| Manufacturer | Part # | Datasheet | Description |
 National Semiconductor ... | LM4980 |  1Mb/20P | 2 Cell Battery, 1mA, 42mW Per Channel High Fidelity Stereo Headphone Audio Amplifier for MP3 players |
| LM4980SD |  1Mb/20P | 2 Cell Battery, 1mA, 42mW Per Channel High Fidelity Stereo Headphone Audio Amplifier for MP3 players |
 National Semiconductor ... | LM4980SD |  1Mb/20P | 2 Cell Battery, 1mA, 42mW Per Channel High Fidelity Stereo Headphone Audio Amplifier for MP3 players |
| LM4981 |  1Mb/18P | Ground-Referenced, 80mW Stereo Headphone Amplifier with Digital Volume Control |
| LM4981SQ |  1Mb/18P | Ground-Referenced, 80mW Stereo Headphone Amplifier with Digital Volume Control |
| LM4982 |  1Mb/21P | Ground-Referenced, Ultra Low Noise, 80mW Stereo Headphone Amplifier with IntelliSense and I2C Volume |
| LM4982TL |  1Mb/21P | Ground-Referenced, Ultra Low Noise, 80mW Stereo Headphone Amplifier with IntelliSense and I2C Volume |
| LM4985 |  1Mb/29P | Stereo 135mW Low Noise Headphone Amplifier with Selectable Capacitively Coupled or Output Capacitor-less (OCL) Output and Digitally Controlled (I2C) V |
 National Semiconductor ... | LM4985TM |  1Mb/29P | Stereo 135mW Low Noise Headphone Amplifier with Selectable Capacitively Coupled or Output Capacitor-less (OCL) Output and Digitally Controlled (I2C) V |
 National Semiconductor ... | LM4900 |  772Kb/19P | 265mW at 3.3V Supply Audio Power Amplifier with Shutdown Mode |
| LM4900LD |  772Kb/19P | 265mW at 3.3V Supply Audio Power Amplifier with Shutdown Mode |
| LM4900M |  772Kb/19P | 265mW at 3.3V Supply Audio Power Amplifier with Shutdown Mode |
 National Semiconductor ... | LM4900MM |  772Kb/19P | 265mW at 3.3V Supply Audio Power Amplifier with Shutdown Mode |
| LM4901 |  1Mb/24P | 1.6 Watt Audio Power Amplifier with Selectable Shutdown Logic Level |
 National Semiconductor ... | LM4901IBL |  1Mb/24P | 1.6 Watt Audio Power Amplifier with Selectable Shutdown Logic Level |