I have a 1978 TI TTL databook to hand, if you think that would be any use. It would have the spcs for the devices you mention (but I suppose they might have improved them between 1973 and 1978). I won't have OEM pricing information, alas. I might be able to find old adverts selling 1-offs to hobbyists, but that's all. I've kept all my old databooks. Darn it, I need them.. I use them virtually every day (for design and repair...) -tony

Tom Gardner wrote: I'm just out of your range. I have the Texas Instruments TTL Data Book for Design Engineers, Second Edition, 1976. The clocks are in here, but no prices. Bill

On 2010 Aug 20, at 11:23 AM, Tom Gardner wrote: Well, just to add to the list, I have the 1969, 1973 and 1981 TTL databooks from TI, as well as a 1965 TI component catalog listing some TTL devices (also various from Fairchild, National and Moto). As with others though, I haven't managed to dig up any prices. Here are a few datapoints for max clock rates: book device min typical full title/desc ------- ------ ------ ------- ----------------- TI/1965 7470 (40ns->25MHz)[1] "1965 Semiconductor and Components Catalog" TI/1969 74H106 40 MHz 50 MHz "TTL Integrated Circuit Catalog TI/1973 74S112 80 MHz 125 MHz "The TTL Data Book for Design Engineers", Copyright 1973 TI/1981 74S112 80 MHz 125 MHz "The TTL Data Book for Design Engineers - Second Edition", Copyright 1981, 3rd Printing In each book those are the highest rates I see for single/dual FFs. So it appears for such devices 7400 TTL had plateaued at 125 MHz by 1973 (if not earlier). MSI counters show lower max rates. [1] The 1965 ref presents only a 40ns propagation delay.