Difference between revisions of "DEC part number"
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| − | '''DEC part numbers''' are generally of the form 'ww-xxxxx-yy zzzz' (sometimes the first hyphen is omitted). [[Digital Equipment Corporation|DEC]] had a system for their part numbers, such that looking at a part number will generally tell you (based on the leading two-digit field, the 'class code') what ''kind'' of part it is: [[integrated circuit|chip]], cable, etc. The next field is a 'basic identifier', then comes a 'variation identifier'; the final, optional, field is the 'revision identifier'. . | + | '''DEC part numbers''' are generally of the form 'ww-xxxxx-yy zzzz' (sometimes the first hyphen is omitted). [[Digital Equipment Corporation|DEC]] had a system for their part numbers, such that looking at a part number will generally tell you (based on the leading two-digit field, the 'class code') what ''kind'' of part it is: [[integrated circuit|chip]], cable, etc. The next field is a 'basic identifier', then comes a 'variation identifier'; the final, optional, field is the 'revision identifier'. |
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| + | It should be noted that DEC had several other [[namespace]]s for things produced by the company (such as [[DEC engineering drawing numbers]]; and the identification numbers of [[FLIP CHIP]]s and later component [[printed circuit board|PCBs]], of the form 'Xyyyy', where 'X' is a capital letter, and 'yyyy' are digits), but these numbers are ''not'' 'DEC part numbers', as defined by the applicable DEC specifications (below). | ||
This table lists the major class codes: | This table lists the major class codes: | ||
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| 19 || [[Bipolar]] [[integrated circuit]]s | | 19 || [[Bipolar]] [[integrated circuit]]s | ||
|- | |- | ||
| − | | 21 || [[Metal Oxide Semiconductor|MOS]] chips ([[Central Processing Unit|CPUs]], etc | + | | 21 || [[Metal Oxide Semiconductor|MOS]] chips ([[Central Processing Unit|CPUs]], etc) |
|- | |- | ||
| 23 || Fixed memory chips ([[Read-only memory|ROMs]], etc) | | 23 || Fixed memory chips ([[Read-only memory|ROMs]], etc) | ||
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| 54 || Assemblies (circuit cards, [[DEC indicator panel|display panels]], etc) | | 54 || Assemblies (circuit cards, [[DEC indicator panel|display panels]], etc) | ||
|- | |- | ||
| − | | 70 || Cables/[[harness]]es | + | | 70 || Cables/[[harness]]es/[[backplane]]s |
|- | |- | ||
| 74 || 'Manufactured non-electrical parts' (includes decals, etc) | | 74 || 'Manufactured non-electrical parts' (includes decals, etc) | ||
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| − | ==See also== | + | <!-- ==See also== |
| − | + | --> | |
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==External links== | ==External links== | ||
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* [https://how-to.fandom.com/wiki/How_to_identify_computer_chips_or_integrated_circuits_on_circuit_boards How to identify computer chips or integrated circuits on circuit boards] | * [https://how-to.fandom.com/wiki/How_to_identify_computer_chips_or_integrated_circuits_on_circuit_boards How to identify computer chips or integrated circuits on circuit boards] | ||
| − | [[Category: DEC | + | [[Category: Digital Equipment Corporation]] |
| + | [[Category:DEC Naming/Numbering Schemes]] | ||
Latest revision as of 20:30, 1 October 2024
DEC part numbers are generally of the form 'ww-xxxxx-yy zzzz' (sometimes the first hyphen is omitted). DEC had a system for their part numbers, such that looking at a part number will generally tell you (based on the leading two-digit field, the 'class code') what kind of part it is: chip, cable, etc. The next field is a 'basic identifier', then comes a 'variation identifier'; the final, optional, field is the 'revision identifier'.
It should be noted that DEC had several other namespaces for things produced by the company (such as DEC engineering drawing numbers; and the identification numbers of FLIP CHIPs and later component PCBs, of the form 'Xyyyy', where 'X' is a capital letter, and 'yyyy' are digits), but these numbers are not 'DEC part numbers', as defined by the applicable DEC specifications (below).
This table lists the major class codes:
| Class | Type |
|---|---|
| 10 | Capacitors |
| 11 | Diodes |
| 12 | Mechanical and electro-mechanical items (connectors, pins, bearings, belts, fans, etc) |
| 13 | Resistors |
| 15 | Transistors |
| 16 | Transformers and inductors |
| 17 | Wire and fiber optic cables |
| 18 | Crystals and other oscillators |
| 19 | Bipolar integrated circuits |
| 21 | MOS chips (CPUs, etc) |
| 23 | Fixed memory chips (ROMs, etc) |
| 24 | Fiber-optic components |
| 30 | Core memory stacks, major components |
| 36 | Paper tape, punched cards, labels |
| 50 | Printed circuit boards |
| 52 | Pulse transformers |
| 54 | Assemblies (circuit cards, display panels, etc) |
| 70 | Cables/harnesses/backplanes |
| 74 | 'Manufactured non-electrical parts' (includes decals, etc) |
| 90 | Fastener hardware (nuts, bolts, screws, washers, ties etc) |
| 91 | Hook up wire and tubing |
