SN74CBTD3861: The description of this device

Aaron Chen (FAE)

Intellectual 1310 points

Part Number: SN74CBTD3861

Hi Expert,

Regarding the Datasheet, I wonder know if there is any misunderstanding of my perspective.

When the input voltage A1=5V, OE' is low, VCC= 5V, then the output will be 3.3V?

I know it will be slight different by current &temperature, but it's around 3.3V.

Am I making sense?

Otherwise, what is the meaning of below table "A port=B port"?

Is that mean the voltage totally equivalent?

BR,

Aaron Chen

over 3 years ago

+1 Nir Gilgur over 3 years ago

TI__Mastermind 20675 points

Hello Aaron,

Yes, you are correct. As shown below:

The device is active low, so as you mentioned when OE is low the input port Ax of 5V will connect to the output port Bx and level shift the voltage to 3.3V.

I hope this answers your question!

Best,

Nir

+1 Clemens Ladisch over 3 years ago

Guru 318700 points

For digital signals, the state (high/low) will be the same, even if the high-level voltage is not.

(For analog signals below about 3.3 V, the voltages will be the same.)

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SN74CBTD3861: The description of this device