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SN74HC245: SN74HC245

Part Number: SN74HC245

There are 2 problems with using 74HC245:

1. When a channel of 74HCT245 starts to work normally, the low level of the OUTPUT end of the power generation is raised by 1V during use, the high level is normal, and the signal of other channels is normal, the specific waveform is shown below;

2, the chip surface is burned, want to know what are the reasons for this situation?

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