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Texas Instruments LMX2531LQ1515E/NOPB — Analog & Data Acquisition

LMX2531LQ1515E/NOPB PLL Frequency Synthesizer, 1.58 GHz

MPNLMX2531LQ1515E/NOPB
End of Life

Texas Instruments LMX2531LQ1515E/NOPB, PLL Frequency Synthesizer (RF), 1.58 GHz max, CMOS output, 2.8V–3.2V supply, -40°C to 85°C, 36-WFQFN Exposed Pad, Surface Mount.

$7.53Ref. price · indicative, final on quote
Texas Instruments LMX2531LQ1515E/NOPB datasheet (PDF)
Packaging36-WFQFN Exposed Pad
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

LMX2531LQ1515E/NOPB specifications
ParameterValue
TypeFrequency Synthesizer (RF)
MountingSurface Mount
Supply voltage2.8V ~ 3.2V
Frequency - max1.58GHz
Operating temperature-40°C ~ 85°C
PLLYes
InputClock
OutputCMOS
PackageBulk
Case36-WFQFN Exposed Pad
Divider (Multiplier)Yes/No
Number of circuits1
Ratio - Input:Output2:2
Differential - Input:OutputNo/No

Product details

1.58 GHz PLL frequency synthesizer for RF local-oscillator chains

The Texas Instruments LMX2531LQ1515E/NOPB is a high-performance PLL-based frequency synthesizer designed for RF applications. It accepts a clock input and delivers a CMOS output up to 1.58 GHz, making it a fit for local-oscillator generation in wireless infrastructure, test equipment, and satellite downconverters. The part integrates the PLL function (Yes) in a single 1-circuit device with a 2:2 input-to-output ratio, and operates from a 2.8V to 3.2V supply rail over the industrial temperature range of -40°C to 85°C.

The 2.8V to 3.2V supply window is tighter than a typical 3.3V ±10% rail. If your board runs a 3.3V bus, you need a local LDO or a low-dropout regulator set to 3.0V to stay inside the operating range.

Package and footprint — 36-WQFN with exposed pad

Frequently asked questions

What is the frequency range of LMX2531LQ1515E/NOPB?

The maximum output frequency is 1.58 GHz. The part is a PLL frequency synthesizer with a clock input and CMOS output; the divider/multiplier is Yes/No, so frequency multiplication is not supported internally.

Is LMX2531LQ1515E/NOPB compatible with 3.3V logic?

The supply voltage range is 2.8V to 3.2V. A 3.3V rail exceeds the maximum rating; a regulator to 3.0V is required. The CMOS output is compatible with 3.3V logic families when the supply is within range.

What are the alternatives to LMX2531LQ1515E/NOPB?

The CD74HCT7046AE is a PLL from a different series (74HCT) with a 38 MHz maximum frequency, through-hole package, and -55°C to 125°C range. It is not a functional replacement for a 1.58 GHz RF synthesizer — the LMX2531LQ1515E/NOPB operates in a different performance class and application space.