The LMX2335/LMX2336/LMX2337 are integrated dual frequency synthesizers from National, including two high-frequency prescalers, designed for applications requiring two RF phase-locked loops.
The LMX2335, LMX2336, and LMX2337 are monolithic integrated dual frequency synthesizers designed for applications requiring two RF phase-lock loops. They utilize a digital phase-locked loop technique combined with a high-quality reference oscillator and loop filters to generate stable low noise RF local oscillator signals. The devices employ a three-wire serial interface (Data, Enable, Clock) for data transfer.
| Supply Voltage Range | 2.7V to 5.5V |
|---|---|
| Powerdown Current (Typ) | 1 µA |
| Operating Temperature | -40°C to +85°C |
| RF1 Operating Frequency (LMX2335) | 0.100 GHz to 1.1 GHz |
| RF1 Operating Frequency (LMX2336) | 0.200 GHz to 2.0 GHz |
| RF1 Operating Frequency (LMX2337) | 100 MHz to 550 MHz |
| Oscillator Frequency (No Load) | 5 MHz to 40 MHz |
| Charge Pump Output Current (Source) | -5.0 mA |
The supply voltage can range from 2.7V to 5.5V.
The LMX2336 is available in a 20-pin surface mount plastic package.
They are designed for cellular telephone systems, cordless telephone systems, and personal communication systems.