| Manufacturer | Part # | Datasheet | Description |
 National Semiconductor ... | LM331 |  280Kb/16P | Precision Voltage-to-Frequency Converters |
 National Semiconductor ... | LM3310 |  1Mb/26P | Step-Up PWM DC/DC Converter with Integrated Op-Amp and Gate Pulse Modulation Switch |
| LM3310 |  1Mb/25P | Step-up PWM DC/DC Converter with Integrated Op-Amp and Gate Pulse Modulation Switch |
| LM3310SQ |  1Mb/25P | Step-up PWM DC/DC Converter with Integrated Op-Amp and Gate Pulse Modulation Switch |
| LM3310SQ |  1Mb/26P | Step-Up PWM DC/DC Converter with Integrated Op-Amp and Gate Pulse Modulation Switch |