SN74HCT14: 3.3V to 5V Level Shifting

Kazuki Itoh

Genius 10045 points

Part Number: SN74HCT14
Other Parts Discussed in Thread: SN74AHCT367

Hello team,

Can SN74HCT14 (VCC=5V) accept 3.3V amplitude signal?

Initial configuration idea is below:

SN74LV14APWR(VCC=3.3V)→SN74HCT14PWR(VCC=5V)

Looking at datasheet, it should be OK. I just want to make sure.

Regards,

Itoh

0 Clemens Ladisch over 4 years ago

Guru 286990 points

Yes, all devices with TTL-compatible inputs (HCT/AHCT/ACT/LV-AT) can be used for 3.3 V to 5 V level shifting.

Why using two inverters? A single non-inverting buffer like the SN74AHCT367 would work as well.

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