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SN74F373: Unexpected behavior of output

Part Number: SN74F373
Other Parts Discussed in Thread: SN74ACT373

Dear Technical Support Team,

Our customer replaced 74F373(Fairchaild) with SN74F37(TI). SN74F373 causes  unexpected behavior.

On the other hand, SN74ACT373 behaves correctly.

See attached file.SN74F373.pdf

■Questions

①Do you know the reason why SN74F373 causes unexpected behavior?

②Why does SN74ACT373 operate correctrly?

■Additional information

Vcc has 0.1uF as bypass capacitor.

Best Regards,

ttd