LMX2330L

The LMX2330L family of monolithic, integrated dual fre-quency synthesizers, including prescalers, is to be used as alocal oscillator for RF and first IF of a dual conversion trans-ceiver. It is fabricated using National's 0.5µ ABiC V siliconBiCMOS process.

The LMX2330L contains dual modulus prescalers. A 64/65or a 128/129 prescaler (32/33 or 64/65 in the 2.5 GHzLMX2330L) can be selected for the RF synthesizer and a 8/9or a 16/17 prescaler can be selected for the IF synthesizer.LMX233XL, which employs a digital phase locked loop tech-nique, combined with a high quality reference oscillator, pro-vides the tuning voltages for voltage controlled oscillators togenerate very stable, low noise signals for RF and IF localoscillators. Serial data is transferred into the LMX233XL viaa three wire interface (Data, Enable, Clock). Supply voltagecan range from 2.7V to 5.5V. The LMX233XL family featuresvery low current consumption;LMX2330L-5.0 mA at 3V, LMX2331L-4.0 mA at 3V,LMX2332L-3.0 mA at 3V.

The LMX233XL are available in a TSSOP 20-pin and CSP24-pin surface mount plastic package.