| Manufacturer | Part # | Datasheet | Description |
 National Semiconductor ... | LM4925MM |  1Mb/15P | 2 Cell, Single Ended Output, 40mW Stereo Headphone Audio Amplifier |
 National Semiconductor ... | LM49250 |  1Mb/ 36P | Enhanced Emissions Suppression Stereo Class D Audio Sub-System with Ground Referenced Headphone Amplifier and Mono Earpiece |
| LM49250 |  1Mb/ 36P | Enhanced Emissions Suppression Stereo Class D Audio Sub-System with Ground Referenced Headphone Amplifier and Mono Earpiece |
| LM49250RL |  1Mb/ 36P | Enhanced Emissions Suppression Stereo Class D Audio Sub-System with Ground Referenced Headphone Amplifier and Mono Earpiece |
 National Semiconductor ... | LM49250 |  1Mb/ 36P | Enhanced Emissions Suppression Stereo Class D Audio Sub-System with Ground Referenced Headphone Amplifier and Mono Earpiece |
 National Semiconductor ... | LM4925SD |  1Mb/ 15P | 2 Cell, Single Ended Output, 40mW Stereo Headphone Audio Amplifier |
| LM4920 |  1Mb/ 17P | Ground-Referenced, Ultra Low Noise, Fixed Gain, 80mW Stereo Headphone Amplifier |
| LM49200 |  960Kb/ 26P | Stereo Class AB Audio Subsystem with a True Ground Headphone Amplifier |
 National Semiconductor ... | LM49200TL |  960Kb/ 26P | Stereo Class AB Audio Subsystem with a True Ground Headphone Amplifier |