Features • Low Current Consumption • 2.25V to 2.75V Operation • Selectable Synchronous or Asynchronous Powerdown Mode • Selectable Dual Modulus Prescaler: LMX2430 RF: 8/9 or 16/17 LMX2433 RF: 8/9 or 16/17 LMX2434 RF: 16/17 or 32/33 LMX243x IF: 8/9 or 16/17 • Programmable Charge Pump Current Levels RF and IF: 1 or 4 mA • Fastlock™ Technology with Integrated Timeout Counters • Digital Filtered Lock Detect Output • Analog Lock Detect Output (supports both Push-Pull and Open Drain configurations) • 1.8V MICROWIRE Logic Interface • Available in 20-Pin TSSOP and 20-Pin UTCSP Description The LMX243x devices are high performance frequency synthesizers with integrated dual modulus prescalers. The LMX243x devices are designed for use as RF and IF local oscillators for dual conversion radio transceivers. A 32/33 or a 16/17 prescale ratio can be selected for the 5.0 GHz LMX2434 RF synthesizer. An 8/9 or a 16/17 prescale ratio can be selected for both the LMX2430 and LMX2433 RF synthesizers. The IF circuitry contains an 8/9 or a 16/17 prescaler. Using a proprietary digital phase locked loop technique, the LMX243x devices generate very stable, low noise control signals for RF and IF voltage controlled oscillators. Both the RF and IF synthesizers include a two-level programmable charge pump. Both the RF and IF synthesizers have dedicated Fastlock circuitry with integrated timeout counters. Furthermore, only a single word write is required to power up and tune the synthesizers to a new frequency. Serial data is transferred to the devices via a three-wire interface (DATA, LE, CLK). A low voltage logic interface allows direct connection to 1.8V devices. Supply voltages from 2.25V to 2.75V are supported . The LMX243x family features low current consumption: LMX2430 (3.0 GHz/ 0.8 GHz)-2.8 mA/ 1.4 mA, LMX2433 (3.6 GHz/ 1.7 GHz) -3.2 mA/ 2.0 mA, LMX2434 (5.0 GHz/ 2.5 GHz)-4.6 mA/ 2.4 mA at 2.50V. The LMX243x devices are available in 20-Pin TSSOP and 20-Pin UTCSP surface mount plastic packages. Applications • Mobile Handsets (GSM, GPRS, W-CDMA, CDMA, PCS, AMPS, PDC, DCS) • Cordless Handsets (DECT, DCT) • Wireless Data • Cable TV Tuners

LMX2485 WEBENCH® Design/Analyze/Build It RF-Side PLL Design Options Min Output Freq MHz >= 500 help Max Output Freq MHz <= 3600 help Channel Spacing KHz > 0 help AUX-Side PLL Design Options Min Output Freq MHz >= 100 help Max Output Freq MHz <= 1700 help Channel Spacing KHz > 0 help Global Design Options Crystal Frequency MHz > 0 help Max Supply V > 0 help What is WEBENCH®? Also Recommended LMX2434▲ Higher Maximum Operating Frequency MY BRIEFCASE                                       Click any "Briefcase" icon to add an item

	Block Diagram click for larger image
Typical Performance *click for larger image

Datasheet

Title		Size	Date	Other Language
	LMX2430/LMX2433/LMX2434 PLLatinum Dual High Frequency Synthesizer for RF Personal Communications LMX2430 3.0 GHz/0.8 GHz LMX2433 3.6 GHz/1.7 GHz LMX2434 5.0 GHz/2.5 GHz	943 Kbytes	28-May-03

Featured Application Notes

Title		Size	Date	Other Language
	AN-1879: Application Note 1879 Fractional N Frequency Synthesis	511 Kbytes	10-Dec-08

More Application Notes

Title		Size	Date	Other Language
	AN-1275: Application Note 1275 Optimizing LMX243x Input Sensitivity Using Simple Matching Techniques	178 Kbytes	2-Jun-03

Design Tools

Title	Size	Date
"LMX-Utility Evaluation Board: Add features and functionality to the standard evaluation boards, such as amplification, loop filter, and RF functions"
LMX2430/33/34 Evaluation Board Instructions	1015 Kbytes	14-Oct-2009

Reliability Metrics

Part Number	Process	EFR Reject	EFR Sample Size	PPM	LTA Rejects	LTA Device Hours	FITS	MTTF (Hours)
LMX2433SLEX	BICMOS8	2	14113	142	0	1677500	3	475995205
LMX2433TM	BICMOS8	2	14113	142	0	1677500	3	475995205
LMX2433TMX	BICMOS8	2	14113	142	0	1677500	3	475995205

Note: The Early Failure Rates (EFR) were calculated as point estimate PPM based on rejects and sample size for EFR. The Long Term Failure Rates were calculated at 60% confidence using the Arrhenius equation at 0.7eV activation energy and derating the assumed stress temperature of 150°C to an application temperature of 55°C.

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