SN74LVC1G123: Looking for a digital line programmable delay circuit

Andras Magyar

Part Number: SN74LVC1G123

Dear Experts,

I am looking for a circuit that can program a delay to a digital line. This is used for a switch driver where one switch will be switched before the other but

I cannot use MCU for this task. I found a good circuit from ADI but I am wondering if you have something similar to this:

https://hu.mouser.com/ProductDetail/Analog-Devices/LTC6994CS6-2TRMPBF?qs=hVkxg5c3xu%252BeRKcxyMwRyA%3D%3D

Here is the waveform I want to see (both rising and falling edges has to be delayed):

Can you propose something similar to this?

Thanks a lot in advance,

Andras Magyar

over 1 year ago

0 Albert Xu1 over 1 year ago

TI__Mastermind 38445 points

Hi Andras,

Please take a look at Emrys' response in the thread below. is this similar to what you are looking for?

e2e.ti.com/.../sn74ls31-regarding-to-the-delay-line

0 Andras Magyar over 1 year ago in reply to Albert Xu1

Intellectual 400 points

Hi Albert,

These circuit delay the lines within the nanosec range. I need something that can delay one single line in the range of 500-1000ms.

LTC6994CS6-2 can do that but it cost a fortune. Could you also ask around at some colleagues who can propose some discrete solution?

What I have in mind is a RC low pass filter with a fixed time constant.

Thanks and regards,

Andras

0 Albert Xu1 over 1 year ago in reply to Andras Magyar

TI__Mastermind 38445 points

Hi Andras,

I will discuss with our team and see what we can figure out for you.

0 Andras Magyar over 1 year ago in reply to Albert Xu1

Intellectual 400 points

Hi Albert,

Thank you, then I am waiting for you replay. Actually the delay has to be placed at the output of one of the following logic OR gate IC:

So I need something on the output of CONT_L_DRV for example to delay the signal with around 0,5-1sec respect to CONT_H_DRV.

Regards,

Andras

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SN74LVC1G123: Looking for a digital line programmable delay circuit