I dont know whether it is NJ 4556 or CD4556.

[mahesh n r]

Sir
My doubt is about an ultrasonic receiver circuit. The circiut is deccribed in the below link. **broken link removed** In the figure -13 in page 9 of this document show an IC 4556. I dont know whether it is NJ 4556 or CD4556. Please respond to me.
Thank you
Mahesh

 

[unkarc]

Hi,

It can only be an operational amplifier so the CD4556 is out of question.

See this possible datasheet for NJM 4556

https://www.digchip.com/datasheets/parts/datasheet/330/NJM4556A-pdf.php

You can use any low noise op amp in the same circuit instead if the NJM is not available for you

unkarc