LMX2370TM

Clock Generators, PLLs, Frequency Synthesizers Overview

The LMX2370TM is a monolithic dual frequency synthesizer designed for RF personal communications. It operates on a single supply voltage ranging from 2.7V to 5.5V with typical current consumption of 6.0 mA at 3V. The device features two independent phase-locked loops: a Main PLL supporting input frequencies up to 2.5 GHz and an Auxiliary PLL supporting inputs up to 1.2 GHz. It includes selectable dual modulus prescalers (32/33 or 16/17 for Main; 16/17 or 8/9 for Aux) and a Microwire serial interface compatible with 1.8V logic. The component is available in a 24-pad PLGA package measuring 3.5 x 4.5 x 1.0 mm.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Dual frequency synthesizer architecture suitable for first and second local oscillator applications in dual mode transceivers
• Low voltage Microwire serial interface enabling programming compatibility with low voltage baseband processors
• Selectable charge pump current levels and FastLock mode for optimized loop stability and lock time
• Integrated dual modulus prescalers allowing flexible configuration for varying RF input frequency ranges

Clock Generators, PLLs, Frequency Synthesizers Applications

• Portable wireless communications systems including PCS, PCN, and cordless devices
• Dual mode cellular telephone systems
• Spread spectrum communication systems such as CDMA
• Cable TV tuners

Clock Generators, PLLs, Frequency Synthesizers Procurement Notes

Verify the specific suffix TM against the manufacturer's official documentation to confirm the exact package type and temperature rating. Ensure that the ordering information matches the required pinout configuration for the target PCB layout. Cross-reference the revision history to confirm compliance with current manufacturing standards.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this component when designing dual conversion transceivers requiring integrated dual synthesizers. Verify that the required VCO tuning range and reference oscillator frequencies fall within the specified operational limits. Confirm that the system power budget accommodates the typical current consumption and that the ESD protection requirements are met during handling.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This device belongs to the LMX237x family, which also includes the LMX2371 and LMX2372 variants. These components share the same core functionality and fabrication process but may differ in specific frequency coverage or prescaler configurations. They are fabricated using TI's 0.5u ABiCV silicon BiCMOS process technology.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

Publicly confirmed substitute part numbers are not identified in the provided documentation.