digex@world.std.com (doug e humphrey) (04/20/91)
Here is a request for help; I have found a bunch of rails of *old* chips kicking around. I am curious what they are, but my databooks are all packed up... Here is the list if anyone out there has some old books available and wants to take a moment to look them up and send me the results (I will post them to the list, just so people can see how old this junk *really* is). Thanks in advance! Doug Humphrey Digital Express Group Crypto Systems Division (this week...) SP 616 SP 659 SP 620 SP 680 SP 670 SP 663 SP 677 SP 662 MC 668 MC 672 MC 665 MC 678 MC 666 MC 679 SN 28701 SN 28703 (most likely the old op-amp)
whit@milton.u.washington.edu (John Whitmore) (04/23/91)
In article <1991Apr20.043133.2010@world.std.com> digex@world.std.com (doug e humphrey) writes: >Here is a request for help; I have found a bunch of rails of *old* >chips kicking around. >SP 616 SP 659 >SP 620 SP 680 >SP 670 SP 663 >SP 677 SP 662 >MC 668 MC 672 >MC 665 MC 678 >MC 666 MC 679 I'm not certain about the 'SP'-prefix parts, but the others are a species of TTL called 'HNIL', for High Noise-Immunity Logic. They're intended for control circuitry in very (electrically) noisy environments, having 5V logic range; mainly these were superseded by the early CMOS. This sort of component is likely 20 years old, and they originally sold for circa $2 each. MC668 quad 2-input gate with pullup resistors MC672 quad 2-input gate with active pullup MC665 HNIL/saturated logic triple level translator MC678 Hex inverter (open collector) with strobe MC666 saturated/HNIL triple level translator MC679 dual lamp driver The 'SN2xxxx' part numbers are Texas Instruments numbers, but I don't recognize 'em. They aren't op amps, 'cuz op amps were numbered 'SN72xxx'. John Whitmore