Russian ICs datasheet wanted.

[Rodelio]

I was loiking for some lm555 or lm 556 IC to start a projet and i found this sovietics ICs. I don,t know what they are. Any help will be wellcome. Thanks in advance..

[Rodelio]

[kt315]

no amigo. those are TTL '555' series chips, american analog of LS one.
down below is bulgarian 556.

[Rodelio]

Ohh, i see. Thanks KT315. I hope you are allright. Now i know that i can use the bulgarian one.

[kt315]

yes, i did set B556D in delta pulse and they are working sure good. pleasure.

[Rodelio]

I am planning to use it on polish pi to make some experimental changes on this device, like use the NE5534 instead LF357 and 7660 instead 7905 to generate the negative analogic voltage to the operationals. All this in bread board in first time . I allready build a coupple of polish pi, and i want to test some changes. It' become very dificult to find electronic components here in my country.