Joined: Fri Aug 30, 2002 1:09 am
Posts: 8543
Location: Southern California
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[last updated Dec 3, 2022]
This topic is a fresh start from the topic "Where to buy a WDC 65c02 and other chip". My purpose here is to compile a list suppliers right up front and tell how to find the parts on their websites if there are any tricks to it, and keep editing this as time goes on and suppliers or the list of available parts changes, so someone doesn't have to read a long thread. For new info, reply below, or, what might be better to keep this uncluttered, send me a detailed private message.
First, a warning! (added 2/3/20): Recently there have been a lot of fake 6502's and 65c02's on eBay—fake in the sense that they're not the exact type, brand, or date that they're marked. They may also have damage which, although not necessarily making them totally non-op, keeps them from meeting spec.. Ed started a topic about it, "Bargain chips bought online - buyer beware!" which you'll want to check if you're tempted by the lower prices. Take a look at the Chinese counterfeit IC market:
https://www.youtube.com/watch?v=j9nasajve1o
https://www.youtube.com/watch?v=5vN_7NJ4qYA
Update, 9/14/20: BDD has posted information from WDC regarding foundries, dates, geometries, and markings of genuine WDC parts, things that will make it easier to weed out a lot of the counterfeits on eBay by their markings, on page 10 of this topic, at viewtopic.php?p=78283#p78283 .
Update, 7/9/21: enso posted a link to a page telling, in great detail, how to spot a counterfeit: https://www.aeri.com/counterfeit-electr ... detection/
Update, 6/29/22: Ed posted about major differences in pinouts between Rockwell and WDC 65c02's in PLCC, and that Rockwell parts were relabeled as WDC, and sold as WDC!
Now for the genuine ones:
Western Design Center (WDC) has links to distributors on their https://wdc65xx.com/where-to-buy page. WDC does sell to private individuals, but it seems better to use the distributors now since WDC is a very small company that makes most of their money licensing 65xx IP and does not appear to be set up to be very efficient with hardware orders. I understand WDC's own shipping charges are very high outside the U.S..
Mouser:
http://www.mouser.com/Search/Refine.asp ... ign+Center (you can change the country and currency in the top-right corner where you see the flag)
And Mouser UK: https://www.mouser.co.uk/search/refine. ... 4292713941
Jameco: has the W65C02S and W65C22S, over 800 of each in stock when I checked Sep 14 2020. They also have an older non-WDC NMOS 6502 and a '51.
W65C21 is mostly for replacing NMOS 6520 and CMOS 6521 For new designs, use the superior 65C22.
W65C22N versus W65C22S differences:
- The first difference is that the N version has the older type open-drain IRQ\ output, whereas the S version has a totem-pole IRQ\ output. The N version is more convenient than the newer totem-pole type output because you can connect several together without an AND gate or diodes, using a 3K pull-up resistor to Vcc. At faster bus speeds though, the IRQ\ line may not float up fast enough with the passive pull-up to be at a valid logic-high level by the time a short interrupt service routine is finished (I got bit by that once); so as bus speeds got faster, they went to the totem-pole IRQ\ output of the W65C22S. If you want a plug-in replacement for an older part without changing the circuit, you probably need the N version. For new designs, I would recommend the S version, and use an AND gate to combine multiple IRQ\ sources to go to the processor's IRQ\ input.
- The S version has much stronger output-drive capability.
- Another difference is that the S version works across a wider range of power supply voltages.
- For other differences, see the bottom of the page at http://www.westerndesigncenter.com/wdc/w65c22-chip.cfm , or the data sheets.
Unicorn Electronics:
They are still showing a lot of stock of older, slower (1-3MHz) 65xx parts at http://www.unicornelectronics.com/IC/6500.html, as of Sep 14, 2020.
65SPI chip: Daryl (8BIT) here, one of our prominent forum members, supplies an SPI-interface IC that can be put directly on the 65xx bus. Info for implementation and purchase is at https://sbc.rictor.org/65spi2.html . Note, 9/14/20: The CPLD he was using to make these got discontinued and was no longer available in 2018. The link is for the newer one he transitioned to, discussed here.
Aug 7, 2020 update: UK buyers can use Coltek and Mouser to avoid high shipping charges.
Oct 8, 2013: Jameco reportedly has reasonable shipping charges to non-USA destinations. Jameco had stopped carrying WDC parts for a while, but now is back, at least for the '02 and '22, as of 9/27/19, and re-checked 9/14/20.
Sep 9, 2015: According to floobydust's post here, Newegg is front-ending UTsource on selling some Rockwell CMOS 65xx parts. Some quantity parts are cheaper than direct from UTsource, like qty 10 R65C51P4 for $35.33. Other chips include R65C02P4 and R65C22P4. I cannot vouch for the genuineness of 65xx parts from China. See page 6 of this topic, and the warning in the second paragraph from the top of this post. They are apparently often pulls that get re-marked as different manufacturers, types, and speeds.
Nov 7, 2018: Greenlight Electronics has 65802's in stock. Search for "W65C802P." (Thankyou, Andrew Jacobs, forum name "BitWise.") The "quantity available" line indicates there are thousands, but it is clearly an item number instead. Note that it says the manufacturer is "Western Digital." That should say, "Western Design Center." I re-checked on 9/14/20 and they're still there.
Jul 24, 2021 update: chriswv3 in the UK is offering genuine original MOS ICs, including 6532 RIOTs (RAM, I/O, and timer), 6525 tri-port interfaces (TPIs), 6522's, and 6540 2Kx8 ROMs, at viewtopic.php?p=85602#p85602 on page 11 of this topic.
Nov 13, 2022 update: Reichelt Elektronik in Germany is offering WDC parts. (Thankyou ArnoldLayne for the notice on page 12 of this topic.)
Dec 3, 2022 update: Here's an available module to replace the no-longer-available 6510 and 8501: viewtopic.php?p=97038#p97038 (Thanks to forum member "rupy" for the heads-up, at viewtopic.php?p=97038#p97038 .)
_________________ http://WilsonMinesCo.com/ lots of 6502 resources
The "second front page" is http://wilsonminesco.com/links.html .
What's an additional VIA among friends, anyhow?
Last edited by GARTHWILSON on Mon Apr 09, 2012 4:48 pm, edited 2 times in total.
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