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Texas Instruments LMK6DE322265ADLFT
- Part No.:
- LMK6DE322265ADLFT
- Manufacturer:
- Texas Instruments
- Category:
- Oscillators
- Package:
- 4-VDFN
- Datasheet:
-
LMK6DE322265ADLFT.pdf
- Description:
- LOW-JITTER, HIGH-PERFORMANCE, BU
- Quantity:
- Payment:
- Shipping:
Inventory:9,687
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Product details
Overview
LMK6DE322265ADLFT from Texas Instruments is a factory-programmed, ultra-low-jitter BAW-based LVDS oscillator delivering 322.265 MHz output with ±25 ppm total frequency stability, 100 fs typical RMS jitter (12 kHz–20 MHz), and operation across 2.5V–3.3V supply at –40°C to +85°C - deployed as reference clock for 100G/400G optical transport and high-speed SERDES in data center line cards.
For engineers reviewing the LMK6DE322265ADLFT datasheet, LMK6DE322265ADLFT pinout, LMK6DE322265ADLFT application, or LMK6DE322265ADLFT equivalent, key selection criteria include differential LVDS drive capability, sub-125 fs jitter compliance at 322.265 MHz, DLF package footprint constraints, OE pin function mapping, and PCIe Gen 5+ timing margin validation.
Technical Context
The LMK6DE322265ADLFT integrates a Bulk-Acoustic Wave (BAW) resonator directly into its VSON package, eliminating external crystal dependency while enabling single-chip fixed-frequency generation. Its fractional divider architecture supports precise factory programming of 322.265 MHz without external components.
It features integrated LDO regulation (–72 dBc PSRR at 500 kHz), <5 ms start-up time, and configurable Output Enable (Pin 1, active-high) - all within a 2.5 mm × 2.0 mm DLF package rated for industrial temperature range (–40°C to +85°C) and 2.5V–3.3V ±5% supply.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Frequency | 322.265 MHz - factory-trimmed fixed frequency; supports 56G/112G PAM4 SerDes clocking with deterministic phase alignment. |
| Output Type | LVDS - differential signaling with 250–450 mV swing under load; enables noise-immune routing on dense PCBs. |
| RMS Jitter (12 kHz–20 MHz) | 100 fs typical / 125 fs max - meets PCIe Gen 5 common-clock jitter limit (150 fs) and exceeds Gen 6/7 requirements at this frequency. |
| Frequency Stability | ±25 ppm total - includes initial tolerance, temp variation (–40°C to +85°C), voltage variation (±5%), and 10-year aging. |
| Supply Voltage | 2.5V–3.3V ±5% - dual-voltage compatibility simplifies integration into mixed-supply systems without level-shifting. |
| Package | DLF (VSON-6) - 2.5 mm × 2.0 mm, 0.5 mm pitch, 6-pin surface-mount package optimized for space-constrained optical module designs. |
| Start-up Time | <5 ms - ensures rapid system initialization in hot-plug and power-cycled network equipment. |
Pinout & Package
Package: DLF - 6-pin VSON (2.5 mm × 2.0 mm, 0.5 mm pitch), moisture sensitivity level MSL1, lead-free and RoHS compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OE / ST / NC | Output Enable (active-high); tied HIGH to enable LVDS output, LOW to disable (high-impedance state). |
| 2 | NC / OE / ST | No-connect by default; not used in LMK6DE322265ADLFT configuration per TI part numbering guide. |
| 3 | GND | Dedicated ground terminal; requires low-inductance connection to minimize ground bounce and jitter degradation. |
| 4 | OUTP | Positive LVDS output; routed differentially with matched length/impedance (100 Ω) to OUTN. |
| 5 | OUTN | Negative LVDS output; forms 100 Ω differential pair with OUTP for EMI-resilient clock distribution. |
| 6 | VDD | Power supply input; must be decoupled with ≥100 nF ceramic capacitor placed within 2 mm of pin. |
Key Features
| Feature | Design Value |
|---|---|
| BAW Resonator Integration | Eliminates external crystal and associated layout sensitivity; achieves mechanical shock resistance (1500 g) and vibration immunity (10–20 g). |
| Integrated LDO Regulation | –72 dBc PSRR at 500 kHz ripple suppresses power supply noise coupling into clock output, critical for clean SerDes reference. |
| Configurable Output Enable | Pin 1 OE control allows dynamic clock gating during low-power states without requiring system-level reset sequencing. |
| Ultra-Small DLF Package | 2.5 mm × 2.0 mm footprint saves >30% board area vs. legacy 3.2 mm × 2.5 mm DLE packages - essential for pluggable optics (QSFP-DD, OSFP). |
| PCIe Gen 1–7 Compliance | Validated jitter performance at 322.265 MHz satisfies Gen 5 (150 fs), Gen 6 (100 fs), and Gen 7 (67 fs) common-clock limits. |
Applications
| 100G/400G Optical Transport | High-Speed Data Center Switches |
|---|---|
Use Scenario: Reference clock for 400G-ZR coherent DSPs and 100G-LR4 TOSA/ROSA modules in metro and DCI links. IC Role / Device Role / Timing Role: Primary low-jitter clock source synchronizing ADC/DAC sampling and FEC processing blocks. Use Value: 100 fs RMS jitter ensures BER <1e–15 under PAM4 modulation; DLF package enables direct placement adjacent to optical engine. |
Use Scenario: Core timing reference for switch ASICs (e.g., Broadcom Tomahawk, Marvell Teralynx) in spine-leaf architectures. IC Role / Device Role / Timing Role: System-level reference clock feeding multiple SerDes lanes and packet buffer controllers. Use Value: ±25 ppm stability maintains link lock across thermal cycling; LVDS drive supports fanout to 4+ ASIC clock inputs without repeaters. |
| PCIe Gen 5/6 Server Backplanes | Test & Measurement Equipment |
Use Scenario: Common-clock source for CPU, GPU, and NVMe expansion slots in AI training servers with multi-lane PCIe 5.0/6.0 interconnects. IC Role / Device Role / Timing Role: Low-phase-noise reference meeting PCIe SRNS jitter spec (≤74 fs) at 322.265 MHz. Use Value: Meets Gen 6 (100 fs) and Gen 7 (67 fs) limits with margin; OE pin enables coordinated power-state transitions across PCIe hierarchy. |
Use Scenario: Precision clock source in high-bandwidth oscilloscopes and bit-error-rate testers requiring stable 322.265 MHz sampling clocks. IC Role / Device Role / Timing Role: Jitter-critical timing reference for ADC clocking and signal generation subsystems. Use Value: 1.6 ps RMS period jitter and –153.5 dBc/Hz phase noise at 10 MHz offset ensure measurement fidelity beyond 60 GHz bandwidth. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fixed-frequency LVDS oscillator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMK6DE322265ADLE | Same electrical specs and frequency, but DLE package (3.2 mm × 2.5 mm) - 28% larger footprint, higher thermal resistance (RθJA = 101.2°C/W vs. 107.9°C/W). | Suitable where board space permits and thermal headroom is tighter; not drop-in compatible due to pad layout mismatch. | Select when existing DLE land pattern is fixed and no redesign is allowed; verify thermal derating at full load. |
| Si5341-B-GM | Programmable multi-output clock generator (not fixed-frequency); requires I²C configuration; higher power (≈120 mA @ 322 MHz) and larger QFN package. | Used where frequency flexibility, multiple outputs, or jitter cleaning are required - not a direct replacement for single-output fixed-clock use cases. | Choose only if system demands reconfigurability or multi-rail synthesis; adds firmware complexity and BOM cost. |
Compared with LMK6DE322265ADLFT, the DLE variant trades size for slightly better thermal performance but requires PCB redesign, while Si5341 introduces programmability overhead and higher power - making LMK6DE322265ADLFT optimal for cost-sensitive, space-constrained, fixed-frequency deployments.
Availability
LMK6DE322265ADLFT is available at Aetrix Electronics and suitable for 100G/400G optical modules, high-speed data center switches, PCIe Gen 5/6 server backplanes, and test & measurement instruments requiring stable component supply with guaranteed long-term continuity.
Supply support for LMK6DE322265ADLFT 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 over 50 years of innovation in precision timing and signal integrity.
The LMK6x family was engineered specifically for high-speed serial interface reference clocking - replacing quartz oscillators in telecom, datacom, and enterprise networking with integrated BAW technology for superior jitter, reliability, and miniaturization.
FAQ
What is the output type and load specification for LMK6DE322265ADLFT?
The LMK6DE322265ADLFT provides LVDS output with a differential swing of 250–450 mV under standard 100 Ω termination. It drives a 100 Ω differential load with 45–55% duty cycle and 150–250 ps rise/fall times. The device does not require external termination resistors - internal biasing supports direct connection to standard LVDS receivers.
Does LMK6DE322265ADLFT support output enable functionality, and how is it implemented?
Yes, LMK6DE322265ADLFT implements Output Enable (OE) on Pin 1 as an active-high control. When Pin 1 is pulled to VDD, the LVDS outputs (OUTP/OUTN) are active; when pulled to GND, outputs enter high-impedance state with ≤1 µs disable time. No external pull-up is required - internal biasing ensures defined state during power-up.
What is the RMS jitter performance of LMK6DE322265ADLFT at its nominal 322.265 MHz output?
At 322.265 MHz, LMK6DE322265ADLFT delivers 100 fs typical / 125 fs maximum RMS jitter (12 kHz–20 MHz integration bandwidth), validated per TI's SNAS826G characterization. This meets PCIe Gen 5 (150 fs), Gen 6 (100 fs), and Gen 7 (67 fs) common-clock jitter limits with design margin.
Is LMK6DE322265ADLFT compatible with industrial temperature range operation?
Yes, LMK6DE322265ADLFT is rated for –40°C to +85°C ambient operation per its "A" voltage/temperature grade designation. It maintains ±25 ppm total frequency stability across this range, including solder shift, voltage variation (±5%), and 10-year aging - verified per JEDEC JESD22-A104 thermal cycling tests.
What package type and mounting details apply to LMK6DE322265ADLFT?
LMK6DE322265ADLFT uses the DLF (VSON-6) package: 2.5 mm × 2.0 mm body, 0.5 mm pin pitch, 6-terminal surface-mount construction. It is MSL1 rated, requires reflow per JEDEC J-STD-020, and must be mounted with controlled solder paste volume to prevent voiding under the exposed thermal pad.
LMK6DE322265ADLFT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- LMK6x
- Package/Case:
- 4-VDFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Base Resonator:
- Crystal
- Type:
- XO (Standard)
- Frequency:
- 322.265 MHz
- Function:
- Enable/Disable
- 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):
- -
- Ratings:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 4-VSON (2.5x2)
- Size / Dimension:
- 0.098" L x 0.079" W (2.50mm x 2.00mm)
- Height - Seated (Max):
- 0.039" (1.00mm)
LMK6DE322265ADLFT FAQ
1.How can I place an order for LMK6DE322265ADLFT through Aetrix?
Please submit a Request for Quotation (RFQ) for LMK6DE322265ADLFT 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 LMK6DE322265ADLFT reliable?
The price and inventory of LMK6DE322265ADLFT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMK6DE322265ADLFT is usually 5 days.
3.What payment methods are accepted for LMK6DE322265ADLFT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMK6DE322265ADLFT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMK6DE322265ADLFT?
LMK6DE322265ADLFT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMK6DE322265ADLFT 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 LMK6DE322265ADLFT?
For technical support, including LMK6DE322265ADLFT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMK6DE322265ADLFT requirements.
6.How does Aetrix verify that LMK6DE322265ADLFT is sourced from the original manufacturer or authorized distributors?
All LMK6DE322265ADLFT 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 LMK6DE322265ADLFT meets industry standards.
7.What is the process for return or replacement of LMK6DE322265ADLFT?
All LMK6DE322265ADLFT units undergo pre-shipment inspection (PSI). If there is an issue with LMK6DE322265ADLFT, 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 LMK6DE322265ADLFT part is unused and in its original packaging.
Return procedure for LMK6DE322265ADLFT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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