| BU8871F | Tone Decoder, Generator, Detector |
| BU8872 | Tone Decoder, Generator, Detector |
| BU8872FS | Tone Decoder, Generator, Detector |
| BU8874 | Tone Decoder, Generator, Detector |
| BU8874F | Tone Decoder, Generator, Detector |
| BU8877 | Tone Decoder, Generator, Detector |
| BU8877F | Tone Decoder, Generator, Detector |