| Manufacturer | Part # | Datasheet | Description |
 National Semiconductor ... | LF401 |  360Kb/9P | PRECISION FAST SETTLING JFET INPUT OPERATIONAL AMPLIFIER |
| LF401A |  360Kb/9P | PRECISION FAST SETTLING JFET INPUT OPERATIONAL AMPLIFIER |
| LF401ACD |  360Kb/9P | PRECISION FAST SETTLING JFET INPUT OPERATIONAL AMPLIFIER |
| LF401CD |  360Kb/9P | PRECISION FAST SETTLING JFET INPUT OPERATIONAL AMPLIFIER |
 National Semiconductor ... | LF400 |  218Kb/ 12P | Fast-Settling JFET-Input Operational Amplifier |
 National Semiconductor ... | LF400A |  218Kb/ 12P | Fast-Settling JFET-Input Operational Amplifier |
| LF400ACH |  218Kb/ 12P | Fast-Settling JFET-Input Operational Amplifier |
| LF400AMH |  218Kb/ 12P | Fast-Settling JFET-Input Operational Amplifier |
| LF400CH |  218Kb/ 12P | Fast-Settling JFET-Input Operational Amplifier |
| LF400MH |  218Kb/ 12P | Fast-Settling JFET-Input Operational Amplifier |
| LF401A |  360Kb/ 9P | PRECISION FAST SETTLING JFET INPUT OPERATIONAL AMPLIFIER |
| LF401ACD |  360Kb/ 9P | PRECISION FAST SETTLING JFET INPUT OPERATIONAL AMPLIFIER |
| LF401CD |  360Kb/ 9P | PRECISION FAST SETTLING JFET INPUT OPERATIONAL AMPLIFIER |