| Manufacturer | Part # | Datasheet | Description |
 National Semiconductor ... | LM4912MM |  699Kb/14P | Stereo 40mW Low Noise Headphone Amplifier |
 National Semiconductor ... | LM49120 |  721Kb/ 28P | Audio Sub-System with Mono Class AB Loudspeaker Amplifier and Stereo OCL/SE Headphone Amplifier |
 National Semiconductor ... | LM49120TL |  721Kb/ 28P | Audio Sub-System with Mono Class AB Loudspeaker Amplifier and Stereo OCL/SE Headphone Amplifier |
 National Semiconductor ... | LM49120TLX |  721Kb/ 28P | Audio Sub-System with Mono Class AB Loudspeaker Amplifier and Stereo OCL/SE Headphone Amplifier |
 National Semiconductor ... | LM4910 |  828Kb/ 22P | Output Capacitor-less Stereo 35mW Headphone Amplifier |
 National Semiconductor ... | LM49100 |  2Mb/ 24P | Mono Class AB Audio Subsystem with a True-Ground Headphone Amplifier |
| LM49100 |  2Mb/ 26P | Mono Class AB Audio Sub-System with a True-Ground Headphone Amplifier |
 National Semiconductor ... | LM49100_0709 |  2Mb/ 26P | Mono Class AB Audio Sub-System with a True-Ground Headphone Amplifier |