Teac TFT IDTV Service Manual
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1022” TFT TV Service Manual 13/10/200411.8. TEA641511.8.1. General descriptionThe main function of the IC is to switch 8 video input sources on 6 outputs. Each output can be switchedon only one of each input. On each input an alignment of the lowest level of the signal is made (bottom ofsynch. top for CVBS or black level for RGB signals). Each nominal gain between any input and output is6.5dB. For D2MAC or Chroma signal the alignment is switched off by forcing, with an external resistorbridge, 5 VDC on the input. Each input can be used as a normal input or as a MAC or Chroma input (withexternal resistor bridge). All the switching possibilities are changed through the BUS. Driving 75Ω loadneeds an external transistor. It is possible to have the same input connected to several outputs. Thestarting configuration upon power on (power supply: 0 to 10V) is undetermined. In this case, 6 words of 16bits are necessary to determine one configuration. In other case, 1 word of 16 bits is necessary todetermine one configuration.11.8.2. 13.5.2.Features• 20MHz Bandwidth• Cascadable with another TEA6415C (Internal address can be changed by pin 7 voltage)• 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 resistorbridge• Bus controlled• 6.5dB gain between any input and output• 55dB crosstalk at 5mHz• Fully ESD protected11.8.3. 13.5.3.Pinning1. Input : Max : 2Vpp, Input Current: 1mA, Max : 3mA2. Data : Low level : -0.3V Max: 1.5V,High level : 3.0V Max : Vcc+0.5V3. Input : Max : 2Vpp, Input Current: 1mA, Max : 3mA4. Clock : Low level : -0.3V Max: 1.5V,High level : 3.0V Max : Vcc+0.5V5. Input : Max : 2Vpp, Input Current: 1mA, Max : 3mA6. Input : Max : 2Vpp, Input Current: 1mA, Max : 3mA7. Prog8. Input : Max : 2Vpp, Input Current: 1mA, Max: 3mA9. Vcc : 12V10. Input : Max : 2Vpp, Input Current: 1mA, Max : 3mA11. Input : Max : 2Vpp, Input Current: 1mA, Max : 3mA12. Ground13. Output : 5.5Vpp, Min : 4.5Vpp14. Output : 5.5Vpp, Min : 4.5Vpp15. Output : 5.5Vpp, Min : 4.5Vpp16. Output : 5.5Vpp, Min : 4.5Vpp17. Output : 5.5Vpp, Min : 4.5Vpp18. Output : 5.5Vpp, Min : 4.5Vpp19. Ground20. Input : Max : 2Vpp, Input Current : 1mA, Max : 3mA |
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