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Home > Products > Crystals, Oscillators, Resonators > Oscillators

Texas Instruments LMK62A2-266M66SIAT

Name: LMK62A2-266M66SIAT
Brand: Texas Instruments
SKU: LMK62A2-266M66SIAT
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: LMK62A2-266M66SIAT

Manufacturer:: Texas Instruments

Category:: Oscillators

Package:: 6-SMD Module

Datasheet:: LMK62A2-266M66SIAT.pdf

Description:: SILICONE OSC XO 266.6600MHZ LVDS

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Product details

Overview

LMK62A2-266M66SIAT from Texas Instruments is a factory-programmed, low-jitter LVDS oscillator delivering 266.66 MHz output with ±50 ppm total frequency tolerance, 150 fs RMS phase jitter (12 kHz–20 MHz), and robust –60 dBc PSRR at 3.3 V supply. It serves as a high-stability clock reference in FPGA and processor clocking systems requiring precise timing integrity.

For engineers reviewing the LMK62A2-266M66SIAT datasheet, LMK62A2-266M66SIAT pinout, LMK62A2-266M66SIAT application, or LMK62A2-266M66SIAT equivalent, key selection criteria include its 266.66 MHz LVDS output, 6-pin QFM (SIA) package compatibility with industry-standard 5032 footprints, industrial temperature range (–40°C to +85°C), and OE-controlled output enable/disable functionality.

Technical Context

The LMK62A2-266M66SIAT integrates a high-performance PLL-based oscillator core with internal power conditioning for enhanced supply noise rejection. Its LVDS output stage is optimized for 266.66 MHz operation with 300–480 mV differential swing and 45–55% duty cycle, meeting JEDEC-compliant LVDS signaling requirements.

It operates from a single 3.3 V ±5% supply, draws ≤100 mA typical current, and features an active-low OE input with internal pulldown and 10 kΩ recommended external pullup. Startup time is 10 ms from VDD ramp to output enable, and output disable/enable transitions occur within 50 µs.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Frequency	266.66 MHz - precisely factory-programmed for high-speed serial link reference clocks (e.g., PCIe Gen3, DDR4 PHY).
Output Format	LVDS - differential signaling with 300–480 mV swing, compatible with standard LVDS receivers and PCB trace routing practices.
Total Frequency Tolerance	±50 ppm - includes initial calibration, temperature drift (–40°C to +85°C), supply variation, solder reflow shift, and 5-year aging at 40°C.
RMS Phase Jitter (12 kHz–20 MHz)	150 fs typical - enables low-bit-error-rate operation in high-speed SerDes and ADC/DAC sampling clocks.
PSRR	–60 dBc at 50 kHz–1 MHz ripple - reduces need for ultra-low-noise LDOs and simplifies power delivery network design.
Supply Voltage	3.3 V ±5% - aligns with standard I/O voltage rails in modern digital systems without level-shifting circuitry.
Operating Temperature	–40°C to +85°C - qualified for industrial and telecom infrastructure environments including baseband units and network line cards.

Pinout & Package

LMK62A2-266M66SIAT uses a 5.00 mm × 3.20 mm, 6-pin Quad Flat Module (QFM) package designated SIA - pin-compatible with industry-standard 5032 crystal oscillator footprints and optimized for minimal board space and thermal performance.

Pin/Terminal	Circuit Role	Design Meaning
1: NC	No Connect	Unbonded pad; must be left floating or tied to GND per layout best practice - no electrical function.
2: OE	Output Enable (LVCMOS input)	Active-low control: drives outputs to high-impedance when low; internal pulldown requires 10 kΩ external pullup for reliable startup.
3: GND	Ground	Primary analog/digital return; must connect to solid ground plane via ≥3 thermal vias to maintain thermal reliability and jitter performance.
4: OUTP	Differential Output Positive	LVDS output terminal; requires 100 Ω differential termination to match characteristic impedance of controlled-impedance PCB traces.
5: OUTN	Differential Output Negative	Complementary LVDS output terminal; routed as matched-length, tightly coupled pair with OUTP to preserve signal integrity.
6: VDD	3.3-V Power Supply	Analog supply input; requires local decoupling with 10 µF, 1 µF, and 0.1 µF capacitors placed adjacent to pin per TI layout guidelines.

Key Features

Feature	Design Value
Low RMS phase jitter	150 fs typical (12 kHz–20 MHz) - directly supports sub-picosecond timing budgets in 25+ Gbps SerDes and high-resolution sampling systems.
High PSRR	–60 dBc across 50 kHz–1 MHz - suppresses switching noise from shared DC/DC converters, enabling cleaner clock signals without dedicated low-noise regulators.
Factory-programmed frequency	266.66 MHz LVDS - eliminates external configuration components and firmware setup; shipped ready-to-use on power-up.
Industrial temperature range	–40°C to +85°C - validated for continuous operation in uncontrolled ambient environments such as outdoor base stations and industrial controllers.
OE-controlled output disable	50 µs enable/disable latency - allows dynamic clock gating during system sleep modes or hot-plug events without glitch generation.

Applications

FPGA Clock Reference	Processor System Clock
Use Scenario: Provides primary reference clock to Xilinx Versal or Intel Agilex FPGAs for transceiver banks and logic fabric timing. IC Role / Device Role / Timing Role: High-stability LVDS clock source synchronized to PCIe Gen3/Gen4 root complex and memory controller interfaces. Use Value: 150 fs jitter ensures <10⁻¹² bit error rate in 25.78125 Gbps PAM4 links and meets FPGA vendor AC timing margin requirements.	Use Scenario: Supplies system clock to ARM Cortex-A72/A76 or RISC-V SoCs in edge AI inference modules. IC Role / Device Role / Timing Role: Primary timing reference for CPU cluster, DDR4/DDR5 memory controller, and peripheral bus synchronization. Use Value: ±50 ppm stability over temperature and life guarantees boot ROM execution and DRAM training sequence reliability.
Network Line Card Timing	Test & Measurement Instrumentation
Use Scenario: Generates 266.66 MHz reference for packet processing ASICs and SERDES in 100G/400G optical line cards. IC Role / Device Role / Timing Role: Low-phase-noise clock source for multi-channel parallel data paths and deterministic latency control. Use Value: –60 dBc PSRR prevents power rail noise from degrading BER in coherent optical modulation schemes.	Use Scenario: Serves as master clock in high-resolution oscilloscopes and arbitrary waveform generators. IC Role / Device Role / Timing Role: Ultra-low-jitter reference for ADC sampling clocks and DAC update timing in 12+ bit, 1+ GS/s systems. Use Value: 150 fs RMS jitter translates to <0.001 LSB timing uncertainty in 12-bit, 1 GHz sampling applications.

FPGA Clock Reference

Processor System Clock

Use Scenario: Provides primary reference clock to Xilinx Versal or Intel Agilex FPGAs for transceiver banks and logic fabric timing.

IC Role / Device Role / Timing Role: High-stability LVDS clock source synchronized to PCIe Gen3/Gen4 root complex and memory controller interfaces.

Use Value: 150 fs jitter ensures <10⁻¹² bit error rate in 25.78125 Gbps PAM4 links and meets FPGA vendor AC timing margin requirements.

Use Scenario: Supplies system clock to ARM Cortex-A72/A76 or RISC-V SoCs in edge AI inference modules.

IC Role / Device Role / Timing Role: Primary timing reference for CPU cluster, DDR4/DDR5 memory controller, and peripheral bus synchronization.

Use Value: ±50 ppm stability over temperature and life guarantees boot ROM execution and DRAM training sequence reliability.

Network Line Card Timing

Test & Measurement Instrumentation

Use Scenario: Generates 266.66 MHz reference for packet processing ASICs and SERDES in 100G/400G optical line cards.

IC Role / Device Role / Timing Role: Low-phase-noise clock source for multi-channel parallel data paths and deterministic latency control.

Use Value: –60 dBc PSRR prevents power rail noise from degrading BER in coherent optical modulation schemes.

Use Scenario: Serves as master clock in high-resolution oscilloscopes and arbitrary waveform generators.

IC Role / Device Role / Timing Role: Ultra-low-jitter reference for ADC sampling clocks and DAC update timing in 12+ bit, 1+ GS/s systems.

Use Value: 150 fs RMS jitter translates to <0.001 LSB timing uncertainty in 12-bit, 1 GHz sampling applications.

Equivalent & Alternatives

The following parts are listed as comparable options for similar oscillator applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
LMK62E2-266M66SIAT	LVPECL output (not LVDS); same 266.66 MHz, ±50 ppm, and SIA package.	Requires LVPECL-compatible receivers and 150 Ω termination; higher power draw (~110 mA vs. ~100 mA).	Select when interfacing with legacy FPGA transceivers or ASICs specifying LVPECL inputs.
Si510-266M660000DG	266.66 MHz HCSL output; ±20 ppm stability; different 5-pin SOIC package; programmable via I²C.	Higher frequency stability but incompatible pinout and interface; requires configuration firmware and I²C host.	Choose when tighter tolerance (±20 ppm) is mandatory and board redesign for SOIC footprint is acceptable.

Compared with LMK62A2-266M66SIAT, the LMK62E2-266M66SIAT offers identical frequency and stability but demands LVPECL-level termination and consumes more current, while the Si510-266M660000DG provides superior accuracy and programmability at the cost of added system complexity and non-drop-in replacement.

Availability

LMK62A2-266M66SIAT is available at Aetrix Electronics and suitable for FPGA clocking, network infrastructure timing, and test equipment design requiring stable component supply, consistent parametric performance, and long-term production continuity.

Supply support for LMK62A2-266M66SIAT includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and clock solutions, with decades of expertise in precision timing and signal integrity.

The LMK62XX family was designed specifically for high-performance clock replacement in datacenter, telecom, and test equipment-delivering low-jitter, factory-programmed oscillators that eliminate crystal matching and simplify system-level timing architecture.

FAQ

What output format does the LMK62A2-266M66SIAT use?

The LMK62A2-266M66SIAT delivers a differential LVDS output at 266.66 MHz. Its LVDS interface provides 300–480 mV differential swing, 45–55% duty cycle, and requires 100 Ω differential termination. This matches JEDEC-compliant LVDS receivers used in FPGAs, processors, and high-speed SerDes blocks.

What is the total frequency tolerance specification for LMK62A2-266M66SIAT?

The LMK62A2-266M66SIAT has a total frequency tolerance of ±50 ppm. This value encompasses initial calibration error, temperature drift across –40°C to +85°C, supply voltage variation, solder reflow-induced shift, and 5-year aging at 40°C - verified per TI's characterization methodology.

Does LMK62A2-266M66SIAT support output enable/disable control?

Yes, the LMK62A2-266M66SIAT includes an OE (Output Enable) pin (Pin 2) that is LVCMOS-compatible and internally pulled down. When driven low, both OUTP and OUTN enter high-impedance state within 50 µs; a 10 kΩ external pullup resistor is recommended to ensure reliable startup behavior.

What package type and dimensions does LMK62A2-266M66SIAT use?

The LMK62A2-266M66SIAT uses the SIA package: a 6-pin Quad Flat Module measuring 5.00 mm × 3.20 mm with 1.1 mm max height. It is pin-compatible with industry-standard 5032 XO footprints, enabling drop-in replacement of legacy crystal oscillators without PCB redesign.

How does the LMK62A2-266M66SIAT achieve low phase jitter?

The LMK62A2-266M66SIAT achieves 150 fs RMS phase jitter (12 kHz–20 MHz) through a high-Q integrated PLL architecture, on-die power regulation, and optimized LVDS output driver design. Its –60 dBc PSRR further isolates the oscillator core from supply noise, preserving jitter performance in noisy system environments.

LMK62A2-266M66SIAT Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Series:: LMK62XX

Package/Case:: 6-SMD Module

Packaging:: Tape & Reel (TR)

Product Status:: Not For New Designs

Base Resonator:: Silicon

Type:: XO (Standard)

Frequency:: 266.66 MHz

Function:: Enable/Disable

Output:: LVDS

Voltage - Supply:: 3.3V

Frequency Stability:: ±50ppm

Absolute Pull Range (APR):: -

Operating Temperature:: -40°C ~ 85°C

Spread Spectrum Bandwidth:: -

Current - Supply (Max):: 100mA

Ratings:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 6-QFM (5x3.2)

Size / Dimension:: 0.197" L x 0.126" W (5.00mm x 3.20mm)

Height - Seated (Max):: 0.043" (1.10mm)

LMK62A2-266M66SIAT FAQ

1.How can I place an order for LMK62A2-266M66SIAT through Aetrix?

Please submit a Request for Quotation (RFQ) for LMK62A2-266M66SIAT on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for LMK62A2-266M66SIAT reliable?

The price and inventory of LMK62A2-266M66SIAT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMK62A2-266M66SIAT is usually 5 days.

3.What payment methods are accepted for LMK62A2-266M66SIAT?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMK62A2-266M66SIAT transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for LMK62A2-266M66SIAT?

LMK62A2-266M66SIAT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your LMK62A2-266M66SIAT order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for LMK62A2-266M66SIAT?

For technical support, including LMK62A2-266M66SIAT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMK62A2-266M66SIAT requirements.

6.How does Aetrix verify that LMK62A2-266M66SIAT is sourced from the original manufacturer or authorized distributors?

All LMK62A2-266M66SIAT products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that LMK62A2-266M66SIAT meets industry standards.

7.What is the process for return or replacement of LMK62A2-266M66SIAT?

All LMK62A2-266M66SIAT units undergo pre-shipment inspection (PSI). If there is an issue with LMK62A2-266M66SIAT, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The LMK62A2-266M66SIAT part is unused and in its original packaging.

Return procedure for LMK62A2-266M66SIAT:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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