Don't know if this made it first time; if dupe, pls excuse. -----Original Message: Date: Thu, 06 Mar 2008 07:54:50 -0800 From: Bob Rosenbloom <bobalan at sbcglobal.net> Subject: Re: Obsolete chips dwight elvey wrote: I have data sheets for the following: 930 = expandable dual 4-input NAND 932 = expandable dual 4-input buffer 934 = hex inverter 936 = hex inverter 937 = hex inverter 946 = quad inverter 948 = clocked flip-flop 951 = multivibrator 962 = quad 2-input NAND gate plus inverter Bob ---------Reply: Hmm, I have slightly different info: 946 = Quad 2-input NAND 962 = Triple 3-input NAND On the other hand I can't find a 934 listed in my books... In addition: 958 = Quad 2-input power gate 1800 = Dual 5-input NAND 9093 = Dual J-K 9034 - S/B 9094 = Dual J-K 9099 = Dual J-K Also listed at Anchor: 935 = Hex Inverter (extendable) 949 = Quad 2-input NAND Equivalent devices usually differ in the value of the pullup resistor (if any): e.g. Dual 4-input NANDs: 930 = 6K P/U 932 = 2K P/U, driver 944 = O/C, driver 961 = 2K P/U The 935 was a 936 w/o any input diodes. Extendable (expandable) indicated a connection that bypassed the input diodes so that it could be externally expanded with more diodes or an extender like the 933. I still have some of these (maybe even some RTL) and of course the Databooks. Fairchild's DTL had a '9' prefix; NS used 'DM' m