| Product | Package | Description | VIN | Datasheet |
| XD567 | DIP-8 | Tone decoder | 4.75-9V | |
| XL33290 | SOP-8 | ISO K Line Serial Link Interface | 8-18V | |
| XL9170 | SOP18 | Dual Tone Multi Frequency(DTMF) receivers | 2.5-5.5V | |
| XD9170 | DIP-18 | Dual Tone Multi Frequency(DTMF) receivers | 2.5-5.5V | |