Talk:U880

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Pin spacing[edit]

We say "40 pin DIL package" but were the pins on 0.1 inch (2.54 mm) centers or on 2.5 mm centers? Would this have fit into a Western 40 pin DIP socket? --Wtshymanski (talk) 19:55, 15 January 2018 (UTC)[reply]

@Wtshymanski: As far as I know most U880 were manufactured with a 2.5 mm pin spacing. However, the export versions (80-CPU) as well as most U880 manufactured after 1990 probably had 2.54 mm pin spacing. Drahtlos (talk) 20:01, 15 January 2018 (UTC)[reply]

Now to find citations for that so we can put it into the article. Must have been tough, maintaining two production lines, one with 2.54 spacing and one with 2.50. --Wtshymanski (talk) 20:43, 15 January 2018 (UTC)[reply]

Both versions came of the same production line, only the metal part differed. A look at the images in the article will make this clearer: For a part with 2.5mm spacing (e.g. UA880D) the narrow part of all pins is in the centre of the wide part. For a part with 2.54mm spacing (80A-CPU) the narrow part is in the centre of the wide part only for the pins in the middle while at the end the narrow part is offset to the side. In other words, the plastic package and the metal inside the package are the same for both pin spacings. And yes, finding a citation is the hard part - I have not found anything so far. Drahtlos (talk) 20:55, 15 January 2018 (UTC)[reply]

It is not, however, a direct copy[edit]

The die looks awfully similar though. Are we sure it isn't just some sort of copying inaccuracy? Something that hasn't been copied with enough fidelity to work properly, or some oversight, some missed gate or other during copying?