| 1218241 | MT8841 | Calling Number Identification Circuit | Zarlink Semiconductor |
| 1218242 | MT8841AE | CMOS Calling Number Identification Circuit | Mitel Semiconductor |
| 1218243 | MT8841AN | CMOS Calling Number Identification Circuit | Mitel Semiconductor |
| 1218244 | MT8841AS | CMOS Calling Number Identification Circuit | Mitel Semiconductor |
| 1218245 | MT8843 | Calling Number Identification Circuit 2 | Mitel Semiconductor |
| 1218246 | MT8843 | Calling Number Identification Circuit 2 | Zarlink Semiconductor |
| 1218247 | MT8843AE | CMOS Calling Number Identification Circuit 2 Preliminary Information | Mitel Semiconductor |
| 1218248 | MT8843AS | CMOS Calling Number Identification Circuit 2 Preliminary Information | Mitel Semiconductor |
| 1218249 | MT8860 | DTMF DECODER | Mitel Semiconductor |
| 1218250 | MT8860XC | DTMF DECODER | Mitel Semiconductor |
| 1218251 | MT8860XE | DTMF DECODER | Mitel Semiconductor |
| 1218252 | MT88634BT-2 | 0.3-6.0V; central office interface circuit. For PABX, key telephone systems, channel bank, voice mail | Mitel Semiconductor |
| 1218253 | MT88634BV-2 | 0.3-6.0V; central office interface circuit. For PABX, key telephone systems, channel bank, voice mail | Mitel Semiconductor |
| 1218254 | MT88634BV-4 | 0.3-6.0V; central office interface circuit. For PABX, key telephone systems, channel bank, voice mail | Mitel Semiconductor |
| 1218255 | MT8870 | ISO2-CMOS Integrated DTMF Receiver | Mitel Semiconductor |
| 1218256 | MT8870 | Integrated DTMF Receiver | Zarlink Semiconductor |
| 1218257 | MT8870D | Integrated DTMF Receiver | Mitel Semiconductor |
| 1218258 | MT8870D | Integrated DTMF Receiver with enhance sensitivity | Zarlink Semiconductor |
| 1218259 | MT8870D-1 | Integrated DTMF Receiver | Mitel Semiconductor |
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| 1218260 | MT8870DC | ISO2-CMOS Integrated DTMF Receiver | Mitel Semiconductor |
| 1218261 | MT8870DC-1 | ISO2-CMOS Integrated DTMF Receiver | Mitel Semiconductor |
| 1218262 | MT8870DC_DC-1 | 7V; 10mA; central office SLIC. For paging systems, repeater systems/mobile radio, credit card systems, remote control, personal computers, phone answering machine | Mitel Semiconductor |
| 1218263 | MT8870DE | ISO2-CMOS Integrated DTMF Receiver | Mitel Semiconductor |
| 1218264 | MT8870DE-1 | ISO2-CMOS Integrated DTMF Receiver | Mitel Semiconductor |
| 1218265 | MT8870DE_DE-1 | 7V; 10mA; central office SLIC. For paging systems, repeater systems/mobile radio, credit card systems, remote control, personal computers, phone answering machine | Mitel Semiconductor |
| 1218266 | MT8870DN | ISO2-CMOS Integrated DTMF Receiver | Mitel Semiconductor |
| 1218267 | MT8870DN-1 | ISO2-CMOS Integrated DTMF Receiver | Mitel Semiconductor |
| 1218268 | MT8870DN_DN-1 | 7V; 10mA; central office SLIC. For paging systems, repeater systems/mobile radio, credit card systems, remote control, personal computers, phone answering machine | Mitel Semiconductor |
| 1218269 | MT8870DS | ISO2-CMOS Integrated DTMF Receiver | Mitel Semiconductor |
| 1218270 | MT8870DS-1 | ISO2-CMOS Integrated DTMF Receiver | Mitel Semiconductor |
| 1218271 | MT8870DS_DS-1 | 7V; 10mA; central office SLIC. For paging systems, repeater systems/mobile radio, credit card systems, remote control, personal computers, phone answering machine | Mitel Semiconductor |
| 1218272 | MT8870DT | ISO2-CMOS Integrated DTMF Receiver | Mitel Semiconductor |
| 1218273 | MT8870DT-1 | ISO2-CMOS Integrated DTMF Receiver | Mitel Semiconductor |
| 1218274 | MT8870DT_DT-1 | 7V; 10mA; central office SLIC. For paging systems, repeater systems/mobile radio, credit card systems, remote control, personal computers, phone answering machine | Mitel Semiconductor |
| 1218275 | MT8880 | ISO2-CMOS Integrated DTMFTransceiver | Mitel Semiconductor |
| 1218276 | MT8880C | Integrated DTMFTransceiver | Mitel Semiconductor |
| 1218277 | MT8880C | Integrated DTMF Transceiver with Motorola compatible processor interface | Zarlink Semiconductor |
| 1218278 | MT8880C-1 | Integrated DTMFTransceiver | Mitel Semiconductor |
| 1218279 | MT8880CC | ISO2-CMOS Integrated DTMFTransceiver | Mitel Semiconductor |
| 1218280 | MT8880CC-1 | ISO2-CMOS Integrated DTMFTransceiver | Mitel Semiconductor |
