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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