SN74LVC8T245 False trigger when startup

Randy Wang

Other Parts Discussed in Thread: SN74LVC8T245, SN74LVC16245A

Hi Team

My customer is using SN74LVC16425A and SN74LVC8T245, in startup 74LVC8T245 has some chance to trigger the output at startup (no input), below is the schematic and waveform, please help to check why 8T245 has this behavior?

Any difference between SN74LVC16245A and SN74LVC8T245?

over 9 years ago

0 Nirav Patel over 9 years ago

TI__Expert 6335 points

Randy,

Please refer to the E2E post below for your question about the SN74LVC8T245:

Best Regards,
Nirav

0 Randy Wang over 9 years ago in reply to Nirav Patel

TI__Intellectual 1705 points

Hi Nirav
As you see, my input has weak pull down. but the output still has glitch, how to solve this issue? Is that means I must powered up VCCA before VCCB? Then choose the voltage level A or B side and decide the direction? thanks.

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SN74LVC8T245 False trigger when startup