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LMX2330A Datasheet(PDF) 1 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Part No. LMX2330A
Description  PLLatinum??Dual Frequency Synthesizer for RF Personal Communications
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Manufacturer  NSC [National Semiconductor (TI)]
Direct Link  http://www.national.com
Logo NSC - National Semiconductor (TI)

LMX2330A Datasheet(HTML) 1 Page - National Semiconductor (TI)

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LMX2330A/LMX2331A/LMX2332A
PLLatinumDual Frequency Synthesizer for RF
Personal Communications
LMX2330A
2.5 GHz/510 MHz
LMX2331A
2.0 GHz/510 MHz
LMX2332A
1.2 GHz/510 MHz
General Description
The LMX233xA family of monolithic, integrated dual fre-
quency synthesizers, including prescalers, is to be used as a
local oscillator for RF and first IF of a dual conversion trans-
ceiver. It is fabricated using National’s ABiC IV silicon
BiCMOS process.
The LMX233xA contains dual modulus prescalers. A 64/65
or a 128/129 prescaler (32/33 or 64/65 in the 2.5 GHz
LMX2330A) can be selected for the RF synthesizer and a
8/9 or a 16/17 prescaler can be selected for the IF synthe-
sizer. LMX233XA, which employs a digital phase locked loop
technique, combined with a high quality reference oscillator
and loop filters, provides the tuning voltages for voltage con-
trolled oscillators to generate very stable low noise RF and
IF local oscillator signals. Serial data is transferred into the
LMX233xA via a three wire interface (Data, Enable, Clock).
Supply voltage can range from 2.7V to 5.5V. The LMX233xA
family
features
very
low
current
consumption;
LMX2330A — 13 mA at 3V, LMX2331A — 12 mA at 3V,
LMX2332A — 8 mA at 3V.
The LMX233xA are available in a TSSOP 20-pin surface
mount plastic package.
Features
n 2.7V to 5.5V operation
n Low current consumption
n Selectable powerdown mode: ICC = 1 µA typical at 3V
n Dual modulus prescaler:
LMX2330A (RF) 32/33 or 64/65
LMX2331A/32A (RF) 64/65 or 128/129
LMX2330A/31A/32A (IF) 8/9 or 16/17
n Selectable charge pump TRI-STATE® mode
n Selectable FastLockmode
n Small outline, plastic, surface mount TSSOP 0.173"
wide package
Applications
n Portable Wireless Communications (PCS/PCN, cordless)
n Cordless and cellular telephone systems
n Wireless Local Area Networks (WLANs)
n Cable TV tuners (CATV)
n Other wireless communication systems
Functional Block Diagram
TRI-STATE® is a registered trademark of National Semiconductor Corporation.
Fastlock, MICROWIREand PLLatinumare trademarks of National Semiconductor Corporation.
DS012331-1
May 1999
© 1999 National Semiconductor Corporation
DS012331
www.national.com


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