SN74AVC16244: Buffer + Level Shift configuration

Sam Ting

Part Number: SN74AVC16244
Other Parts Discussed in Thread: SN74AUC16244

Hi team,

Could you help confirm if this design is feasible? thanks!

The current SOC I/O is 3.3V and needs to be provided to two devices,
LCD I/O is 1.8V, and the other I/O is 3.3V (as shown in the figure below)
If we use SN74AVC16244 with VCC = 1.8V and 3.3V I/O input, will we get 1.8V logic output?

Best regards,
Sam Ting

over 4 years ago

0 Clemens Ladisch over 4 years ago

Guru 282680 points

Yes; a buffer with overvoltage-tolerant inputs can be used for shifting voltage down like this.

(The first buffer could be replaced with the faster and cheaper SN74AUC16244. There are many possible alternatives for the second buffer, depending on the required speed.)

Because of the holidays, TI E2E™ design support forum responses will be delayed from Dec. 25 through Jan. 2. Thank you for your patience.

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SN74AVC16244: Buffer + Level Shift configuration