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Texas Instruments LMK6DA12500ADLFT
- Part No.:
- LMK6DA12500ADLFT
- Manufacturer:
- Texas Instruments
- Category:
- Oscillators
- Package:
- 6-VDFN
- Datasheet:
-
LMK6DA12500ADLFT.pdf
- Description:
- SILICONE OSC XO 125.0000MHZ LVDS
- Quantity:
- Payment:
- Shipping:
Inventory:226
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Product details
Overview
LMK6DA12500ADLFT from Texas Instruments is a factory-programmed, ultra-low-jitter BAW-based LVDS oscillator delivering 125 MHz fixed-frequency output with ±25 ppm total stability over –40°C to 85°C, 2.5V–3.3V supply, and 100 fs typical RMS jitter (12 kHz–20 MHz). It serves as a high-precision reference clock in SERDES lanes for optical transport, data center switches, and PCIe Gen 7-compliant systems.
For engineers reviewing the LMK6DA12500ADLFT datasheet, LMK6DA12500ADLFT pinout, LMK6DA12500ADLFT application, or LMK6DA12500ADLFT equivalent, key selection criteria include its DLF package size (2.5 mm × 2.0 mm), Pin 1 Standby (active low) control, LVDS differential drive compliance, and guaranteed jitter performance at 125 MHz under industrial temperature and voltage conditions.
Technical Context
The LMK6DA12500ADLFT integrates a Bulk-Acoustic Wave (BAW) resonator directly into its VSON package, eliminating external crystal dependencies and enabling mechanical robustness and sub-125 fs RMS jitter. Its fractional frequency divider is factory-configured for exact 125 MHz output without user programming.
It features integrated LDO regulation with –72 dBc PSRR at 500 kHz ripple, supports fast start-up (< 5 ms), and uses Pin 1 as active-low Standby control-disabling outputs while drawing only 6–13 mA standby current. All timing and electrical behavior is validated specifically for the LMK6D variant with LVDS interface.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Frequency | 125 MHz - factory-trimmed, no configuration required; meets PCIe Gen 7 common-clock jitter limit (67 fs) |
| RMS Jitter (12 kHz–20 MHz) | 100 fs typical / 125 fs max - enables reliable 112G PAM4 sampling margins in coherent optics |
| Frequency Stability | ±25 ppm total - includes 10-year aging, temp (–40°C to 85°C), voltage (±5% of 2.5V/3.3V), and solder shift |
| Output Type | LVDS - 250–450 mV swing, 1.025–1.375 V common-mode, compatible with standard 100 Ω differential termination |
| Supply Voltage | 2.5V–3.3V ±5% - single-rail operation; internal LDO rejects supply noise up to –72 dBc at 500 kHz |
| Package | DLF (VSON-6) - 2.5 mm × 2.0 mm, 0.5 mm pitch, 6-pin exposed-pad package optimized for high-density PCB layouts |
| Start-up Time | < 5 ms - measured from 0.95×VDD to stable output within spec; critical for power-gated systems |
Pinout & Package
Package: DLF - 6-pin VSON (2.5 mm × 2.0 mm, 0.5 mm pitch), thermally enhanced with exposed thermal pad.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Standby (ST) | Active-low enable control; pulling to GND disables outputs and reduces current to 6–13 mA |
| 2 | No Connect (NC) | Internally unused; must be left floating or tied to GND per layout guidelines |
| 3 | GND | Signal and power ground reference; connects to exposed thermal pad for thermal dissipation |
| 4 | OUTP | Positive LVDS output; requires 100 Ω differential termination to VDD or dedicated termination voltage |
| 5 | OUTN | Negative LVDS output; paired with OUTP; maintains tight skew & phase matching (≤1 ps) |
| 6 | VDD | Primary power input (2.5V–3.3V); bypassed externally with 100 nF + 10 nF capacitors near pin |
Key Features
| Feature | Design Value |
|---|---|
| BAW Resonator Integration | Eliminates external crystal and load capacitors; achieves mechanical shock resistance (1500 g) and vibration immunity |
| Differential LVDS Output | Guaranteed 45–55% duty cycle, 150–250 ps rise/fall time, and <13 ps peak-to-peak period jitter at 125 MHz |
| Integrated LDO Regulation | –72 dBc PSRR at 500 kHz ripple enables direct connection to noisy SoC rails without additional filtering |
| Small Form Factor | DLF package (2.5 mm × 2.0 mm) saves >40% board area vs. legacy 3.2 mm × 2.5 mm DLE oscillators |
| Industrial Temp Range | Full specification validated from –40°C to +85°C - suitable for baseband units, line cards, and edge compute deployments |
Applications
| 56G/112G PAM4 Clocking | PCIe Gen 7 Reference Clock |
|---|---|
Use Scenario: High-speed serial links in AI accelerators and co-packaged optics requiring deterministic jitter below 100 fs RMS. IC Role / Device Role / Timing Role: Primary low-jitter reference clock driving CDR circuits in 112G SerDes PHYs. Use Value: Enables BER <1e–15 at 112 Gbps by meeting OIF CEI-112G-LR jitter mask with margin. |
Use Scenario: Root complex and endpoint timing in next-gen servers supporting PCIe Gen 7 (64 GT/s). IC Role / Device Role / Timing Role: Common-clock source meeting PCIe Gen 7 common-clock jitter limit of 67 fs RMS. Use Value: Guarantees link training success and sustained 64 GT/s throughput across temperature and voltage corners. |
| Optical Transport Network (OTN) | Data Center Switch Line Cards |
Use Scenario: Synchronous Ethernet and OTU4/OTU4+ framing in 400G/800G coherent transponders. IC Role / Device Role / Timing Role: Stratum-3E-compliant clock source for FEC and DSP timing domains. Use Value: Delivers ±25 ppm stability over 10 years - eliminates field recalibration in sealed modules. |
Use Scenario: Core timing for multi-terabit switch ASICs with 64+ SerDes lanes operating at 100+ Gbps/lane. IC Role / Device Role / Timing Role: Low-phase-noise reference feeding PLLs in switch fabric and packet processor clocks. Use Value: Reduces bit error rate by minimizing deterministic jitter accumulation across cascaded clock trees. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fixed-frequency oscillator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMK6DA15625ADLFT | Same LMK6D family, identical DLF package and LVDS output, but factory-programmed for 156.25 MHz | Targets 100G Ethernet (156.25 MHz) and CPRI/eCPRI applications instead of 125 MHz PCIe/OTN use cases | Select when system requires 156.25 MHz with identical jitter, stability, and package constraints |
| Si510-125.000M-DLGR | CMOS-based XO; 125 MHz output; ±20 ppm stability; 1.2 ps RMS jitter (12 kHz–20 MHz); 2.5 mm × 2.0 mm QFN | Higher jitter and lower stability than LMK6DA12500ADLFT; not qualified for PCIe Gen 7 or 112G PAM4 | Use only in cost-sensitive, non-critical timing roles where 100 fs jitter is not required |
Compared with LMK6DA12500ADLFT, the LMK6DA15625ADLFT offers identical performance at a different frequency, while the Si510-125.000M-DLGR trades 12× higher jitter and reduced long-term stability for broader vendor availability and lower unit cost in less demanding applications.
Availability
LMK6DA12500ADLFT is available at Aetrix Electronics and suitable for 56G/112G PAM4 clocking, PCIe Gen 7 reference designs, and optical transport network timing requiring stable component supply across extended industrial temperature ranges and high-volume production ramps.
Supply support for LMK6DA12500ADLFT 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 company specializing in analog, embedded processing, and clock solutions, with manufacturing and design centers across North America, Asia, and Europe.
The LMK6x product line was developed to replace quartz-based oscillators in high-speed digital systems, using integrated BAW technology to deliver ultra-low jitter, small footprint, and superior reliability in telecom, data center, and industrial timing applications.
FAQ
What is the output type and interface standard supported by LMK6DA12500ADLFT?
The LMK6DA12500ADLFT provides a differential LVDS output compliant with ANSI TIA/EIA-644-A. It delivers 250–450 mV voltage swing into a 100 Ω differential load, with common-mode voltage of 1.025–1.375 V at 2.5V–3.3V supply. This matches standard FPGA, ASIC, and SerDes receiver inputs without level-shifting circuitry.
Does LMK6DA12500ADLFT require external configuration or programming after soldering?
No. The LMK6DA12500ADLFT is factory-programmed for 125 MHz LVDS output with Pin 1 Standby functionality and requires no post-soldering configuration. All timing, voltage, and functional parameters are laser-trimmed during manufacturing - no I²C, SPI, or pin-strapping is needed.
What is the guaranteed RMS jitter performance of LMK6DA12500ADLFT at 125 MHz?
The LMK6DA12500ADLFT guarantees ≤125 fs RMS jitter (12 kHz–20 MHz integration bandwidth) at 125 MHz output, with 100 fs typical. This is validated per TI's SNAS826G datasheet and meets PCIe Gen 7 common-clock jitter limit (67 fs) with margin, making it suitable for 112G PAM4 and OTU4+ systems.
Can LMK6DA12500ADLFT operate across the full industrial temperature range?
Yes. The LMK6DA12500ADLFT is fully specified and tested from –40°C to +85°C, including all electrical parameters (jitter, frequency stability, start-up time, and output swing). Its ±25 ppm total stability includes aging, temperature, voltage, and solder-shift effects over this range.
What package and pin count does LMK6DA12500ADLFT use, and is thermal pad connection required?
The LMK6DA12500ADLFT uses the DLF (VSON-6) package: 2.5 mm × 2.0 mm, 0.5 mm pitch, 6-pin layout with an exposed thermal pad. The thermal pad must be soldered to a PCB thermal plane per TI's layout guidelines to maintain junction temperature within limits and ensure rated lifetime reliability.
LMK6DA12500ADLFT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- LMK6x
- Package/Case:
- 6-VDFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Base Resonator:
- Silicon
- Type:
- XO (Standard)
- Frequency:
- 125 MHz
- Function:
- Standby (Power Down)
- Output:
- LVDS
- Voltage - Supply:
- 2.5V ~ 3.3V
- Frequency Stability:
- ±25ppm
- Absolute Pull Range (APR):
- -
- Operating Temperature:
- -40°C ~ 85°C
- Spread Spectrum Bandwidth:
- -
- Current - Supply (Max):
- 75mA
- Ratings:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-VSON (2.5x2)
- Size / Dimension:
- 0.098" L x 0.079" W (2.50mm x 2.00mm)
- Height - Seated (Max):
- 0.039" (1.00mm)
LMK6DA12500ADLFT FAQ
1.How can I place an order for LMK6DA12500ADLFT through Aetrix?
Please submit a Request for Quotation (RFQ) for LMK6DA12500ADLFT 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 LMK6DA12500ADLFT reliable?
The price and inventory of LMK6DA12500ADLFT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMK6DA12500ADLFT is usually 5 days.
3.What payment methods are accepted for LMK6DA12500ADLFT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMK6DA12500ADLFT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMK6DA12500ADLFT?
LMK6DA12500ADLFT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMK6DA12500ADLFT 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 LMK6DA12500ADLFT?
For technical support, including LMK6DA12500ADLFT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMK6DA12500ADLFT requirements.
6.How does Aetrix verify that LMK6DA12500ADLFT is sourced from the original manufacturer or authorized distributors?
All LMK6DA12500ADLFT 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 LMK6DA12500ADLFT meets industry standards.
7.What is the process for return or replacement of LMK6DA12500ADLFT?
All LMK6DA12500ADLFT units undergo pre-shipment inspection (PSI). If there is an issue with LMK6DA12500ADLFT, 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 LMK6DA12500ADLFT part is unused and in its original packaging.
Return procedure for LMK6DA12500ADLFT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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