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Part Number: TLC555
This is Takanori from Japan.
I'm looking for the timeir IC which has same fucntion as TLC555 but 2 channel integrated in the one device.
Usasge of the timer is like as below figure. The image is Timer 1 creates Output A and Timer 2 creates Output B.
And hope to realize this with the one device.
I tried TLC556 but it seemed the timer fucntionality was not same as TLC555.
Welcome to the e2e forum!
The TLC556 is the dual version of the TLC555 and should perform the same as two TLC555 times.. However there is not automotive qualified TLC556-Q1.
What was your experience that leads you to believe that the TLC556 does not perform the same as TLC555?
Regards,Ronald MichallickLinear Applications
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In reply to Ron Michallick:
Your image did not show. There are ways two ways to attach files and images. I prefer the first , black arrow option.
Image using black arrow option.
Image using red arrow option.
Hello Ron san,
Thank you very muc for your feedback!
Attached is the our study result. With using TLC556, it seems the performance is not same as TLC555.
In reply to user4559181:
I built the circuit, however I had to change 1k to 1.15k due to resistor availability. So expected time is 1.1*1.15k*1uF= 1.265ms
The results were as I expected.
I suggest checking the waveforms on all the pins to see why the pulses are much shorter than expected on your test board.
All pins are important, but the timing cap waveforms will be the most useful to see.
Dear Ron san,
Thank you very much for your advice for the testing. And I'm sorry for the late feedback as I was out ot office this week.
Today, we have checked the device once again (with another new one) and confirmed that TLC556 showed correct behavior.
Please find the attached file.
It seemed that the device which we tested may have get some defect...
Again, thank you very much for your strong support and we will proceed our evauation if we can use this device for the serial production.
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