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TEA6414A
BUS-CONTROLLED VIDEO MATRIX SWITCH
. . . . . . . .
15MHz BANDWIDTH 8 INPUTS (CVBS, RGB, MAC, chroma...) 6 OUTPUTS POSSIBILITY OF MAC OR CHROMA SIGNAL FOR EACH INPUT BY SWITCHING-OFF THE CLAMP WITH AN EXTERNAL RESISTOR BRIDGE BUS CONTROLLED 6.5dB GAIN BETWEEN ANY INPUT AND OUTPUT - 50dB CROSSTALK AT 5MHz FULLY PROTECTED AGAINST ESD
DIP20 (Plastic Package) ORDER CODE : TEA6414A
DESCRIPTION The main function of the TEA6414A is to switch 8 video input sources on the 6 outputs. Each output can be switched to only one of the inputs whereas any same input may be connected to several outputs. All the switching possibilities are changed through the 3-Wire Bus (THOMSON BUS). PIN CONNECTIONS
Input DATA Input CLOCK Input Input ENABLE Input Vcc Input
1 2 3 4 5 6 7 8 9 10
20 19 18 17 16 15 14 13 12 11
Input GROUND Output Output Output Output Output Output Not to be connected Input
6414A-01.EPS
August 1992
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TEA6414A
BLOCK DIAGRAM
PERI TV1 PERI TV2 TTX LUMA PIP CHROMA POWER MAC DEC. N.C.
18 CBS (MAC/DEC) CVBS (PERI PLUG4) CVBS (AM TUNER) MAC SIGNAL (AMTUNER) CVBS (PERI PLUG2) CVBS (FM TUNER) MAC SIGNAL (FM TUNER) SYNCHRO (TTX/BT X)
17
16
15
14
13
12
1
3
5
6
8
10
11
20
BUS DECODER
2 DATA
7
4
9 V CC
19 GND
ENABLE CLOCK
ABSOLUTE MAXIMUM RATINGS
Symbol VCC TA Tstg Supply Voltage (pin 9) Operating Ambient Temperature Range Storage Temperature Range Parameter Value 13 0 to +70 -20 to +150 Unit
o o
C C
Symbol Rth(j-a)
Parameter Junction-Ambient Thermal Resistance
Value 80
Unit
o
C/W
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6414A-02.TBL
THERMAL DATA
6414A-01.TBL
V
6414A-02.EPS
TEA6414A
ELECTRICAL CHARACTERISTICS TA = 25oC , VCC = 10V , RLOAD = 10k , CLOAD = 3pF (unless otherwise specified)
Symbol VCC ICC INPUTS 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) 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 7 5.5 25 6.5 10 15 -50 2.7 50 7.5 VPP dB MHz MHz dB V 2 1 3.3 3.6 5 3 3.9 100 VPP A V mV Parameter Supply Voltage (pin 9) Power Supply Current (without load on outputs ; VCC=10V) Min. 7 20 Typ. 10 30 Max. 11 40 Unit V mA
2.4
3
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 alignment 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 BUS SELECTIONS (THOMSON BUS)
ADDRESS MSB 00000 00100 00010 00110 00001 00101 00011 00111 DATA LSB XXX XXX XXX - -XXX XXX XXX - --
MAC or Chroma input (with external resistor bridge). All the switching possibilities are changed through the BUS. Driving 75 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.
Selected Output Pin 18 Pin 14 Pin 16 Not used Pin 17 Pin 13 Pin 15 Not used Selected Input
Output is selected by address bits
Example : 00100 101 connects pin 10 (input) to pin 14 (output) (equals 25 hex.).
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6414A-04.TBL
00XXX 00XXX 00XXX 00XXX 00XXX 00XXX 00XXX 00XXX
000 100 010 110 001 101 011 111
Pin 5 Pin 8 Pin 3 Pin 20 Pin 6 Pin 10 Pin 1 Pin 11
Input is selected by data bits
6414A-03.TBL
TEA6414A
IN / OUT PIN CONFIGURATION Figure 1 : Input Configuration Figure 2 : Output Configuration
VCC
VCC
14k x3 All video outputs Pins 13-14-15 16-17-18
0.36 VCC
7k
Pins 1-3-5-6 8-10-11-2 0
6414A-03.EPS
11k 8 NPN transistors
6 times
6414A-04.EPS
Output
Figure 3 : Bus I/O Configuration
VCC
Figure 4 : VCC Pin Configuration
VCC Pin 9
250A
Pins 2-4-7
VREF
to I L part
2
20k
6414A-05.EPS
150
6414A-06.EPS
SPECIFICATION FOR THE THOMSON BIDIRECTIONAL DATA BUS The bidirectional data bus has three lines (DATA, CLOCK, ENABLE) and operates serially. Transmission on the DATALINE is effected bidirectionally, whilst the ENABLE- and CLOCKLINES are driven only by the microprocessor. It is possible to select several ICs from the P via the THOMSON BUS.
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TEA6414A
The identification or address of each particular IC is achieved by the length of the word (number of clock pulses), and each IC responds with its own particular word length. The address length is determined only while ENABLE is low, by counting the clock pulses. The rising edge of the ENABLE signal indicates the end of the address sequence. Normally, there are several locations within the same chip, which must be selected individually, the datastream may, therefore be split into subaddress and data. In the case where an IC is not using the complete specified subaddress range it is possible to employ the unused subaddress range with a second or third IC with the same word length. The bitnumber of the subaddress is flexible. The reply word length from any of the ICs to the P is also flexible. This bidirectional transmission is possible from the last addressed IC after the posiData fromP ENABLE
tive going edge of the ENABLE signal if the ENABLE signal remains high and the CLOCK impulses are present on the line. The P in effect clocks out the data from the chip. When an IC is able to send information in the bidirectional way, the P decides whether to take all information, to suppress completely the information or to stop the transfer after any bit. This reply word, synchronized to the clock from P, is sent only once. Should a subsequent clock impulse be present on the clock line, it will switch the IC in question to high impedance. The register, from which the bidirectional information comes, is addressed with the IC address. When more than one bidirectional register exists, the selection is made by the previously selected subaddress.
Data to P
CLOCK
DATA
6414A-08.EPS
datatransfer
datatransfer
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6414A-07.EPS
P
IC 1
IC 2
IC 3
IC n
TEA6414A
TIMING DIAGRAMS
Data fromP m g ENABLE k Data toP
CLOCK
c
h
a DATA 1 b 2 3
d
e
j
4
5
n-1
n f o
1
2
3
n i
6414A-09.EPS 6414A-06.TBL
Data from P ENABLE r CLOCK e c a
DATA n-1 n f b 1 2 3
d 4 5
6414A-10.EPS
TIMING FOR THOMSON BUS
Parameter a b c d e f r Min. 1 1 1 1 2 1 2 Typ. Max. Unit s s s s s s s
BUS INPUTS (pin 2, 4 and 7)
Symbol High Level Low Level Input Current Parameter Min. 3.5 -35 Typ. Max. 1 0 2 Unit V V A
q q
0.4V < VIN < 1V VIN > 3.5V
-13 0
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6414A-05.TBL
TEA6414A
TYPICAL APPLICATION
100k
22F
220nF
MAC 75 100k
11
10
75
100F
CBVS
12
9 220nF
10
VCC 10V
CVBS OUTPUT 10k
13
8 220nF 75
CBVS
CVBS OUTPUT 10k
14
CVBS OUTPUT 10k
15
CVBS OUTPUT 10k
16
CVBS OUTPUT 10k
17
T E A 6 4 1 4 A
7
EN (BUS)
100k 6 100k
22F
MAC 75 220nF
5 75
CVBS
4
CK (BUS)
220nF CVBS OUTPUT 10k 18 3 75 CVBS
19
2
DA (BUS)
220nF CVBS 20 1
220nF CVBS 75
6414A-11.EPS
75
CROSSTALK IMPROVEMENT 1 - When any input is not used, it must be bypassed to ground through a 220nF capacitor. 2 - An important improvement can be achieved considering the input crosstalk by means of the application (refer to technical note).
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TEA6414A
OTHER APPLICATION DIAGRAM EXAMPLE
BUS DECODER
CVBS1
CVBS2
CVBS3
Yext Vcc
Cext
Yint
Vcc
Cint
Y+C
Vcc/2
Vcc/2
Yout1 Cout1
CVBSout1
Yout2 Cout2
CVBSout2
Y, C ADDER
Y, C SEPARATOR
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6414A-12.EPS
TEA6414A
PACKAGE MECHANICAL DATA 20 PINS - PLASTIC DIP
a1
I
b1
b Z e3
B
e Z
L
E
D
20
11
F
1
10
Dimensions a1 B b b1 D E e e3 F i L Z Min. 0.254 1.39
Millimeters Typ.
Max. 1.65
Min. 0.010 0.055
Inches Typ.
Max. 0.065
0.45 0.25 25.4 8.5 2.54 22.86 7.1 3.93 3.3 1.34
0.018 0.010 1.000 0.335 0.100 0.900 0.280 0.155 0.130 0.053
DIP20.TBL
Information furnished is believed to be accurate and reliable. However, SGS-THOMSON Microelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No licence is granted by implication or otherwise under any patent or patent rights of SGS-THOMSON Microelectronics. Specifications mentioned in this publication are subject to change without noti ce. This publication supersedes and replaces all information previously supplied. SGS-THOMSON Microelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of SGS-THOMSON Microelectronics. (c) 1994 SGS-THOMSON Microelectronics - All Rights Reserved Purchase of I2C Components of SGS-THOMSON Microelectronics, conveys a license under the Philips I2C Patent. Rights to use these components in a I2C system, is granted provided that the system conforms to the I2C Standard Specifications as defined by Philips. SGS-THOMSON Microelectronics GROUP OF COMPANIES Australia - Brazil - China - France - Germany - Hong Kong - Italy - Japan - Korea - Malaysia - Malta - Morocco The Netherlands - Singapore - Spain - Sweden - Switzerland - Taiwan - Thailand - United Kingdom - U.S.A.
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PM-DIP20.EPS

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