SN74LVC1G34: VCC with 1.8V and 5V Input

manmohan ct

Part Number: SN74LVC1G34

Hi,
We are planning to use SN74LVC1G34 (Single 1.65-V to 5.5-V buffer) in our design.

We are using the IC in such a place where it will be working in down voltage translation.

Please find the working condition mentioned below,

It will be helpful if you can review share your thoughts on this.

Please find the screenshot of schematics below,

0 Clemens Ladisch over 2 years ago

Guru 306790 points

Looks OK.

What is the purpose of the 10 Ω resistor? A source termination resistor should be near the driving device.

0 manmohan ct over 2 years ago in reply to Clemens Ladisch

10E Series termination and near to the connector
Is there any problem in the down conversion from 5.5V to 1.8V?

0 Clemens Ladisch over 2 years ago in reply to manmohan ct

Guru 306790 points

That resistor is not at the source. What is the characteristic impedance of the cable?

The down conversion is OK.

0 manmohan ct over 2 years ago in reply to Clemens Ladisch

it is taken care in placement. The space came in between due to net name which is not in this diagram.

0 Emrys Maier over 2 years ago in reply to manmohan ct

Hello,

Just for some additional information, please see this FAQ regarding the input voltage being greater than the supply voltage: Can the input voltage (Vi) to my logic device be higher than the supply voltage (Vcc)?

0 manmohan ct over 2 years ago in reply to Emrys Maier

Thank you very much

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