| Manufacturer | Part # | Datasheet | Description |
 National Semiconductor ... | LM4549AVH |  528Kb/28P | AC ??7 Rev 2.1 Codec with Sample Rate Conversion and National 3D Sound |
 National Semiconductor ... | LM4549A |  528Kb/28P | AC ??7 Rev 2.1 Codec with Sample Rate Conversion and National 3D Sound |
 National Semiconductor ... | LM4549B |  933Kb/28P | AC ??7 Rev 2.1 Multi-Channel Audio Codec with Sample Rate Conversion and National 3D Sound |
 National Semiconductor ... | LM4549VH |  324Kb/18P | AC ??7 Rev 2.1 Codec with Sample Rate Conversion and National 3D Sound |
| LM4540 |  298Kb/16P | AC ??7 Codec with National 3D Sound |
| LM4540VH |  298Kb/16P | AC ??7 Codec with National 3D Sound |
| LM4543 |  304Kb/16P | AC ??7 Codec with National 3D Sound |
| LM4543VH |  304Kb/16P | AC ??7 Codec with National 3D Sound |
| LM4545 |  327Kb/16P | AC ??7 Codec with Stereo Headphone Amplifier and National 3D Sound |
| LM4545VH |  327Kb/16P | AC ??7 Codec with Stereo Headphone Amplifier and National 3D Sound |
| LM4546 |  308Kb/18P | AC ??7 Rev 2 Codec with Sample Rate Conversion and National 3D Sound |