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Hi team,

I need a simple circuit to generate a PWM of 1HZ, duty 50%, to drive electro-magnet.

I downlaoded Tina file on link https://www.ti.com/lit/tsc/slfm002, and modified R2/R3/C1.

but looks Simualtion and Calcuation…

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Hi Experts,

Could you pls help double check if LMC555CN/NOPB could be bom to bom with NE555P (pin to pin and the external circuits are the same)? Thanks!

BR,

Skylar

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Hi. We're getting parts marked LMC555CM with the National Semiconductor logo. However, we're having temperature issues, and wondered if the 555 might be counterfeit. Is it still produced with the National Semiconductor…

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Hi TI team,

I'm having trouble simulating LMC555 (TLC555_6) in LTSpice and PSpice. 

First is the LTSpice on a Mac OS. I have a very simple Astable…

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Hi TI team,

I'm looking for the LMC555 Spice model for power, stability and input impedance study. Where can I find this model? Thanks. 

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Hello TI.  What is the difference between the obsolete PN LMC555CM/NOPB and the active PN LMC555CMX/NOPB?  I can't seem to find anything in the datasheet other than ordering/packaging information details re "Eco Plan,"…

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Hi Experts,

I have attached the schematic and list of components:

I have not been able to do an actual test to see how much current it is drawing; it is very difficult…

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Hi,

Could you provide reference design to get trigger signal after 8 hours?

MCU will give the signal to timer…

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Please provide maximum Junction temperature for the part LMC555IMX/NOPB.

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Hi all,

About the changes from Revision M to N (Changing the constants of Ra and Rb).

I think the waveform period changes from about 150 μs to 70 μs depending on Ra to Rb.

Am I correct in understanding that the…

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Can you please tell me which are the differences between TLC555 & AS555? For a new design, which one do you recommend me?

Thanks,

Marina.

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Hello,

My customer has unexpected output pulse issue just after startup like this thread shows.  Since the output of LMC555 controls the motor driver in their system…

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Hallo TI,

I would like to get information about the input structures of LMC555. I read on forums that it has some input clamp diodes, but the datasheet does not mention it, no input clamp limit in "absolute maximum…

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Hello

I'm wondering what's the best way to build a PWM generator (that modulates an AC signal into PWM waveform) using one of the TI timers? I need PWM frequency to be 1Mhz…

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The following is the timing accuracy listed in the datasheet,
For example, it is 1.1ms (Typ) at Vs=5V,
Is this 1.1ms (maximum variation 1.2ms) regardless of the operating frequency?
Or did you mean that it varies by a…

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We have used a LMC555CMM Timer as a pulse extender for a power button using the circuit below. The system can either be powered from an external DC Supply or from a removable battery. +V.PERM is the power supply applied…

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Hi TI service team,

For LM555CMMX timer application in my system, I have questions about the functional operation want to consult with you.

For my requirements, I want to…

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Hi, 

Customer has an application question about using LM555CMX/NOPB to implement the virtual reseat. Below is my schematic design.

As I know, LM555 would output a high pulse when trigger voltage less than 1/3 Vcc untill…

Hi,

The following changes have been made to the Revision N datasheet: However, the yellow highlight is VS=1.5 V. Is this VS=5 V correct?

If so, do you plan to modify the datasheet? Could you tell me when you will modify it?

Best Regards…

I am attempting to setup the TLC556 duel timer to control both frequency and Pulse Width of the output frequency.  I have set up the first stage in Astable operation to generate a period…

Hi E2E,

There're some question about TLC555 design.

1. For Monostable design. Is it required for input low time?
2. RA=10M ohm C = 1uF, is it maximum ? or could I set to 20M ohm + 1uF?

We using an NE555PWR chip (+ another IC) in a simple design to turn a momentary button into a latching button with a 2 second cooldown period between button presses. See attached condensed…

Dear,

My name is Yonemura from Omron corporation.

Please tell me about PCN#20240306005.1.

1. Is there an English datasheet for Rev.M? Or you can use Rev.N Japanese data sheet.

2. Is there any material comparing RevM and N?

Best regards…

Regarding PCN PCN# 20240221002.1....For this PCN which is for both a fab change and assembly site change, IBM has questions regarding the package rel data.  We have qualified the HFTF facility for TSSOP package for TI, but we need additional…

Dears,

At present, the circuit we design first outputs a high level signal (2.6V or 3.3V, with a maximum drive current of 20mA) to the second pin of the LMC555CMX chip, and then power on the…