National LMX2354 Data Sheet
Summary
The LMX2354 is a highly integrated, low-noise fractional N/Integer N frequency synthesizer designed for advanced local oscillator subsystems in radio receivers. This chip provides stable signal generation across various wireless bands, making it essential for portable communications (e.g., PCS/CDMA), Cable TV Tuners, and dual-mode cellular systems. The manual details product features, including programmable charge pump levels and flexible operational modes, ensuring high performance reliability for system designers needing precise frequency control.
Manual Details
| Brand | National |
|---|---|
| Pages | 23 |
| File Size | 390.39 KB |
| Published | May 30, 2026 |
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Frequently Asked Questions
What voltage range can the LMX2354 operate within?
It operates on a supply voltage that can range from 2.7V to 5.5V.
How is programming data loaded into the device?
Data enters via the binary serial DATA pin and is loaded when the LOAD ENABLE (LE) signal goes high.
What packages are available for this synthesizer?
It is available in a 24-pin TSSOP surface mount plastic package and a 24-pin CSP container.
Where should bypass capacitors be placed for optimal RF performance?
Bypass capacitors must be placed as close as possible to the V_CC_RF pin and connected directly to the ground plane.