Want to post a buying lead? If you are not a member yet, please select the specific/related part number first and then fill the quantity and your contact details in the "Request for Quotation Form" on the left, and then click "Send RFQ".Your buying lead can then be posted, and the reliable suppliers will quote via our online message system or other channels soon.
The LMX233XL 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 LMX233XL 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.
LMX2331L Maximum Ratings
Power Supply Voltage VCC −0.3V to +6.5V VP −0.3V to +6.5V Voltage on Any Pin with GND = 0V (VI) −0.3V to VCC+0.3V Storage Temperature Range (TS) −65˚C to +150˚C Lead Temperature (solder 4 sec.) (TL) +260˚C
LMX2331L Features
Ultra low current consumption 2.7V to 5.5V operation Selectable synchronous or asynchronous powerdownmode:ICC = 1 µA typical at 3V Dual modulus prescaler:LMX2330L (RF) 32/33 or 64/65LMX2331L/32L (RF) 64/65 or 128/129LMX2330L/31L/32L (IF) 8/9 or 16/17 Selectable charge pump TRI-STATE® mode Selectable charge pump current levels Selectable Fastlock™ mode Upgrade and compatible to LMX233XA family
LMX2331L Typical Application
Portable Wireless Communications(PCS/PCN, cordless) Cordless and cellular telephone systems Wireless Local Area Networks (WLANs) Cable TV tuners (CATV) Other wireless communication systems