Texas Instruments <br/><br/>
The ttl databook for design engineers , semiconductors group 

 - USA  TEXAS INSTRUMENTS  1981 
<br/><br/><label>Subjects--Topical Terms: </label><br/>DATA BOOK-TTL FOR DESIGN ENGINEERS
<br/><br/><label>Dewey Class. No.: </label>621.3815 TTL'D