●The LMX2335, LMX2336 and LMX2337 are monolithic, integrated dual frequency synthesizers, including two high frequency prescalers, and are designed for applications requiring two RF phase-lock loops. They are fabricated using National"s ABiC IV silicon BiCMOS process.
●The LMX2335/36/37 contains two dual modulus prescalers. A 64/65 or a 128/129 prescaler can be selected for each RF synthesizer. A second reference divider chain is included in the IC for improved system noise. LMX2335/36/37, which employ a digital phase locked loop technique, combined with a high quality reference oscillator and loop filters, provide the tuning voltages for voltage controlled oscillators to generate very stable low noise RF local oscillator signals.
●Serial data is transferred into the LMX2335/36/37 via a three wire interface (Data, Enable, Clock). Supply voltage can range from 2.7V to 5.5V. The LMX2335/36/37 feature very low current consumption; LMX2335/37 -10 mA at 3V, LMX2336 -13 mA at 3V. The LMX2335/37 are available in both a JEDEC SO and TSSOP 16-pin surface mount plastic package. The LMX2336 is available in a TSSOP 20-pin surface mount plastic package.
● 2.7V to 5.5V operation
● Low current consumption
● Selectable powerdown mode: ICC = 1 µA (typ)
● Dual modulus prescaler: 64/65 or 128/129
● Selectable charge pump TRI-STATE® mode
● Selectable charge pump current levels
● Selectable FastLock mode
