SN74LVC1G123: Using as a Delay Block

Hi Prahlad,

The SN74LVC1G123 won't generate a delay - it just generates a pulse when triggered. The accuracy is dependent on the external components (RC) and I would add about +/- 5% for the SN74LVC1G123 itself. It's not intended to be an incredibly accurate timing device.

What kind of signal is being delayed? You said 50% duty cycle, but what frequency?

For a slow signal (ie 20ms period or longer) the easiest way to add a 2ms delay would be to use a Schmitt-trigger buffer like SN74LVC1G17 with an RC circuit on the input tuned to the desired delay.  The accuracy won't be very good though - it's dependent on the input thresholds and those have a pretty wide margin on logic devices.

You could also use a comparator with a similar setup, but it will require a reference voltage.

Another very common method is to use a low cost microcontroller -- they can provide much better precision at a very low cost. This will work for very fast signals or very slow signals, and accuracy is dependent on clock frequency.