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Yamaha Datasheet Catalog
| Part Name | Manufacturer | Description |
| YTD428 | Yamaha | 5V DSU LSI for the ISDN terminal eguipment |
| YTD436 | Yamaha | ISDN BRI controller with S/T ref.pt. analog D/R |
| YTD439 | Yamaha | ISDN BRI controller for terminal eguipment with built-in DSU |
| YTZ420 | Yamaha | 3.0-5.0V; FCC fieldbus communication controller LSI |