| ??? 08/06/08 15:36 Read: times |
#157283 - There may be a reason for this Responding to: ???'s previous message |
When the 875x's became popular, the packaging constraints were changed. I've got visitors from out of town right now, but perhaps I can find an old databook, one from before 1982 or so, after which the changes become apparent. Once OTP's became a popular product, the packaging designators used for standard 805x's didn't readily apply, so they had to do something. This might appear in EPROMs, which also became popular OTP's as well as in MCU's. If anybody's got the old pre-1986 datasheets/databooks, that would be a better authority than my formerly "steel trap" and now more-like-a-polyethylene-colander, memory.
These never were particularly important when the parts were either EPROM- or ROM-based, but now that there are FLASH-based parts, things are different. RE |
| Topic | Author | Date |
| Full meaning of IC numbers | 01/01/70 00:00 | |
| google device + data sheet and start READING | 01/01/70 00:00 | |
| Device-specific | 01/01/70 00:00 | |
| an example | 01/01/70 00:00 | |
| OOPS, saw one 'I' too many | 01/01/70 00:00 | |
| all of what has been said, but... | 01/01/70 00:00 | |
| Only very roughly indeed... | 01/01/70 00:00 | |
| Looking For Fortues in Tea Leaves? | 01/01/70 00:00 | |
| Can you give an example? | 01/01/70 00:00 | |
| P and D | 01/01/70 00:00 | |
| I believe packaging was designated in the suffix | 01/01/70 00:00 | |
| I will have to look | 01/01/70 00:00 | |
| D87C51 | 01/01/70 00:00 | |
There may be a reason for this | 01/01/70 00:00 |