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LMX2346SLBX-LMX2347TM
2.0 GHz PLLatinum Frequency Synthesizer for RF Personal Communications
LMX2346/LMX2347
PLLatinum™ Frequency Synthesizer for RF Personal
Communications
LMX2346 2.0 GHz
LMX2347 2.5 GHz
General DescriptionThe LMX2346/7 are high performance frequency synthesiz-
ers withan integrated 32/33 dual modulus prescaler. The
LMX2346is designedfor RF operationupto2.0 GHz. The
LMX2347is designedforRF operationupto2.5 GHz. Using proprietary digital phase locked loop technique, the
LMX2346/7 generates very stable, low noise control signals
for UHF and VHF voltage controlled oscillators.
Serial datais transferred intothe LMX2346/7viaa three-line
MICROWIRE interface (DATA, LE, CLOCK). Supply voltage
rangeis from 2.7Vto 5.5V. The charge pump provides4 mA
output current.
The LMX2346/7 are manufactured using National’s 0.5µ
ABiCV silicon BiCMOS process andis availablein 16-pin
TSSOP and 16-pin CSP packages.
Features RF operationupto2.5 GHz 2.7Vto 5.5V operation Digital& Analog Lock Detect 32/33 Dual modulus prescaler Excellent Phase Noise Internal balanced, low leakage charge pump Pin Compatibleto LMX2323
Applications Cellular DCS/PCS/3G infrastructure equipment Wireless Local Area Networks (WLANs) Other wireless communication systems
Functional Block DiagramJune 2004
LMX2346/LMX2347
PLLatinum
Frequency
Synthesizer
for
Personal
Communications
