LM555: LM555 schematic review

daniel

Genius 5095 points

Part Number: LM555
Other Parts Discussed in Thread: NE555

Hi team,

Could you please help to review the schematic of LM555?

Thanks

over 8 years ago

0 Ron Michallick over 8 years ago

TI__Guru**** 167286 points

Daniel,

The only thing I noticed was the T_RESET formula that doesn't match the LM555 formula for monostable.
LM555 one shot time is 1.1*R*C
LN(2) is the time from 1/3 to 2/3 charge. For one shot the capacitor goes from 0V to 2/3 VCC (just over one time constant)

0 daniel over 8 years ago in reply to Ron Michallick

Genius 5095 points

Dear Ron,

Thanks. It should be NE555.
I re-post on NE555 catalog again.

Thanks

Clock & timing

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LM555: LM555 schematic review