SN74LVC2G07: Need Confirmation Request of application circuit

Satheeshkumar Selvaraj

Part Number: SN74LVC2G07

Dear Specialists,

We are planning to use SN74LVC3G34DCUR(U1) and SN74LVC2G07DCKR(U2) as below configuration. We need your confirmation/suggestion.

The Buffer U1 (SN74LVC3G34DCUR) Power supply is 3.3V and the output is connected to another U2 buffer (SN74LVC2G07DCKR) which is 1.8V power supply & output is pull up to 1.8V.

1.Is it okay to connect 3.3V output signal of (U1) to input pin of 1.8V power supply (U2) buffer.
Note: In datasheet input range is mentioned 0V to 5.5V.

2..Are we need to change the U2(SN74LVC2G07DCKR) Power supply 1.8V to 3.3V .

Could you please see the below configuration block diagram.

Please provide your feedback.

Thanks,

S.Satheesh

over 3 years ago

0 Sebastian Muriel over 3 years ago

TI__Genius 17990 points

Hi Satheesh,

Satheeshkumar Selvaraj said:
1.Is it okay to connect 3.3V output signal of (U1) to input pin of 1.8V power supply (U2) buffer.
Note: In datasheet input range is mentioned 0V to 5.5V.

Yes this is okay, you can input up to 5.5V at the input regardless of VCC for these devices.

Please see this [FAQ] Can the input voltage (Vi) to my logic device be higher than the supply voltage (Vcc)? for further details.

Satheeshkumar Selvaraj said:
2..Are we need to change the U2(SN74LVC2G07DCKR) Power supply 1.8V to 3.3V .

You can use the 1.8V power supply.

Regards,

Sebastian

0 Satheeshkumar Selvaraj over 3 years ago in reply to Sebastian Muriel

Prodigy 95 points

Hi Sebastian,

Thanks for your confirmation.

Thanks,

S.Satheesh

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SN74LVC2G07: Need Confirmation Request of application circuit