Getting started with 7400/4000-series logic. Which parts to stock? - Page 1
Forum section: electronics / beginners

author: TimNJ
author_rank: Super Contributor
timestamp: May 28, 2013, 10:57:04 pm
content: Hello,I'm making a pretty big order off of Mouser with some standard parts, both passives, and semiconductors. I've got a whole slew of capacitors and resistors. I also selected a few op amps, comparators, and a few 555s.I understand 7400/4000 series logic is pretty old at this point, and perhaps not as useful as it used to be, I still want to learn how to use them so that I can understand and build more complex things later, perhaps with CPLDs/FPGAs.They are not too expensive, usually around $0.50/chip, but there's just so many of them. What would be some good ones to stock up on? Any ideas for an absolute beginner?Thanks.

author: c4757p
author_rank: Super Contributor
timestamp: May 28, 2013, 11:39:42 pm
content: Quote from: wilfred on May 28, 2013, 11:37:45 pmDo these even still exist?

author: TimNJ
author_rank: Super Contributor
timestamp: May 28, 2013, 11:46:05 pm
content: I was going to buy 74hc. How many do you think I should buy of each if I'm just learning?Thanks!

author: Paul Price
author_rank: Super Contributor
timestamp: May 28, 2013, 11:48:45 pm
content: I just pulled a whole mess of them out of my first computer, which was just a motherboard I bought as a kit.This old Apple 1 motherboard was getting to be not some much fun to play with. I got tired of not being able to play anything but tic-tac-toe on that same little monochrome monitor and goofy keyboard that it didn't even come with and decided to gut this old piece of junk, so I ripped out all of them, got a whole bunch of nice 74LSxxx and a few CMOS chips out of this board and tossed this thing out.

author: TerminalJack505
author_rank: Super Contributor
timestamp: May 28, 2013, 11:51:18 pm
content: If you have a 2nd edition ofPractical Electronics for Inventors, there is a "Decent Stockpile of Electrical Components" list on pages 891 and 892. The author lists a bunch of 74xx and 4000-series parts that he recommends to have on-hand.If you don't have the book, let me know and I'll copy the list and post it.

author: TimNJ
author_rank: Super Contributor
timestamp: May 28, 2013, 11:57:38 pm
content: One of my classmates has it. I've read through it, wonderful book, but I don't actually own it.It would be awesome if you could share. Thanks.

author: TerminalJack505
author_rank: Super Contributor
timestamp: May 29, 2013, 12:52:40 am
content: Here's what's on his list for 74xx-series parts:74x00 Quad 2-input NAND74x02 Quad 2-input NOR74x04 Hex inverter74x08 Quad 2-input AND74x10 Triple 3-input NAND74x11 Triple 3-input AND74x14 Hex inverter Schmitt trigger74x16 Hex inverter buffer/driver (open collector)74x20 Dual 4-input NAND74x30 8-input NAND74x32 Quad 2-input OR74x38 Quad 2-input NAND buffer (O.C.)74x47 BCD-to-7 seg. decoder/driver74x70 Edge-triggered JK flip-flop74x74 Dual D flip-flop74x85 4-bit magnitude comparator74x95 4-bit parallel shift register74x107 Dual JK flip-flop w/ clear74x123 Monostable multivibrator74x132 Quad 2-input NAND Scmitt trigger74x138 3-to-8 decoder/demultiplexer74x151 8-input multiplexer74x153 Dual 4/1 data selector/multiplexer74x154 4/16 line decoder74x157 Quad 2/1 data selector74x164 8-bit serial shift register74x174 Hex D-type flip-flop w/ clear74x193 Binary up/down counter w/ clear74x240 Octal invert. line driver tri-state74x244 Octal driver tri-state74x245 Octal bus transceiver tri-state74x273 Octal D-type flip-flop with clear74x279 Quad set-reset latch74x373 Octal D flip-flop tri-state74x374 Octal D f.f. edge-triggered tri-stateAnd here's his list for 4000-series parts:4001 Quad 2-input NOR gate4011 Quad 2-input NAND gate4013 Dual D flip-flop with set/reset4015 Dual 4-stage static shift register4016 Quad bilateral switch4017 Decade counter/divider4020 14-stage binary ripple counter4023 Triple 3-input NAND gate4024 7-stage binary counter4027 Dual JK master-slave flip-flop4040 12-stage binary ripple counter4046 Micropower phase-locked loop4049 Hex buffer/converter (inverting)4050 Hex buffer/converter (non-inverting)4051 Single 8-chan. multiplexer/demultiplexer4066 Quad bilateral switch4069 Hex inverter4070 Quad Exclusive-OR gate4071 Binary up/down counter w/ clear4081 Quad 2-input AND gate4093 Quad 2-input NAND Schmitt trigger4511 BCD to 7-seg. latch/decoder/driver4538 Dual monostable multivibrator4543 BCD to 7-segment decoder4584 Hex Schmitt trigger

author: TimNJ
author_rank: Super Contributor
timestamp: May 29, 2013, 01:44:49 am
content: Wow that's a lot of parts! I'll have to see if I can filter through those at all, though I think I'll just focus mainly on the basic gates and inverters and stuff. But thanks for all of the advice. I'll definitely use it.

author: Paul Moir
author_rank: Frequent Contributor
timestamp: May 29, 2013, 02:09:21 am
content: General random personal comments on the above list:74x00 Quad 2-input NAND74x02 Quad 2-input NOR74x04 Hex inverter74x08 Quad 2-input AND74x10 Triple 3-input NAND74x11 Triple 3-input AND74x14 Hex inverter Schmitt trigger All check. '07 or '06 are handy for open collector outputs. Pick one.74x16 Hex inverter buffer/driver (open collector) Never used it personally74x20 Dual 4-input NAND Sorta Check74x30 8-input NAND Sorta Check74x32 Quad 2-input OR Check74x38 Quad 2-input NAND buffer (O.C.) Never used it74x47 BCD-to-7 seg. decoder/driver OK if your into driving 7 seg LED displays...74x70 Edge-triggered JK flip-flop Never used it74x74 Dual D flip-flop Classic74x85 4-bit magnitude comparator Never used it74x95 4-bit parallel shift register Never used it74x107 Dual JK flip-flop w/ clear Handy74x123 Monostable multivibrator Neat chip74x132 Quad 2-input NAND Scmitt trigger Have used rarely.74x138 3-to-8 decoder/demultiplexer Use regularly. Handy.74x151 8-input multiplexer Never used once.74x153 Dual 4/1 data selector/multiplexer Never used once.74x154 4/16 line decoder Used, but in awkward large package. Two '138s are often better, and their multiple chip selects make it easy.74x157 Quad 2/1 data selector Never used74x164 8-bit serial shift register Neat chip. EDIT: '299 is sort of the opposite for serial->parallel tasks.74x174 Hex D-type flip-flop w/ clear Classic. But a pair of '74s do in a pinch.74x193 Binary up/down counter w/ clear Classic. That's the counter you want.74x240 Octal invert. line driver tri-state Not much use. Awkward pinout.74x244 Octal driver tri-state Not much use, awkward pinout (get '245s instead. Not awkward and bidirectional if you need it). Like the '240 somewhat old school.74x245 Octal bus transceiver tri-state If you are into buses this is one handy chip. Good logical pinout.74x273 Octal D-type flip-flop with clear Never used.74x279 Quad set-reset latch Never used.74x373 Octal D flip-flop tri-state Used, but get '573 instead for better pinout.74x374 Octal D f.f. edge-triggered tri-state Used, but get '574 instead for better pinout.CMOS - I haven't done nearly as much CMOS:4001 Quad 2-input NOR gate4011 Quad 2-input NAND gate4013 Dual D flip-flop with set/reset All classic must haves.4015 Dual 4-stage static shift register Never used it.4016 Quad bilateral switch I think I used it once. 4066 much more.4017 Decade counter/divider Fun.4020 14-stage binary ripple counter Pretty fun.4023 Triple 3-input NAND gate Never used it4024 7-stage binary counter Didn't use it.4027 Dual JK master-slave flip-flop Didn't use it4040 12-stage binary ripple counter Fun too.4046 Micropower phase-locked loop Amazingly cool but sometimes frustrating chip. Must have a couple. PLL learning tool!4049 Hex buffer/converter (inverting) Classic4050 Hex buffer/converter (non-inverting) Never used.4051 Single 8-chan. multiplexer/demultiplexer Classic.4066 Quad bilateral switch Classic.4069 Hex inverter Classic.4070 Quad Exclusive-OR gate Didn't use.4071 Binary up/down counter w/ clear Didn't use.4081 Quad 2-input AND gate Have used sometimes.4093 Quad 2-input NAND Schmitt trigger Have used.4511 BCD to 7-seg. latch/decoder/driver Seen used?4538 Dual monostable multivibrator Not familiar at all.4543 BCD to 7-segment decoder Are you planning on driving 7 segment LED displays?4584 Hex Schmitt trigger Haven't used.

author: edpalmer42
author_rank: Super Contributor
timestamp: May 29, 2013, 02:15:10 am
content: You might want to look at getting at least a few 74AC series parts - at least the 74AC04 hex inverter. They have the ability to directly drive a standard 50 ohm load. Very nice if you want to interface something to a 50 ohm device.Ed

author: TerminalJack505
author_rank: Super Contributor
timestamp: May 29, 2013, 02:21:07 am
content: Quote from: TimNJ on May 29, 2013, 01:44:49 amThat's probably a good idea. I think that you will find that--no matter how many different parts you have on-hand--you will never have all of the parts you need. That's how it works for me, anyway.

author: mimmus78
author_rank: Unknown
timestamp: May 29, 2013, 10:15:12 pm
content: Quote from: Paul Price on May 28, 2013, 11:48:45 pmHope it was not one of those first modelas of 2012, apx. 40-50 Apple I computers are documented to exist (plus an indefinite number of possible unreported cases), making it a very rare collector's item.On May 25, 2013, a functioning 1976 model was sold for a record €516,000 (US$668,000) in Cologne. Auction Team Breker said an Asian client bought the Apple 1, which Steve Jobs and Steve Wozniak built in a family garage. Breker says it is one of only six known remaining functioning models in the world. This particular unit has Wozniak's signature. An old business transaction letter from Jobs also was included, as well as the original owner's manual.FROM WIKIPEDIA

author: rolycat
author_rank: Super Contributor
timestamp: May 29, 2013, 10:51:22 pm
content: Quote from: c4757p on May 28, 2013, 11:39:42 pmAt least one does...The 7407 hex buffer is still widely available since it has open collector outputs which can go up to 30 V.Farnell still have some other vanilla 7400 series chips, such as the 7400 itself, the 7404, and a few others.

author: johnboxall
author_rank: Unknown
timestamp: May 30, 2013, 01:14:49 am
content: Quote from: Paul Price on May 28, 2013, 11:48:45 pmNice one.