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Texas Instruments LMK6CE04000CDLFR
- Part No.:
- LMK6CE04000CDLFR
- Manufacturer:
- Texas Instruments
- Category:
- Oscillators
- Package:
- 4-VDFN
- Datasheet:
-
LMK6CE04000CDLFR.pdf
- Description:
- SILIC OSC XO 40.0000MHZ LVCMOS
- Quantity:
- Payment:
- Shipping:
Inventory:2,966
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Product details
Overview
LMK6CE04000CDLFR from Texas Instruments is a factory-programmed, ultra-low-jitter LVCMOS bulk-acoustic wave (BAW) oscillator delivering 40.000 MHz output with ±25 ppm total frequency stability over –40°C to +105°C, integrated LDO for –72 dBc PSRR at 500 kHz, and <5 ms start-up time. It serves as a high-stability reference clock for FPGA/ASIC timing, industrial control systems, and PCIe Gen 1–7 compliant applications requiring robust supply noise immunity.
For engineers reviewing the LMK6CE04000CDLFR datasheet, LMK6CE04000CDLFR pinout, LMK6CE04000CDLFR application, or LMK6CE04000CDLFR equivalent, key selection criteria include its 40 MHz LVCMOS output, 1.8V/2.5V/3.3V supply flexibility, DLF-4 VSON package (2.5 mm × 2.0 mm), and 350 fs typical RMS jitter at 100 MHz - critical for SERDES clocking in optical transport and data center line cards.
Technical Context
The LMK6CE04000CDLFR implements TI's monolithic BAW resonator integrated directly into the VSON package, eliminating external crystal dependencies and enabling superior mechanical stability and shock resistance. Its fractional output divider supports precise fixed-frequency synthesis without external PLL components.
It features dual-function control pins (OE/ST) configurable as output enable or standby, an integrated LDO with –72 dBc PSRR at 500 kHz ripple, and operates across –40°C to +105°C with full specification compliance - distinguishing it from standard quartz-based oscillators in thermal drift and aging performance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Frequency | 40.000 MHz - factory-programmed fixed frequency, optimized for PCIe reference clocks and FPGA system timing. |
| Output Type | LVCMOS - single-ended, rail-to-rail compatible with 1.8V/2.5V/3.3V logic interfaces and standard microcontroller clock inputs. |
| RMS Jitter (12 kHz–20 MHz) | 350 fs typical / 500 fs max at 100 MHz - enables compliance with stringent jitter budgets in 100G+ optical modules and high-speed ADC/DAC sampling clocks. |
| Frequency Stability | ±25 ppm total - includes initial tolerance, temperature variation (–40°C to +105°C), voltage variation, and 10-year aging - eliminates need for field recalibration. |
| Supply Voltage | 1.8V ±5%, 2.5V ±5%, or 3.3V ±5% - selectable via orderable part number; supports mixed-voltage board designs without level shifters. |
| Start-up Time | <5 ms - meets fast-boot requirements in industrial PLCs and telecom baseband units where deterministic power-on timing is essential. |
| PSRR | –72 dBc at 500 kHz - integrated LDO rejects switching regulator noise, reducing need for additional bulk capacitance on VDD. |
Pinout & Package
VSON-4 (DLF-4) package: 2.5 mm × 2.0 mm, 0.5 mm pitch, wettable flank, RoHS-compliant. Exposed thermal pad recommended for PCB thermal relief.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: OE / ST / NC | Input / No Connect | Configurable as active-high output enable or active-low standby; floating = output enabled - simplifies control logic in space-constrained designs. |
| 2: GND | Ground | Dedicated ground terminal; must be connected to low-impedance PCB ground plane to maintain jitter performance and PSRR. |
| 3: OUT | LVCMOS Output | Single-ended clock signal; 2.2 pF load-optimized rise/fall time of 0.5–1 ns - suitable for direct connection to FPGA clock inputs without series termination. |
| 4: VDD | Power Supply | Supplies internal BAW oscillator, LDO, and output driver; requires local 100 nF ceramic decoupling within 2 mm of pin. |
Key Features
| Feature | Design Value |
|---|---|
| Bulk-Acoustic Wave (BAW) Resonator | Monolithic silicon-based resonator co-packaged with clock circuitry - delivers 10× better shock/vibration immunity vs. quartz crystals and eliminates aging-related drift. |
| Integrated LDO Regulator | –72 dBc PSRR at 500 kHz ripple - suppresses noise from switch-mode power supplies, enabling cleaner clock signals without external regulators. |
| Extended Temperature Range | –40°C to +105°C operation - qualified for industrial automation, outdoor telecom equipment, and automotive under-hood auxiliary timing. |
| Ultra-Small VSON Package | DLF-4 (2.5 mm × 2.0 mm) - saves >60% board area vs. legacy 3.2 mm × 2.5 mm oscillators while maintaining thermal performance via wettable flanks. |
| Factory-Programmed Configuration | Fixed 40.000 MHz, LVCMOS, 3.3V supply, OE/ST pin function - eliminates configuration EEPROM, boot-time delays, and firmware dependencies. |
Applications
| Industrial PLC Timing | PCIe Gen 5 Reference Clock |
|---|---|
|
Use Scenario: Synchronized I/O scanning and motion control loop timing in modular programmable logic controllers. IC Role / Device Role / Timing Role: Primary system clock source for ARM Cortex-M7 MCU and real-time Ethernet PHYs. Use Value: ±25 ppm stability over –40°C to +105°C ensures deterministic cycle times across ambient temperature swings without software compensation. |
Use Scenario: Reference clock for PCIe Gen 5 root complex and endpoint devices in AI accelerator cards. IC Role / Device Role / Timing Role: Low-jitter 40 MHz LVCMOS clock feeding PCIe controller's reference input (REFCLK). Use Value: 350 fs typical RMS jitter at 100 MHz translates to sub-150 fs contribution at 40 MHz - well below PCIe Gen 5's 150 fs jitter limit. |
| FPGA Configuration Clock | Optical Transport Line Card |
|
Use Scenario: Bitstream loading and configuration clock for Xilinx Versal and Intel Agilex FPGAs in reconfigurable compute platforms. IC Role / Device Role / Timing Role: Single-ended LVCMOS clock driving FPGA CONFIG_CLK pin during power-up and partial reconfiguration. Use Value: <5 ms start-up time aligns with FPGA power sequencing requirements; 2.5V/3.3V compatibility avoids level-shifter components. |
Use Scenario: Local timing reference for 100G/400G coherent DSPs and forward error correction (FEC) ASICs in OTN line cards. IC Role / Device Role / Timing Role: Stable 40 MHz clock for digital signal processing clock domain synchronization and ADC/DAC sampling clocks. Use Value: Integrated LDO provides –72 dBc PSRR, enabling direct use of noisy intermediate bus rails without dedicated LDO stages. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fixed-frequency oscillator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Si510-40.000M-GR | 40 MHz LVCMOS, ±20 ppm stability, 3.3V only, 5 ms start-up, no integrated LDO (requires external regulation). | Lacks PSRR performance; unsuitable for noisy power domains without added filtering. | Select when cost sensitivity outweighs supply noise immunity needs and board space allows external LDO. |
| AK2-40.000MHZ-E | 40 MHz LVCMOS, ±50 ppm stability, –40°C to +85°C, 10 ms start-up, quartz-based, no LDO. | Higher aging drift and wider temp range spec - may require margining in extended-temp industrial deployments. | Choose only for non-critical timing where long-term stability and thermal robustness are secondary. |
Compared with Si510-40.000M-GR and AK2-40.000MHZ-E, LMK6CE04000CDLFR offers superior jitter (350 fs vs. ≥500 fs), tighter stability (±25 ppm vs. ±20/±50 ppm), and integrated LDO - making it optimal for PCIe Gen 5, high-reliability industrial, and compact optical module designs.
Availability
LMK6CE04000CDLFR is available at Aetrix Electronics and suitable for industrial PLCs, PCIe Gen 5 accelerator cards, FPGA configuration systems, and optical transport line cards requiring stable component supply across extended temperature and long product lifecycles.
Supply support for LMK6CE04000CDLFR 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 vertically integrated manufacturing including BAW resonator fabrication.
The LMK6x family is designed specifically for high-speed SERDES reference clocking in telecommunications, data center infrastructure, and industrial edge computing - replacing quartz oscillators with monolithic, programmable, and thermally robust alternatives.
FAQ
Is LMK6CE04000CDLFR pin-compatible with other LMK6C variants?
Yes - all LMK6C devices use identical 4-pin VSON (DLF-4 or DLE-4) packages and share the same pinout: Pin 1 (OE/ST/NC), Pin 2 (GND), Pin 3 (OUT), Pin 4 (VDD). Functionality differs only in factory-programmed parameters (frequency, voltage, control pin behavior), not physical layout.
What is the maximum capacitive load supported by the LVCMOS output?
The LMK6CE04000CDLFR LVCMOS output supports up to 15 pF for frequencies above 50 MHz and up to 30 pF for frequencies below 50 MHz. At 40 MHz, the 30 pF limit applies - sufficient for driving multiple FPGA clock inputs or short PCB traces without series termination.
Does this device require external configuration or firmware?
No - LMK6CE04000CDLFR is factory-programmed with fixed 40.000 MHz output, LVCMOS drive strength, 3.3V supply, and OE/ST pin functionality. It operates immediately after power-up with no I²C/SPI interface, EEPROM, or initialization sequence required.
Can the output be disabled to reduce system power consumption?
Yes - asserting Pin 1 (OE/ST) low disables the output and reduces current draw to 6–13 mA (standby mode). This feature enables dynamic power gating in battery-backed or energy-sensitive industrial applications without affecting oscillator core stability.
LMK6CE04000CDLFR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- LMK6x
- Package/Case:
- 4-VDFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Base Resonator:
- Silicon
- Type:
- XO (Standard)
- Frequency:
- 40 MHz
- Function:
- Enable/Disable
- Output:
- LVCMOS
- Voltage - Supply:
- 2.5V ~ 3.3V
- Frequency Stability:
- ±25ppm
- Absolute Pull Range (APR):
- -
- Operating Temperature:
- -40°C ~ 105°C
- Spread Spectrum Bandwidth:
- -
- Current - Supply (Max):
- 62mA
- 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)
LMK6CE04000CDLFR FAQ
1.How can I place an order for LMK6CE04000CDLFR through Aetrix?
Please submit a Request for Quotation (RFQ) for LMK6CE04000CDLFR 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 LMK6CE04000CDLFR reliable?
The price and inventory of LMK6CE04000CDLFR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMK6CE04000CDLFR is usually 5 days.
3.What payment methods are accepted for LMK6CE04000CDLFR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMK6CE04000CDLFR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMK6CE04000CDLFR?
LMK6CE04000CDLFR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMK6CE04000CDLFR 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 LMK6CE04000CDLFR?
For technical support, including LMK6CE04000CDLFR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMK6CE04000CDLFR requirements.
6.How does Aetrix verify that LMK6CE04000CDLFR is sourced from the original manufacturer or authorized distributors?
All LMK6CE04000CDLFR 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 LMK6CE04000CDLFR meets industry standards.
7.What is the process for return or replacement of LMK6CE04000CDLFR?
All LMK6CE04000CDLFR units undergo pre-shipment inspection (PSI). If there is an issue with LMK6CE04000CDLFR, 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 LMK6CE04000CDLFR part is unused and in its original packaging.
Return procedure for LMK6CE04000CDLFR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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