Discreet Logic

555s

Unused pins

families of discrete logic

See also:

• http://www.hitex.com/~chipdir/
• http://www.chipinfo.ru/e/ Russian site but now also in English.
• http://www.icmaster.com/ Register in advance.
• http://www.questlink.com/ Register before you ask for datasheets. Some chips can be ordered online
• http://www.semi.com.tw/ Search engine in Taiwan with many datasheets
• http://www.semidex.com/ Specializing in memory and boards.
• http://www.ti.com/sc/docs/products/logic/allfam.html
• http://www.ti.com/sc/docs/products/index.htm

See also:

• opencollector Open Collector