[cctalk] Re: typical IC kits on Amazon and elsewhere
On 3/31/2024 3:03 PM, Adrian Godwin via cctalk wrote: Has anyone had problems with LCSC ? I've not, but I have used https://www.utsource.net/ with good luck. Jim
[cctalk] Re: typical IC kits on Amazon and elsewhere
Has anyone had problems with LCSC ? They can be a lot cheaper than mouser or digikey but I tend to trust them more than Aliexpress and ebay. On Sun, Mar 31, 2024 at 7:18 AM Don R via cctalk wrote: > My problem with DigiKey is tacking on the additional “tariff” charge on > invoices. Granted it’s not an extreme amount, but still… > > I contacted Mouser about imposing additional tariff charges, and was told > a resounding no. > > Thanks to our past president for increasing the cost of doing business, > and thanks to our current president for not caring enough to roll it back. > > Getting off soap box. :o) > > Don Resor > > Sent from someone's iPhone > > > On Mar 30, 2024, at 8:48 PM, Tom Hunter via cctalk < > cctalk@classiccmp.org> wrote: > > > > I am very happy to buy from Amazon and Digikey even if sometimes they > are a > > little more expensive. I want them to be around for the long term, so I > > support them as much as possible. Their range is amazing. > > > >> On Sun, 31 Mar 2024, 10:53 am Glen Slick via cctalk, < > cctalk@classiccmp.org> > >> wrote: > >> > >>> On Sat, Mar 30, 2024 at 5:11 PM Jonathan Chapman via cctalk > >>> wrote: > >>> > Standard TTL 74XXX is drying up rather quickly. Futurlec still has > some > TTL but 7404s are all gone. Even LS is hard to find. > >>> > >>> Ours comes from Mouser, between two part #s they have over 7,000 > 74LS04s > >> in DIP packaging in stock. Didn't check ACT, HCT, or ALS. I don't think > >> we've had a 7400 series part that we couldn't just order off Mouser in > >> recent history, and we're usually buying QTY 100. > >>> > >> > >> You can also buy parts direct from TI, for example they currently show > >> around around 3000 SN74LS04N parts in stock. > >> > >> https://www.ti.com/product/SN74LS04/part-details/SN74LS04N > >> > >> The prices for that part match the current Mouser prices of $0.674 > >> each, or $0.519 each if you buy at least 4 tubes of 25 parts. > >> > >> I've bought some tubes of 74LS parts direct from TI in the last year. > >> > > > >
[cctalk] Re: typical IC kits on Amazon and elsewhere
On Sun, Mar 31, 2024 at 8:15 AM John Robertson via cctalk wrote: > > On 2024/03/30 7:53 p.m., Glen Slick via cctalk wrote: > > On Sat, Mar 30, 2024 at 5:11 PM Jonathan Chapman via cctalk > > wrote: > >>> Standard TTL 74XXX is drying up rather quickly. Futurlec still has some > >>> TTL but 7404s are all gone. Even LS is hard to find. > >> Ours comes from Mouser, between two part #s they have over 7,000 74LS04s > >> in DIP packaging in stock. Didn't check ACT, HCT, or ALS. I don't think > >> we've had a 7400 series part that we couldn't just order off Mouser in > >> recent history, and we're usually buying QTY 100. > >> > > You can also buy parts direct from TI, for example they currently show > > around around 3000 SN74LS04N parts in stock. > > > > https://www.ti.com/product/SN74LS04/part-details/SN74LS04N > > > > The prices for that part match the current Mouser prices of $0.674 > > each, or $0.519 each if you buy at least 4 tubes of 25 parts. > > > > I've bought some tubes of 74LS parts direct from TI in the last year. > > Interesting, but does TI offer free international shipping with import > duties & taxes covered if you order over $100US? > > John :-#)# My last order directly from TI was 2.5 years ago, longer than I remembered. Back in November 2021, in addition to the line item cost for each quantity of parts that I ordered, there was a total shipping charge, plus the total local WA state sales tax charge. There was no separate import charge. The shipping charge at the time seemed very reasonable. For one order of 4 tubes of DIP parts it was $7 total, with that shipping charge then split between FedEx shipping from TX for some parts, and DHL shipping from ASIA for other parts. I forget why I ordered directly from TI at the time. Maybe they had some of the parts in stock that were not currently in stock at Mouser or Digi-Key, or maybe the total with shipping was lower than at either Mouser or Digi-Key.
[cctalk] Re: typical IC kits on Amazon and elsewhere
On 2024/03/30 7:53 p.m., Glen Slick via cctalk wrote: On Sat, Mar 30, 2024 at 5:11 PM Jonathan Chapman via cctalk wrote: Standard TTL 74XXX is drying up rather quickly. Futurlec still has some TTL but 7404s are all gone. Even LS is hard to find. Ours comes from Mouser, between two part #s they have over 7,000 74LS04s in DIP packaging in stock. Didn't check ACT, HCT, or ALS. I don't think we've had a 7400 series part that we couldn't just order off Mouser in recent history, and we're usually buying QTY 100. You can also buy parts direct from TI, for example they currently show around around 3000 SN74LS04N parts in stock. https://www.ti.com/product/SN74LS04/part-details/SN74LS04N The prices for that part match the current Mouser prices of $0.674 each, or $0.519 each if you buy at least 4 tubes of 25 parts. I've bought some tubes of 74LS parts direct from TI in the last year. Interesting, but does TI offer free international shipping with import duties & taxes covered if you order over $100US? John :-#)# -- John's Jukes Ltd. 7 - 3979 Marine Way, Burnaby, BC, Canada V5J 5E3 Call (604)872-5757 (Pinballs, Jukes, Video Games) flippers.com "Old pinballers never die, they just flip out"
[cctalk] Re: typical IC kits on Amazon and elsewhere
My problem with DigiKey is tacking on the additional “tariff” charge on invoices. Granted it’s not an extreme amount, but still… I contacted Mouser about imposing additional tariff charges, and was told a resounding no. Thanks to our past president for increasing the cost of doing business, and thanks to our current president for not caring enough to roll it back. Getting off soap box. :o) Don Resor Sent from someone's iPhone > On Mar 30, 2024, at 8:48 PM, Tom Hunter via cctalk > wrote: > > I am very happy to buy from Amazon and Digikey even if sometimes they are a > little more expensive. I want them to be around for the long term, so I > support them as much as possible. Their range is amazing. > >> On Sun, 31 Mar 2024, 10:53 am Glen Slick via cctalk, >> wrote: >> >>> On Sat, Mar 30, 2024 at 5:11 PM Jonathan Chapman via cctalk >>> wrote: >>> Standard TTL 74XXX is drying up rather quickly. Futurlec still has some TTL but 7404s are all gone. Even LS is hard to find. >>> >>> Ours comes from Mouser, between two part #s they have over 7,000 74LS04s >> in DIP packaging in stock. Didn't check ACT, HCT, or ALS. I don't think >> we've had a 7400 series part that we couldn't just order off Mouser in >> recent history, and we're usually buying QTY 100. >>> >> >> You can also buy parts direct from TI, for example they currently show >> around around 3000 SN74LS04N parts in stock. >> >> https://www.ti.com/product/SN74LS04/part-details/SN74LS04N >> >> The prices for that part match the current Mouser prices of $0.674 >> each, or $0.519 each if you buy at least 4 tubes of 25 parts. >> >> I've bought some tubes of 74LS parts direct from TI in the last year. >> >
[cctalk] Re: typical IC kits on Amazon and elsewhere
On 2024-03-30 9:49 p.m., Tom Hunter via cctalk wrote: Sorry I mistyped. I meant Mouser and Digikey, not Amazon and Digikey. Well the searches suck on both. Digikey is bad for having 0 stock listings. Digikey is turning out to be more the Radio Shack for parts.
[cctalk] Re: typical IC kits on Amazon and elsewhere
On 2024-03-30 8:53 p.m., Glen Slick via cctalk wrote: You can also buy parts direct from TI, for example they currently show around around 3000 SN74LS04N parts in stock. https://www.ti.com/product/SN74LS04/part-details/SN74LS04N The prices for that part match the current Mouser prices of $0.674 each, or $0.519 each if you buy at least 4 tubes of 25 parts. I've bought some tubes of 74LS parts direct from TI in the last year. 185 In Stock 595-SN7404NE4 prices in canadian $'s QTY 1 $3.84 QTY 1000 $1.89
[cctalk] Re: typical IC kits on Amazon and elsewhere
On 2024-03-30 8:23 p.m., Jonathan Chapman via cctalk wrote: Been lurking for a while, but this topic hits true with some recent experiences. I would not hesitate to buy most common digital ICs on Amazon or ebay I mean we had to stop buying 7400 series from Jameco over counterfeits, so it's definitely a problem for jellybean parts too. We had so many reject 74F573 latches go out in XT-IDE kits we just scrapped the remaining Jameco-provided inventory. We also started having issues with 28C64B EEPROMs from them, obvious relabels that wouldn't program with the Atmel SDP algorithm -- that's actually why they started shipping pre-programmed in kits! Real shame, I've bought from Jameco since I was a kid, they'd actually sell to Just Some Kid :P Personally I'm not willing to save the relatively small amount of money on TTL by buying from random sources. It's especially infuriating when you're building something for the first time (prototypes, someone else's project you've never put together, etc.) and it turns out to be a dead 25 cent chip. Thanks, Jonathan Well the pal programmer I have does test TTL, a handy option, for junk box stuff. I tend to have a bad habit of putting in parts upside dowm or the wrong programmed part, for the simple fact DARK plastic hard to read in most homes with dark gray labels.
[cctalk] Re: typical IC kits on Amazon and elsewhere
On 3/30/2024 10:49 PM, Tom Hunter via cctalk wrote: Sorry I mistyped. I meant Mouser and Digikey, not Amazon and Digikey. Whew! I was playing that Sesame Street "which of these is NOT like the other" song in my head reading your earlier post. :-) Since Digikey/Mouser/RS don't always have some of the more esoteric ICs I need, I do sometimes have to hit the secondary markets. I can confirm there are reputable places to do so, but I agree there has to be a compelling reason to forego places like Digikey. I find it telling that my non US PCBA buys all the actives from Digikey or Mouser and will consider only passives from local sources. Of course, that means I pay a US outbound tariff on the active parts and then an inbound tariff on the completed products, thus paying tariff costs twice. Jim -- Jim Brain br...@jbrain.com www.jbrain.com
[cctalk] Re: typical IC kits on Amazon and elsewhere
Sorry I mistyped. I meant Mouser and Digikey, not Amazon and Digikey. On Sun, 31 Mar 2024, 11:48 am Tom Hunter, wrote: > I am very happy to buy from Amazon and Digikey even if sometimes they are > a little more expensive. I want them to be around for the long term, so I > support them as much as possible. Their range is amazing. > > On Sun, 31 Mar 2024, 10:53 am Glen Slick via cctalk, < > cctalk@classiccmp.org> wrote: > >> On Sat, Mar 30, 2024 at 5:11 PM Jonathan Chapman via cctalk >> wrote: >> > >> > > Standard TTL 74XXX is drying up rather quickly. Futurlec still has >> some >> > > TTL but 7404s are all gone. Even LS is hard to find. >> > >> > Ours comes from Mouser, between two part #s they have over 7,000 >> 74LS04s in DIP packaging in stock. Didn't check ACT, HCT, or ALS. I don't >> think we've had a 7400 series part that we couldn't just order off Mouser >> in recent history, and we're usually buying QTY 100. >> > >> >> You can also buy parts direct from TI, for example they currently show >> around around 3000 SN74LS04N parts in stock. >> >> https://www.ti.com/product/SN74LS04/part-details/SN74LS04N >> >> The prices for that part match the current Mouser prices of $0.674 >> each, or $0.519 each if you buy at least 4 tubes of 25 parts. >> >> I've bought some tubes of 74LS parts direct from TI in the last year. >> >
[cctalk] Re: typical IC kits on Amazon and elsewhere
I am very happy to buy from Amazon and Digikey even if sometimes they are a little more expensive. I want them to be around for the long term, so I support them as much as possible. Their range is amazing. On Sun, 31 Mar 2024, 10:53 am Glen Slick via cctalk, wrote: > On Sat, Mar 30, 2024 at 5:11 PM Jonathan Chapman via cctalk > wrote: > > > > > Standard TTL 74XXX is drying up rather quickly. Futurlec still has some > > > TTL but 7404s are all gone. Even LS is hard to find. > > > > Ours comes from Mouser, between two part #s they have over 7,000 74LS04s > in DIP packaging in stock. Didn't check ACT, HCT, or ALS. I don't think > we've had a 7400 series part that we couldn't just order off Mouser in > recent history, and we're usually buying QTY 100. > > > > You can also buy parts direct from TI, for example they currently show > around around 3000 SN74LS04N parts in stock. > > https://www.ti.com/product/SN74LS04/part-details/SN74LS04N > > The prices for that part match the current Mouser prices of $0.674 > each, or $0.519 each if you buy at least 4 tubes of 25 parts. > > I've bought some tubes of 74LS parts direct from TI in the last year. >
[cctalk] Re: typical IC kits on Amazon and elsewhere
On Sat, Mar 30, 2024 at 5:11 PM Jonathan Chapman via cctalk wrote: > > > Standard TTL 74XXX is drying up rather quickly. Futurlec still has some > > TTL but 7404s are all gone. Even LS is hard to find. > > Ours comes from Mouser, between two part #s they have over 7,000 74LS04s in > DIP packaging in stock. Didn't check ACT, HCT, or ALS. I don't think we've > had a 7400 series part that we couldn't just order off Mouser in recent > history, and we're usually buying QTY 100. > You can also buy parts direct from TI, for example they currently show around around 3000 SN74LS04N parts in stock. https://www.ti.com/product/SN74LS04/part-details/SN74LS04N The prices for that part match the current Mouser prices of $0.674 each, or $0.519 each if you buy at least 4 tubes of 25 parts. I've bought some tubes of 74LS parts direct from TI in the last year.
[cctalk] Re: typical IC kits on Amazon and elsewhere
> Been lurking for a while, but this topic hits true with some recent > experiences. I would not hesitate to buy most common digital ICs on Amazon > or ebay I mean we had to stop buying 7400 series from Jameco over counterfeits, so it's definitely a problem for jellybean parts too. We had so many reject 74F573 latches go out in XT-IDE kits we just scrapped the remaining Jameco-provided inventory. We also started having issues with 28C64B EEPROMs from them, obvious relabels that wouldn't program with the Atmel SDP algorithm -- that's actually why they started shipping pre-programmed in kits! Real shame, I've bought from Jameco since I was a kid, they'd actually sell to Just Some Kid :P Personally I'm not willing to save the relatively small amount of money on TTL by buying from random sources. It's especially infuriating when you're building something for the first time (prototypes, someone else's project you've never put together, etc.) and it turns out to be a dead 25 cent chip. Thanks, Jonathan
[cctalk] Re: typical IC kits on Amazon and elsewhere
Been lurking for a while, but this topic hits true with some recent experiences. I would not hesitate to buy most common digital ICs on Amazon or ebay, but I usually will not buy analog ICs other than from trusted sources, such as Mouser. I have bought LM2596 voltage regulators that oscillate at the wrong frequency (which breaks all the calculations for selecting the inductor), and I have bought MAX202/MAX232 serial drivers that burn up in circuit. Switching to official sources cured both of those problems. You also have to be careful of things like SRAM (for example AS6C4008) as I have found the cheap ones don't meet the performance of the ones from Mouser, even though the silkscreen says they're the same manufacturer and speed. If you're paying more than an order of magnitude less for something than it sells for on Mouser, it's probably not the same part. UTSource used to be good, but I found now commonly engages in bait and switch. A week after I submit an order, I would get some email claiming a supply issue and demanding that I submit additional paypal payment for my order to ship The last order, this happened on two different part numbers, one went from $14/IC to $50/IC and another part went from $5/IC to $12/IC. This had happened several times over the last couple months with them. Maybe they really are having issues with their suppliers (though I swear this was happening on items where UTSource itself was listed as the supplier) but that's not really my concern. They were becoming a huge waste of time and source of frustration. I put them on vacation Aliexpress is full of fakes, on anything and everything, and sometimes you have to repeatedly argue to get your money back. eBay is better at siding with the buyer. Scott On Sat, Mar 30, 2024 at 6:22 PM ben via cctalk wrote: > On 2024-03-30 6:10 p.m., Jonathan Chapman via cctalk wrote: > >> Standard TTL 74XXX is drying up rather quickly. Futurlec still has some > >> TTL but 7404s are all gone. Even LS is hard to find. > > > > Ours comes from Mouser, between two part #s they have over 7,000 74LS04s > in DIP packaging in stock. Didn't check ACT, HCT, or ALS. I don't think > we've had a 7400 series part that we couldn't just order off Mouser in > recent history, and we're usually buying QTY 100. > > > > Thanks, > > Jonathan > > I checked mouser (canada) again. After about 3 pages of garbage matches, > I found some 7904's in DIP packages, only a few 100 in stock. > > TI and Motorola sell 74LS541's but only the Motorola part has Vin Low of > .8 volts. TI has .6 Vin low. Are there any more part differences between > TI and other digital logic. > > >
[cctalk] Re: typical IC kits on Amazon and elsewhere
On 2024-03-30 6:10 p.m., Jonathan Chapman via cctalk wrote: Standard TTL 74XXX is drying up rather quickly. Futurlec still has some TTL but 7404s are all gone. Even LS is hard to find. Ours comes from Mouser, between two part #s they have over 7,000 74LS04s in DIP packaging in stock. Didn't check ACT, HCT, or ALS. I don't think we've had a 7400 series part that we couldn't just order off Mouser in recent history, and we're usually buying QTY 100. Thanks, Jonathan I checked mouser (canada) again. After about 3 pages of garbage matches, I found some 7904's in DIP packages, only a few 100 in stock. TI and Motorola sell 74LS541's but only the Motorola part has Vin Low of .8 volts. TI has .6 Vin low. Are there any more part differences between TI and other digital logic.
[cctalk] Re: typical IC kits on Amazon and elsewhere
Mouser pass the SN7404 test https://www.mouser.co.uk/c/?q=sn7404 SN74LS https://www.mouser.co.uk/c/?q=sn74ls=y=y brings up 381 lines in stock; doubtless lots of package / packaging duplicates DS8641 (Q/U bus transceiver) and suchlike are of course quite another story : substantially unobtanium Martin -Original Message- From: Jonathan Chapman via cctalk [mailto:cctalk@classiccmp.org] Sent: 31 March 2024 00:11 To: General Discussion: On-Topic and Off-Topic Posts Cc: Jonathan Chapman Subject: [cctalk] Re: typical IC kits on Amazon and elsewhere > Standard TTL 74XXX is drying up rather quickly. Futurlec still has > some TTL but 7404s are all gone. Even LS is hard to find. Ours comes from Mouser, between two part #s they have over 7,000 74LS04s in DIP packaging in stock. Didn't check ACT, HCT, or ALS. I don't think we've had a 7400 series part that we couldn't just order off Mouser in recent history, and we're usually buying QTY 100. Thanks, Jonathan
[cctalk] Re: typical IC kits on Amazon and elsewhere
On Sat, Mar 30, 2024 at 5:11 PM Jonathan Chapman via cctalk < cctalk@classiccmp.org> wrote: > > Standard TTL 74XXX is drying up rather quickly. Futurlec still has some > > TTL but 7404s are all gone. Even LS is hard to find. > > Ours comes from Mouser, between two part #s they have over 7,000 74LS04s > in DIP packaging in stock. Didn't check ACT, HCT, or ALS. I don't think > we've had a 7400 series part that we couldn't just order off Mouser in > recent history, and we're usually buying QTY 100. > Yeah, I don't see much issue with 74LS right now. Genuine 74F is getting hard to find. utsource used to be my reliable Chinese goto but a few years ago they moved to this Amazon model where they allow other sellers to list items including a lot who use names like "genuine utsource" and "real utsource store" with no way to filter them out. My last order with them just before Xmas was very poor (obvious remarks, shipped items from cheaper sellers other than the seller I selected, claimed a specific brand I needed but then sent totally different which had known timing issues). Their CS was maddening. I ended up getting a partial refund via PayPal.
[cctalk] Re: typical IC kits on Amazon and elsewhere
> Standard TTL 74XXX is drying up rather quickly. Futurlec still has some > TTL but 7404s are all gone. Even LS is hard to find. Ours comes from Mouser, between two part #s they have over 7,000 74LS04s in DIP packaging in stock. Didn't check ACT, HCT, or ALS. I don't think we've had a 7400 series part that we couldn't just order off Mouser in recent history, and we're usually buying QTY 100. Thanks, Jonathan
[cctalk] Re: typical IC kits on Amazon and elsewhere
On 2024-03-30 4:27 p.m., Will Cooke via cctalk wrote: I'm not clear on whether you mean some specific chips or in general, but here is my experience. For things that are in current production or recently discontinued, I have had extremely good luck with Chinese suppliers either from Amazon or Ebay. For things that are long out of production, such as 1802 (normal, not SOS) and 6502 processors, I've heard way too many horror stories so I look to ebay for new old stock or used from US or sometimes European suppliers. Again, I've had very good luck. In fact, I can't remember every getting any bad ones. YMMV Will Standard TTL 74XXX is drying up rather quickly. Futurlec still has some TTL but 7404s are all gone. Even LS is hard to find. Ben. Still designing that vintage computer Newer is not always better.
[cctalk] Re: typical IC kits on Amazon and elsewhere
> On 03/30/2024 3:37 PM CDT Just Kant via cctalk wrote: > > > Clearly all or virtually all chineseum, correct? > > That being the case, um, what type.of.quality can be expected? Some are > fairly cheap. I guess thenworld isn't to be expected. I'm not clear on whether you mean some specific chips or in general, but here is my experience. For things that are in current production or recently discontinued, I have had extremely good luck with Chinese suppliers either from Amazon or Ebay. For things that are long out of production, such as 1802 (normal, not SOS) and 6502 processors, I've heard way too many horror stories so I look to ebay for new old stock or used from US or sometimes European suppliers. Again, I've had very good luck. In fact, I can't remember every getting any bad ones. YMMV Will Grownups never understand anything by themselves and it is tiresome for children to be always and forever explaining things to them, Antoine de Saint-Exupery in The Little Prince
[cctalk] Re: typical IC kits on Amazon and elsewhere
On Saturday, March 30th, 2024 at 13:37, Just Kant via cctalk wrote: > Clearly all or virtually all chineseum, correct? > That being the case, um, what type.of.quality can be expected? Some are > fairly cheap. I > guess thenworld isn't to be expected. I've only bought a few in the last couple of years that fit the profile - they've been decently solid. I have the ICs used socketed just in case, but I haven't had any flatline on me so far. Call it five positive datapoints out of however many. The Doctor [412/724/301/703/415/510] WWW: https://drwho.virtadpt.net/ Don't be mean. You don't have to be mean.
