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Features
Ultra low current consumption
2.7V to 5.5V operation
Selectable synchronous and asynchronous powerdown mode:
ICC = 1 μA (typ)
Dual modulus prescaler: 64/65 or 128/129
Selectable charge pump TRI-STATE mode
Selectable charge pump current levels
Selectable Fastlock
™ mode
Upgrade and compatible to LMX2335/36
Small-outline, plastic, surface mount TSSOP package
LMX2336 available in CSP package
Description The LMX2335L and LMX2336L are monolithic, integrated dual frequency synthesizers, including two high frequency prescalers,
and are designed for applications requiring two RF phase-lock loops. They are fabricated using National's 0.5μ ABiC V silicon
BiCMOS process.
The LMX2335L/36L contains two dual modulus prescalers. A 64/65 or a 128/129 prescaler can be selected for each RF synthesizer.
A second reference divider chain is included in the IC for improved system noise. The LMX2335L/36L combined with a high quality
reference oscillator, two loop filters, and two external voltage controlled oscillators generates very stable low noise RF
local oscillator signals.
Serial data is transferred into the LMX2335L/36L via a three wire interface (Data, Enable, Clock). Supply voltage can range
from 2.7V to 5.5V. The LMX2335L/36L feature very low current consumption; LMX2335L 4.0 mA at 5V, LMX2336L 5.5 mA at 5V. The
LMX2335L is available in SO, TSSOP and CSP 16-pin surface mount plastic packages. The LMX2336L is available in a TSSOP 20-pin
and CSP 24-pin surface mount plastic package.
Applications
Cellular telephone systems (AMPS, ETACS, RCR-27)
Cordless telephone systems
(DECT, ISM , PHS, CT-1+)
Personal Communication Systems
(DCS-1800, PCN-1900)
Dual Mode PCS phones
Cable TV Tuners (CATV)
Other wireless communication systems
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Also Recommended
| LMX2430 | Significant Reduction In Spurs, Phase Noise, & Power Consumption |
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