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Are VCC and GND voltage ranges absolute for SN74HCT14?

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Intellectual 275 points
Other Parts Discussed in Thread: SN74AHCT14

Are the VCC and GND voltage values absolute or can they be viewed as relative? I have a customer who wants to drive the GND pin on a SN74AHCT14 with -5V and the VCC pin with 0V. The logic input is either -5V (low) or 0V (high).  Is this acceptable?

Thanks,

Ali