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LMX2330L Datasheet(PDF) 1 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Part No. LMX2330L
Description  PLLatinum™ Low Power Dual Frequency Synthesizer for RF Personal Communications
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Maker  NSC [National Semiconductor (TI)]
Homepage  http://www.national.com

LMX2330L Datasheet(HTML) 1 Page - National Semiconductor (TI)

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PLLatinumLow Power Dual Frequency Synthesizer for
RF Personal Communications
2.5 GHz/510 MHz
2.0 GHz/510 MHz
1.2 GHz/510 MHz
General Description
The LMX233XL 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 0.5µ ABiC V silicon
BiCMOS process.
The LMX233XL contains dual modulus prescalers. A 64/65
or a 128/129 prescaler (32/33 or 64/65 in the 2.5 GHz
LMX2330L) can be selected for the RF synthesizer and a 8/9
or 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 to
generate very stable, low noise signals for RF and IF local
oscillators. Serial data is transferred into the LMX233XL via
a three wire interface (Data, Enable, Clock). Supply voltage
can range from 2.7V to 5.5V. The LMX233XL family features
very 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 CSP
24-pin surface mount plastic package.
n Ultra low current consumption
n 2.7V to 5.5V operation
n Selectable synchronous or asynchronous powerdown
CC = 1 µA typical at 3V
n Dual modulus prescaler:
(RF) 32/33 or 64/65
(RF) 64/65 or 128/129
(IF) 8/9 or 16/17
n Selectable charge pump TRI-STATE® mode
n Selectable charge pump current levels
n Selectable Fastlockmode
n Upgrade and compatible to LMX233XA family
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.
June 1999
© 1999 National Semiconductor Corporation

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