| Manufacturer | Part # | Datasheet | Description |
 National Semiconductor ... | LM4121 |  436Kb/16P | Precision Micropower Low Dropout Voltage Reference |
 National Semiconductor ... | LM4121AI-4.1 |  1Mb/41P | Self-Calibrating 12-Bit Plus Sign Serial I/O A/D Converters with MUX and Sample/Hold |
| LM4121AIM5-1.2 |  436Kb/16P | Precision Micropower Low Dropout Voltage Reference |
 National Semiconductor ... | LM4121AIM5-ADJ |  436Kb/16P | Precision Micropower Low Dropout Voltage Reference |
 National Semiconductor ... | LM4121AIM5X-1.2 |  436Kb/16P | Precision Micropower Low Dropout Voltage Reference |
| LM4121AIM5X-ADJ |  436Kb/16P | Precision Micropower Low Dropout Voltage Reference |
 National Semiconductor ... | LM4121IM5-1.2 |  436Kb/16P | Precision Micropower Low Dropout Voltage Reference |
 National Semiconductor ... | LM4121IM5-ADJ |  436Kb/16P | Precision Micropower Low Dropout Voltage Reference |