| Manufacturer | Part # | Datasheet | Description |
 National Semiconductor ... | LPC661IM |  311Kb/ 13P | Low Power CMOS Operational Amplifier |
 National Semiconductor ... | LPC661IN |  311Kb/ 13P | Low Power CMOS Operational Amplifier |
 National Semiconductor ... | LPC661AIM |  311Kb/ 13P | Low Power CMOS Operational Amplifier |
 National Semiconductor ... | LPC661AIN |  311Kb/ 13P | Low Power CMOS Operational Amplifier |
 National Semiconductor ... | LPC661AMN |  311Kb/ 13P | Low Power CMOS Operational Amplifier |
| LPC661 |  363Kb/ 17P | Low Power CMOS Operational Amplifier |
| LPC660 |  603Kb/ 17P | Low Power CMOS Quad Operational Amplifier |
 National Semiconductor ... | LPC660AIM |  603Kb/ 17P | Low Power CMOS Quad Operational Amplifier |