• LMC555: LMC555CMMX/NOPB

  

  Balabhaskar V G

  TI Thinks Resolved

  Part Number: LMC555 Other Parts Discussed in Thread: NE555 , TLC555 Hi, In LMC555CMMX/NOPB datasheet for achieving 50% duty cycle discharge pin is kept as high and control pin is left open. Any specific reason for doing the same? And in the same circuit…

  • 7 months ago
  • Clock & timing
  • Clock & timing forum

• LMC555型:duty50% operation

  

  nakamura.hiroaki

  Part Number: LMC555 LMC555の50%デューティ回路構成で発振周波数を2kHz設計しましたが、評価では周波数は1.792kHz、デューティは57%でした。デューティが50%に達しないのは、OUTPUT端子のHigh電圧がV+電圧まで上がっていないからだと思いますが、なぜOUTPUT端子の電圧が11V程度までしか上がらないのでしょうか?V+端子に印加される電圧は12Vで、OUTPUT端子には回路図以外の負荷は接続されていません。回路図と波形を添付しておりますので、ご対応ください…

  • 8 months ago
  • Clock & timing
  • Clock & timing forum

• LMC555: Regarding 300kHz ,Duty50%

  

  Kotaro Suzuki

  Part Number: LMC555 I want to operate at "300kHz Duty50%" . What are the recommended values of Ra, Rb, and C? Regards Suzuki

  • 8 months ago
  • Clock & timing
  • Clock & timing forum
Answered

• Is LMC555 decoupling electrolytic capacitor still required?

  

  Sergej Dziuba

  Resolved

  Hi! We are using LMC555CMMX/NOPB in our schematics. 1.Please explain me, why do we need 1uF electrolytic capacitor if I can use ceramic capacitor instead electrolytic? 2. Using 0.1uF + buck capacitor(like C > 1uF ) in parallel is not actual if both capacitors…

  • Resolved

  • 12 months ago
  • Clock & timing
  • Clock & timing forum

• LMC555: Delayed reset circuit timing difference from simulation

  

  Jonathan Fisher

  Part Number: LMC555 Other Parts Discussed in Thread: TLC555 Hello, I'm having trouble with my LMC555 timer not performing the way I expect. My simulation in PSpice for TI gives the results I expect, but on the board I see something similar but with different…

  • over 1 year ago
  • Clock & timing
  • Clock & timing forum
Answered

• LMC555: IC with National Logo Available?

  

  Ambroise Suter

  Resolved

  Part Number: LMC555 Hello, We are wondering if the LMC555CM/NOPB is still available with National Semiconductor logo or only with the TI logo? Thank you and best regards, Ambroise

  • Resolved

  • over 1 year ago
  • Clock & timing
  • Clock & timing forum

• LMC555: What is the main cause of VCTRL and VTRIG voltage variation?

  

  Kazuya Nakai59

  TI Thinks Resolved

  Part Number: LMC555 Hello guys, One of my customers is considering using LMC555 for their new products. At this moment, they have the following question. Could you please give me your reply? Q. VCTRL and VTRIG voltage have about +/-10% variation. I think…

  • over 1 year ago
  • Clock & timing
  • Clock & timing forum

• LMC555: EVM board availability/ similar type

  

  Gopi Pradeep Reddy Sangala

  TI Thinks Resolved

  Part Number: LMC555 Hi Team, I would like to know do we have any evaluation board for this device or similar type. I am TI employee, you can send an email response for this question at a0225189@ti.com. Regards, Gopi

  • over 1 year ago
  • Clock & timing
  • Clock & timing forum

• LMC555: Out drive current vs Vsupply

  

  Richard Micheel

  TI Thinks Resolved

  Part Number: LMC555 What is the output drive current (sink/source) for the LMC555CTPX over the voltage range? Spec is only given for 15V in the datasheet. Particularly interested in capabilities at 3V4

  • over 1 year ago
  • Clock & timing
  • Clock & timing forum

• LMC555: LMC555 at VS = 3.3V

  

  King Tsai

  TI Thinks Resolved

  Part Number: LMC555 Hello, Team may i know the "Vil", and "Vih" at Vs = 3.3V condition? it didn`t show on datasheet.

  • over 2 years ago
  • Clock & timing
  • Clock & timing forum

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