TDA8540 pin function voltage and circuit diagram
The TDA8540S is a video matrix switch with 4 inputs and 4 outputs. There are 16 input and output combinations, each of which can be switched to each output terminal.
| Foot number | Function Description | Foot number | Function Description |
| 1 | Second video output | 11 | Secondary address output pin |
| 2 | Zero control output | 12 | Third video input |
| 3 | Third video output | 13 | Power supply +8V |
| 4 | Driver supply voltage | 14 | First video output |
| 5 | Secondary address output 2 | 15 | Drive supply voltage |
| 6 | Zero video input | 16 | Video output 0 |
| 7 | Secondary address output 1 | 17 | Control output 1 |
| 8 | First video input | 18 | I2C bus clock line |
| 9 | Analogue | 19 | I2C bus data line |
| 10 | Second video input | 20 | digital |
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