputs in 3-state, inputs are clamped.
Symbol
Reset Start of Reset
Parameter
End of Reset
Conditions
Incr. VCC
Decr. VCC
Incr. VCC
b1
*
*
*
*
*
*
*
*
*
*
*
*
*
0
1
Min.
4.5
b0 Action
I
1 IN1
1 IN2
1 IN3
1 IN4
1 IN5
1 IN6
1 Free
1 Clamped
1 0.5dB
1 6.5dB
1 Disabled
1 Enabled
1 Low impedance
1 Tri-state
Typ.
Max.
2.5
4.2
Unit
V
V
V
5/9

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