| Manufacturer | Part # | Datasheet | Description |
 National Semiconductor ... | LMP2231AMAE |  801Kb/ 20P | Micropower, 1.8V, Precision Operational Amplifier with CMOS Inputs |
| LMP2231AMAE |  802Kb/ 20P | Micropower, 1.6V, Precision Operational Amplifier with CMOS Inputs |
 National Semiconductor ... | LMP2231AMAX |  801Kb/ 20P | Micropower, 1.8V, Precision Operational Amplifier with CMOS Inputs |
| LMP2231AMAX |  802Kb/ 20P | Micropower, 1.6V, Precision Operational Amplifier with CMOS Inputs |
 National Semiconductor ... | LMP2231AMA |  801Kb/ 20P | Micropower, 1.8V, Precision Operational Amplifier with CMOS Inputs |
| LMP2231AMA |  802Kb/ 20P | Micropower, 1.6V, Precision Operational Amplifier with CMOS Inputs |
| LMP2231AMF |  801Kb/ 20P | Micropower, 1.8V, Precision Operational Amplifier with CMOS Inputs |
| LMP2231AMF |  802Kb/ 20P | Micropower, 1.6V, Precision Operational Amplifier with CMOS Inputs |
 National Semiconductor ... | LMP2231AMFE |  801Kb/ 20P | Micropower, 1.8V, Precision Operational Amplifier with CMOS Inputs |
| LMP2231AMFE |  802Kb/ 20P | Micropower, 1.6V, Precision Operational Amplifier with CMOS Inputs |