| Manufacturer | Part # | Datasheet | Description |
 National Semiconductor ... | LM4670 |  1Mb/18P | Filterless High Efficiency 3W Switching Audio Amplifier |
| LM4670 |  1Mb/20P | Filterless High Efficiency 3W Switching Audio Amplifier |
 National Semiconductor ... | LM4670ITL |  1Mb/18P | Filterless High Efficiency 3W Switching Audio Amplifier |
 National Semiconductor ... | LM4670ITLX |  1Mb/18P | Filterless High Efficiency 3W Switching Audio Amplifier |
 National Semiconductor ... | LM4670SD |  1Mb/18P | Filterless High Efficiency 3W Switching Audio Amplifier |
 National Semiconductor ... | LM4670 |  1Mb/20P | Filterless High Efficiency 3W Switching Audio Amplifier |