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) DESCRIPTION ORDER CODE : TEA6414A 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). August 1992 Input 1 20 Input DATA 2 19 GROUND Input 3 18 Output CLOCK 4 17 Output Input 5 16 Output Input 6 15 Output ENABLE 7 14 Output Input 8 13 Output Vcc 9 12 Not to be connected Input 10 11 Input 6414A-01.EPS PIN CONNECTIONS 1/9 TEA6414A BLOCK DIAGRAM CBS (MAC/DEC) 1 CVBS (PERI PLUG4) 3 CVBS (AM TUNER) 5 MAC SIGNAL (AMTUNER) 6 CVBS (PERI PLUG2) 8 CVBS (FM TUNER) 10 MAC SIGNAL (FM TUNER) 11 SYNCHRO (TTX/BT X) 20 PERI TV1 PERI TV2 TTX 18 17 16 LUMA PIP CHROMA POWER 15 14 MAC DEC. N.C. 13 12 2 DATA 7 4 ENABLE CLOCK 9 19 V CC GND 6414A-02.EPS BUS DECODER ABSOLUTE MAXIMUM RATINGS Parameter Supply Voltage (pin 9) Value Unit 13 TA Operating Ambient Temperature Range Tstg Storage Temperature Range V 0 to +70 o C -20 to +150 o C THERMAL DATA Symbol Rth(j-a) 2/9 Parameter Junction-Ambient Thermal Resistance Value 80 Unit o C/W 6414A-01.TBL VCC 6414A-02.TBL Symbol TEA6414A ELECTRICAL CHARACTERISTICS TA = 25oC , VCC = 10V , RLOAD = 10kΩ , CLOAD = 3pF (unless otherwise specified) Symbol VCC ICC 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 1 3 VPP µA 3.3 3.6 5 3.9 100 V mV 4.5 5.5 25 6.5 10 15 -50 2.7 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) 2 Dynamic Output Impedance Gain Bandwidth (-1dB attenuation) Bandwidth (-3dB attenuation) Crosstalk (f = 5MHz) DC level 5.5 7 2.4 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 50 7.5 3 VPP Ω dB MHz MHz dB V 6414A-03.TBL OUTPUTS (VIN = 1VPP for all dynamic tests) Pins 13-14-15-16-17-18 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 00000 00100 00010 00110 00001 00101 00011 00111 XXX XXX XXX - -XXX XXX XXX - -- Selected Output Pin 18 Pin 14 Pin 16 Not used Pin 17 Pin 13 Pin 15 Not used Output is selected by address bits Selected Input 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-04.TBL 00XXX 00XXX 00XXX 00XXX 00XXX 00XXX 00XXX 00XXX Example : 00100 101 connects pin 10 (input) to pin 14 (output) (equals 25 hex.). 3/9 TEA6414A IN / OUT PIN CONFIGURATION Figure 1 : Input Configuration Figure 2 : Output Configuration VCC VCC 14k Ω x3 All video outputs Pins 13-14-15 16-17-18 0.36 VCC 7k Ω 11k Ω Pins 1-3-5-6 8-10-11-2 0 6 times Figure 3 : Bus I/O Configuration 6414A-04.EPS 6414A-03.EPS 8 NPN transistors Output Figure 4 : VCC Pin Configuration VCC VCC Pin 9 250µA Pins 2-4-7 VREF 2 to I L part 6414A-06.EPS 150 Ω 6414A-05.EPS 20k Ω 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, 4/9 whilst the ENABLE- and CLOCKLINES are driven only by the microprocessor. It is possible to select several ICs from the µP via the THOMSON BUS. TEA6414A IC 1 IC 2 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 µP is also flexible. This bidirectional transmission is possible from the last addressed IC after the posi- IC 3 IC n 6414A-07.EPS µP tive going edge of the ENABLE signal if the ENABLE signal remains high and the CLOCK impulses are present on the line. The µP in effect clocks out the data from the chip. When an IC is able to send information in the bidirectional way, the µP 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 µP, 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 from µP Data to µP ENABLE CLOCK datatransfer 6414A-08.EPS DATA datatransfer 5/9 TEA6414A TIMING DIAGRAMS Data toµP Data fromµP m k g ENABLE c CLOCK h a d j e DATA 2 3 4 5 n-1 n b 1 f 2 3 n o 6414A-09.EPS 1 i Data from µP a ENABLE r CLOCK e c n-1 n 1 f 2 3 4 6414A-10.EPS d DATA 5 b TIMING FOR THOMSON BUS Min. 1 1 1 1 2 1 2 Typ. Max. Unit µs µs µs µs µs µs µs 6414A-05.TBL Parameter a b c d e f r Symbol Parameter High Level Low Level Input Current 6/9 ● ● 0.4V < VIN < 1V VIN > 3.5V Min. 3.5 Typ. Max. -35 -13 0 1 0 2 Unit V V µA 6414A-06.TBL BUS INPUTS (pin 2, 4 and 7) TEA6414A TYPICAL APPLICATION 100kΩ 22µF 220nF 11 MAC 10 CBVS 100kΩ 75Ω 75Ω 100µF 12 9 220nF 13 CVBS OUTPUT 8 CBVS 220nF 10kΩ 14 CVBS OUTPUT 10kΩ 15 CVBS OUTPUT 10kΩ 16 CVBS OUTPUT 10kΩ 17 CVBS OUTPUT VCC 10V 10Ω T E A 6 4 1 4 A 75Ω 7 EN (BUS) 100kΩ 22µF 6 MAC 100kΩ 75Ω 220nF 5 CVBS 75Ω 4 CK (BUS) 10kΩ 220nF 18 CVBS OUTPUT 3 CVBS 75Ω 10kΩ 19 2 20 1 220nF 75Ω CVBS 6414A-11.EPS 220nF CVBS DA (BUS) 75Ω 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). 7/9 TEA6414A OTHER APPLICATION DIAGRAM EXAMPLE BUS DECODER CVBS1 CVBS2 CVBS3 Yext Vcc/2 Vcc Cext Yint Vcc/2 Vcc Cint Y, C ADDER Y, C SEPARATOR 8/9 Yout2 Cout2 CVBSout2 6414A-12.EPS Yout1 Cout1 CVBSout1 Y+C TEA6414A I b1 L a1 PACKAGE MECHANICAL DATA 20 PINS – PLASTIC DIP B b e E Z Z e3 D 11 1 10 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 0.45 0.25 Inches Typ. Max. 0.065 0.018 0.010 25.4 8.5 2.54 22.86 1.000 0.335 0.100 0.900 7.1 3.93 3.3 0.280 0.155 DIP20.TBL Dimensions PM-DIP20.EPS F 20 0.130 1.34 0.053 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. 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. 9/9