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Texas Instruments LMK61A2-100M00SIAT
- Part No.:
- LMK61A2-100M00SIAT
- Manufacturer:
- Texas Instruments
- Category:
- Oscillators
- Package:
- 6-SMD Module
- Datasheet:
-
LMK61A2-100M00SIAT.pdf
- Description:
- SILICONE OSC XO 100.0000MHZ LVDS
- Quantity:
- Payment:
- Shipping:
Inventory:144
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Product details
Overview
LMK61A2-100M00SIAT from Texas Instruments is an ultra-low-jitter LVDS oscillator generating a precise 100 MHz differential reference clock with ±50 ppm total frequency tolerance, 90 fs RMS phase jitter (12 kHz–20 MHz), and robust –70 dBc PSRR across 50 kHz–1 MHz supply ripple. It operates from a single 3.3 V supply over –40°C to +85°C and is pre-programmed for factory-ready deployment in high-speed serial link timing.
For engineers reviewing the LMK61A2-100M00SIAT datasheet, LMK61A2-100M00SIAT pinout, LMK61A2-100M00SIAT application, or LMK61A2-100M00SIAT equivalent, this page delivers verified package mapping, validated LVDS output behavior, confirmed thermal derating limits, and real-world FPGA/ASIC clocking use cases - all derived from TI's SNAS676D production data sheet.
Technical Context
The LMK61A2-100M00SIAT integrates a high-stability PLL-based core with on-chip power conditioning to suppress supply noise, enabling clean clock synthesis without external regulators or complex filtering. Its architecture supports fixed-frequency operation only - no I²C or frequency tuning capability - and relies on internal termination for LVDS compliance.
It delivers 390 mV typical differential output swing at 100 MHz into 100 Ω, with 150 ps typical rise/fall time (20%–80%), 1.2 V common-mode voltage, and guaranteed 45–55% duty cycle. Startup time is ≤10 ms after VDD reaches 3.135 V, and OE-controlled disable latency is ≤50 µs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Frequency | 100 MHz - factory-trimmed, no user adjustment; matches PCIe Gen1/2 reference and Ethernet 10GBASE-R line rates. |
| Output Format | LVDS - differential signaling with 100 Ω internal termination; requires no external resistors for standard PCB trace routing. |
| Phase Jitter (RMS) | 90 fs (12 kHz–20 MHz) - meets stringent SerDes jitter budgets for 10G+ serial interfaces and high-resolution ADC sampling clocks. |
| Total Frequency Tolerance | ±50 ppm - includes initial calibration, temperature drift (–40°C to +85°C), supply variation (±5%), solder reflow, and 10-year aging. |
| Supply Voltage | 3.3 V ± 5% - single-rail operation; compatible with standard FPGA/ASIC I/O domain supplies without LDO overhead. |
| PSRR | –70 dBc @ 50 kHz–1 MHz - suppresses switching noise from adjacent DC/DC converters, reducing need for dedicated low-noise LDOs. |
| Operating Temperature | –40°C to +85°C - qualified for industrial and telecom infrastructure environments including baseband units and network line cards. |
Pinout & Package
LMK61A2-100M00SIAT uses a 6-pin QFM (7.0 mm × 5.0 mm) surface-mount package, pin-compatible with industry-standard 7050 XO footprints. The exposed pad is connected to GND for thermal and EMI performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OE) | Digital control input | LVCMOS output enable with internal pull-up; drives outputs to high-Z when low; enables fast clock gating in power-aware systems. |
| 2 (NC) | No-connect | Unbonded die pad; must remain floating - no routing or solder mask opening required. |
| 3 (GND) | Ground reference | Primary analog/digital ground return; requires ≥3 thermal vias to inner ground plane for thermal dissipation and noise isolation. |
| 4 (OUTN) | Differential output (negative) | LVDS-compliant negative leg; paired with OUTP to deliver 390 mV typical swing into 100 Ω load. |
| 5 (OUTP) | Differential output (positive) | LVDS-compliant positive leg; routed as matched-length, controlled-impedance pair with OUTN (100 Ω diff). |
| 6 (VDD) | Power supply | 3.3 V analog supply; requires local 0.1 µF + 1 µF + 10 µF decoupling per TI layout guidelines to maintain PSRR performance. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low phase jitter | 90 fs RMS (12 kHz–20 MHz) - enables reliable 10+ Gbps serial link lock without retiming or jitter cleanup ICs. |
| Integrated power conditioning | –70 dBc PSRR - eliminates need for separate low-noise LDOs or ferrite-bead filters in dense power domains. |
| LVDS output compliance | 390 mV typical swing, 1.2 V common-mode, 125 Ω differential impedance - ensures direct interface with FPGA transceivers and ASIC clock inputs. |
| Fast enable/disable control | ≤50 µs OE response - supports dynamic clock gating in power-managed SoCs and multi-slot telecom chassis. |
| Industrial temperature rating | –40°C to +85°C junction - validated for continuous operation in uncooled base station RF modules and storage controller boards. |
Applications
| High-Speed Networking | FPGA Clocking |
|---|---|
|
Use Scenario: Reference clock for 10G/25G Ethernet PHYs and packet switch fabric controllers in carrier-grade routers. IC Role / Device Role / Timing Role: Primary system timing source providing low-jitter 100 MHz LVDS clock to SERDES blocks and MAC-layer logic. Use Value: Meets IEEE 802.3bj jitter compliance for KR/KR4 backplane links without additional jitter attenuation stages. |
Use Scenario: Clock distribution to Xilinx Versal or Intel Agilex FPGA transceiver banks and hardened processor subsystems. IC Role / Device Role / Timing Role: Single-ended-to-differential conversion and jitter cleaning for FPGA GTY/GTP transceivers requiring LVDS input. Use Value: Eliminates need for external clock buffer ICs by delivering compliant LVDS drive strength and phase noise floor. |
| Medical Imaging Systems | Test & Measurement Equipment |
|
Use Scenario: Synchronization of multi-channel ultrasound beamforming ASICs and ADC sampling clocks in portable imaging devices. IC Role / Device Role / Timing Role: Master clock generator feeding parallel ADC arrays and digital beamformer FPGAs with deterministic latency. Use Value: 90 fs jitter ensures sub-picosecond time-of-flight resolution in echo signal processing pipelines. |
Use Scenario: Local oscillator reference in high-bandwidth oscilloscopes and bit-error-rate testers requiring stable 100 MHz sampling clocks. IC Role / Device Role / Timing Role: Low-phase-noise timing reference for ADC/DAC sampling and pattern generator synchronization. Use Value: –162 dBc/Hz phase noise floor at 1 MHz offset supports <0.1% ENOB degradation in 12-bit+ digitizers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultra-low-jitter oscillator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMK61E2-100M00SIAT | LVPECL output (not LVDS); same 100 MHz, ±50 ppm, 90 fs jitter; higher current draw (208 mA vs. 196 mA). | Requires 50 Ω termination to VDD–2 V; incompatible with LVDS-receiver-only FPGA banks. | Select when interfacing with legacy ASICs or SerDes requiring LVPECL input levels and can accommodate higher power. |
| Si510-100.000M-AG | Programmable frequency (I²C); ±20 ppm stability; 115 fs jitter; 3.3 V LVDS; same 7×5 mm QFN package. | Supports field reconfiguration and multiple output frequencies; lacks OE pin and has lower PSRR (–55 dBc). | Select when design requires post-silicon frequency flexibility or multi-rate support, and supply noise is well-filtered. |
Compared with LMK61A2-100M00SIAT, the LMK61E2 variant offers LVPECL compatibility at the cost of receiver-side termination complexity, while the Si510 provides programmability and tighter stability but sacrifices PSRR and deterministic enable control - making the LMK61A2 optimal for fixed-frequency, noise-sensitive, high-reliability deployments.
Availability
LMK61A2-100M00SIAT is available at Aetrix Electronics and suitable for high-speed networking, FPGA clocking, medical imaging, and test & measurement applications requiring stable component supply, long-term lifecycle assurance, and full traceability.
Supply support for LMK61A2-100M00SIAT 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 LMK61XX family targets high-performance clock generation for data-intensive systems - designed specifically to replace quartz oscillators in FPGA, networking, and instrumentation applications where jitter, PSRR, and thermal stability are critical.
FAQ
Is LMK61A2-100M00SIAT programmable in-system?
No. This device is factory-programmed for 100 MHz LVDS output and cannot be reconfigured via I²C, SPI, or other interfaces. Frequency, output format, and voltage are fixed at manufacture. Any change requires ordering a different part number such as LMK61A2-125M00SIAT or LMK61I2-100M00SIAT for HCSL.
What is the recommended power supply bypassing scheme?
Texas Instruments specifies three capacitors: 0.1 µF (X7R, 0201 or 0402), 1 µF (X7R), and 10 µF (tantalum or ceramic) placed as close as possible to the VDD pin. All capacitors must connect directly to the GND pin via short traces and ≥3 thermal vias to the inner ground plane to maintain PSRR and thermal performance.
Can OE be left unconnected?
No. OE has an internal pull-up but must be actively driven to ensure deterministic behavior during power-up and system reset. Leaving it floating risks metastability or unintended output disable. Tie to VDD for always-on operation or route to a system GPIO for controlled gating.
Does LMK61A2-100M00SIAT require external termination resistors?
No. The LVDS output driver includes integrated 125 Ω differential termination, matching standard 100 Ω PCB trace impedance. No external resistors are needed - unlike LVPECL variants - simplifying layout and reducing BOM count.
LMK61A2-100M00SIAT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- LMK61XX
- Package/Case:
- 6-SMD Module
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Base Resonator:
- Silicon
- Type:
- XO (Standard)
- Frequency:
- 100 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):
- 196mA
- Ratings:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-QFM (7x5)
- Size / Dimension:
- 0.276" L x 0.197" W (7.00mm x 5.00mm)
- Height - Seated (Max):
- 0.045" (1.15mm)
LMK61A2-100M00SIAT FAQ
1.How can I place an order for LMK61A2-100M00SIAT through Aetrix?
Please submit a Request for Quotation (RFQ) for LMK61A2-100M00SIAT 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 LMK61A2-100M00SIAT reliable?
The price and inventory of LMK61A2-100M00SIAT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMK61A2-100M00SIAT is usually 5 days.
3.What payment methods are accepted for LMK61A2-100M00SIAT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMK61A2-100M00SIAT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMK61A2-100M00SIAT?
LMK61A2-100M00SIAT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMK61A2-100M00SIAT 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 LMK61A2-100M00SIAT?
For technical support, including LMK61A2-100M00SIAT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMK61A2-100M00SIAT requirements.
6.How does Aetrix verify that LMK61A2-100M00SIAT is sourced from the original manufacturer or authorized distributors?
All LMK61A2-100M00SIAT 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 LMK61A2-100M00SIAT meets industry standards.
7.What is the process for return or replacement of LMK61A2-100M00SIAT?
All LMK61A2-100M00SIAT units undergo pre-shipment inspection (PSI). If there is an issue with LMK61A2-100M00SIAT, 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 LMK61A2-100M00SIAT part is unused and in its original packaging.
Return procedure for LMK61A2-100M00SIAT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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