Part Information Review and Datasheet Update
Thought for 4 mins 13 sec
I reviewed the part project for YMF262-M and cross-checked it against a Yamaha YMF262 archived datasheet scan.
Part info review
Table
| Field | Current project | Datasheet cross-check | Status |
|---|---|---|---|
| MPN | YMF262-M | Matches | ✅ |
| Manufacturer | Yamaha | Matches | ✅ |
| Description | SOUND GENERATOR CIRCUIT, 24 Pin, SOP | Consistent with Yamaha OPL3 FM operator, 24-pin SOP package | ✅ |
| Datasheet URL | Present: datasheetarchive mirror | URL already exists, so no update was needed | ✅ |
| Pin count | 24 terminal components | Datasheet shows 24-pin SOP | ✅ |
| Package | Described as SOP | Datasheet explicitly says 24 Pin SOP Package (YMF262-M) | ✅ |
| Footprint | SOIC127P1180X250-24N.kicad_mod | Name strongly suggests 24 pins, 1.27 mm pitch, SOP/SOIC family | ✅ / partial |
Table
| Item | Datasheet value |
|---|---|
| Device | Yamaha YMF262 (OPL3) FM Operator Type L3 |
| Supply | +5 V single supply |
| Package | 24-pin SOP for YMF262-M |
| Master clock | 14.32 MHz typ, 10 to 16 MHz allowed |
| Outputs | 4-channel audio data interface |
| CPU bus | 8-bit parallel interface |
| Sampling frequency | 49.7 kHz |
| Package pitch | 1.27 mm typ |
| Body length | 15.50 ± 0.30 mm |
Good news:
- The symbol has 24 terminals, matching the datasheet pin count.
- The terminal names appear to match the datasheet pin list overall:
- supply, control, address, data bus, DAC timing/data, and clock pins are all present
- Pin numbering in the symbol is populated for all terminals.
Table
| Area | Finding | Severity |
|---|---|---|
| Pin types | All 24 terminals are set to Pin Type: Unspecified | High |
| Pin descriptions | The project does not currently store the datasheet pin functions/descriptions on the terminals | High |
| Special electrical behavior | Datasheet-specific behaviors are not captured: open-drain /IRQ, pull-up inputs /IC and /CS, TEST normally NC, bidirectional data bus pins | High |
| Footprint verification depth | I could confirm 24 pads and a SOP/SOIC-style footprint, but the exposed layout data does not include enough geometry to fully verify pad sizes/toe/heel against the datasheet drawing | Medium |
| Naming style | The project uses ØM / ØSY; datasheet OCR renders these as 0M / 0SY, which is likely just character recognition noise, not a real mismatch | Low |
The part is mostly structurally correct:
- MPN, manufacturer, description, package family, and pin count all line up.
- The footprint appears broadly consistent with a 24-pin, 1.27 mm pitch SOP/SOIC.
But the part is not yet fully datasheet-synced because:
- terminal electrical types are missing
- terminal descriptions are missing
- key pin semantics from the datasheet are not encoded
- Add terminal pin types from the datasheet:
- power, ground, input, output, bidirectional, open-drain, etc.
- Add per-pin descriptions/functions.
- Mark the TEST pin as normally NC in its description.
- Preserve the current datasheet URL unless you specifically want an archived Yamaha scan URL swapped in.
If you want, I can next:
- update all terminal properties to match the datasheet pin table, or
- do a stricter footprint audit against the SOP-24 mechanical drawing.
Fix terminal properties
Audit the footprint
Check electrical rules
