SN74LVC2T45: SN74LVC2T45 negative voltage in GND and 0 voltage in VIN application

Shuang Feng76

Expert 3030 points

Part Number: SN74LVC2T45

could SN74LVC2T45 support below application.

datasheet does not show VCC could be 0. so can this application realize?

if not, what kind of our device could realize below application.

over 3 years ago

0 Clemens Ladisch over 3 years ago

Guru 245210 points

All voltages are measured relative to the GND pin. So in this circuit, as far as the chip is concerned, GND is at 0 V, and V_CCA/V_CCB/DIR are at 5 V.

This is perfectly fine, as long as the input signals are always between these two power rails.

0 Shuang Feng76 over 3 years ago in reply to Clemens Ladisch

TI__Expert 3030 points

So, could you give me a confirmation. about the application in the picture.

Vin 0V. gnd -5v. it can not work. is not it?

0 Dylan Hubbard over 3 years ago in reply to Shuang Feng76

TI__Mastermind 42720 points

Hey Shuang,

As Clemens stated, this is perfectly fine. However, your operation won't be bound by datasheet specs as you mentioned.

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SN74LVC2T45: SN74LVC2T45 negative voltage in GND and 0 voltage in VIN application