LMX1501AMX

Clock Generators, PLLs, Frequency Synthesizers Overview

The LMX1501AMX is a PLLatinum frequency synthesizer designed for RF personal communications, operating up to 1.1 GHz. It utilizes a dual modulus prescaler with selectable divide ratios of 64/65 or 128/129 and features an internal balanced charge pump. The device supports a supply voltage range from 2.7V to 5.5V with typical current consumption of 6 mA at 3V. Configuration is managed via a three-line MICROWIRE serial interface. It is housed in a JEDEC 16-lead surface mount plastic package.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Integrated dual modulus prescaler supporting high-frequency RF operation
• Internal balanced low leakage charge pump for stable phase locking
• Three-line MICROWIRE serial interface for digital configuration
• Lock detect output indicating VCO synchronization status

Clock Generators, PLLs, Frequency Synthesizers Applications

• Cellular telephone systems including AMPS, NMT, and ETACS
• Portable wireless communications such as PCS and cordless devices
• Advanced cordless telephone systems like CT-1 and ISM902-928

Clock Generators, PLLs, Frequency Synthesizers Procurement Notes

Verify component authenticity through authorized channels due to obsolete status. Confirm package integrity and pin alignment against the JEDEC 16-lead specification. Review datasheet revisions for any historical electrical characteristic updates prior to integration into final designs.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this component for applications requiring integrated frequency synthesis up to 1.1 GHz with low power consumption. Ensure the system design accommodates the specific serial data timing requirements and provides adequate bypassing near the VCC and VP pins for optimal noise performance.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This part belongs to the National Semiconductor PLLatinum family, now under Texas Instruments. It serves as a specialized radio frequency synthesizer intended for legacy mobile communication standards. The device integrates reference dividers and programmable counters to generate precise local oscillator signals.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

Public confirmed substitute part numbers are not available.