Part Number: LMC555 Hello, I'm utilizing the LMC555 timer to produce PWM with a duty cycle between 45-55% and a frequency of 84.5KHz. The timer is set up in A-stable mode, and I'm facing challenges in understanding two key aspects. Firstly, I have…
Hey Ning,
We don't have a spice model for the LMC555 so I used the TLC555 to check the general functionality of the circuit. Below you can see that the design shown in the schematic provides a 2.66 ms pulse on the output when the trigger pin is pulled…
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…
Part Number: LMC555 Good day Colleagues,
I understand, the threshold highly dependand on external RC tolerances, but could you tell me how this circuit inside depends on temperature?
the datasheet says the paramiters at +25 degC. Could you tell me what…
Part Number: LMC555LMC555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…
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…
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…
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