| Manufacturer | Part # | Datasheet | Description |
 National Semiconductor ... | LM3661 |  154Kb/6P | LM3361A Low Voltage/Power Narrow Band FM IF System |
| LM3661 |  841Kb/17P | 450mA Subminiature, Micropower Step-Down DC-DC Converter for Ultra Low-Voltage Circuits |
| LM3661AM |  154Kb/6P | LM3361A Low Voltage/Power Narrow Band FM IF System |
| LM3661TL-1.25 |  841Kb/17P | 450mA Subminiature, Micropower Step-Down DC-DC Converter for Ultra Low-Voltage Circuits |
| LM3661TL-1.35 |  841Kb/17P | 450mA Subminiature, Micropower Step-Down DC-DC Converter for Ultra Low-Voltage Circuits |
| LM3661TL-1.40 |  841Kb/17P | 450mA Subminiature, Micropower Step-Down DC-DC Converter for Ultra Low-Voltage Circuits |
| LM3661TLX-1.25 |  841Kb/17P | 450mA Subminiature, Micropower Step-Down DC-DC Converter for Ultra Low-Voltage Circuits |
| LM3661TLX-1.35 |  841Kb/17P | 450mA Subminiature, Micropower Step-Down DC-DC Converter for Ultra Low-Voltage Circuits |
| LM3661TLX-1.40 |  841Kb/17P | 450mA Subminiature, Micropower Step-Down DC-DC Converter for Ultra Low-Voltage Circuits |
| LM3661 |  841Kb/17P | 450mA Subminiature, Micropower Step-Down DC-DC Converter for Ultra Low-Voltage Circuits |