LMX2312U  Product Folder

The LMX2310/1/2/3U are high performance frequency synthesizers. The LMX2310/1/2U use a selectable, dual modulus 32/33 and 16/17 prescaler. The LMX2313U uses a selectable, dual modulus 16/17 and 8/9 prescaler. The device, when combined with a high quality reference oscillator and a voltage controlled oscillator, generates very stable, low noise local oscillator signals for up and down conversion in wireless communication devices.

Serial data is transferred into LMX2310/1/2/3U via a three-wire interface (Data, Enable, Clock) that can be directly interfaced with low voltage baseband processors. Supply voltage can range from 2.7V to 5.5V. LMX2310U features very low current consumption, typically 2.3 mA at 3.0V.

The LMX2310/1/2/3U are manufactured using National's 0.5µ ABiC V silicon BiCMOS process and is available in 20-pin CSP packages.

• RF operation up to 2.5 GHz
• 2.7V to 5.5V operation
• Ultra Low Current Consumption
• Low prescaler values LMX2310/1/2U 32/33 or 16/17 LMX2313U 16/17 or 8/9
• Excellent Phase Noise
• Internal balanced, low leakage charge pump
• Selectable Charge Pump Current Levels
• Selectable Fastlock mode with Time-Out Counter
• Low Voltage MICROWIRE interface (1.72V to V_CC)
• Digital and Analog Lock Detect
• Small 20-pad Thin Chip Scale Package

• Cellular DCS, PCS, WCDMA telephone systems
• Wireless Local Area Networks (WLAN)
• Global Positioning Systems (GPS)
• Other wireless communications systems