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| HM9270C | DTMF receiver | ELAN Microelectronics Corp. | DIP | 18 | -40°C | 85°C | HM9270C datasheet (66K) |
| HM9270D | DTMF receiver | ELAN Microelectronics Corp. | DIP | 18 | -40°C | 85°C | HM9270D datasheet (66K) |
| HM9270DM | DTMF receiver | ELAN Microelectronics Corp. | DIP | 20 | -40°C | 85°C | HM9270DM datasheet (66K) |