LMX2323 Datasheet, PDF (1/12 Pages) National Semiconductor (TI) – PLLatinum 2.0 GHz Frequency Synthesizer for RF Personal Communications

October 2000
LMX2323
PLLatinum^™ 2.0 GHz Frequency Synthesizer for RF
Personal Communications
General Description
The LMX2323 is a high performance frequency synthesizer
with integrated 32/33 dual modulus prescaler designed for
RF operation up to 2.0 GHz. Using a proprietary digital
phase locked loop technique, the LMX2323’s linear phase
detector characteristics can generate very stable, low noise
control signals for UHF and VHF voltage controlled oscilla-
tors.
Serial data is transferred into the LMX2323 via a three-line
MICROWIRE™ interface (Data, LE, Clock). Supply voltage
range is from 2.7V to 5.5V. The LMX2323 features very low
curent consumption, typically 3.5mA at 3V. The charge pump
provides 4 mA output current.
The LMX2323 is manufactured using National’s ABiC V
BiCMOS process and is packaged in a 16-pin TSSOP.
Features
n RF operation up to 2.0 GHz
n 2.7V to 5.5V operation
n Low current consumption: Icc = 3.5mA (typ) at
Vcc=3.0V
n Digital Lock Detect
n Dual modulus prescaler: 32/33
n Internal balanced, low leakage charge pump
Applications
n Cellular telephone systems (GSM, NADC, CDMA, PDC,
PHS)
n Personal wireless communications (DCS-1800, DECT,
CT-1+)
n Wireless local area networks (WLANs)
n DCS/PCS infrastructure equipment
n Other wireless communication systems
Functional Block Diagram
TRI-STATE^® is a registered trademark of National Semiconductor Corporation.
MICROWIRE™ and PLLatinum™ are trademarks of National Semiconductor Corporation.
© 2000 National Semiconductor Corporation DS101362
DS101362-1
www.national.com