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LMK05318

ACTIVE

Ultra-low jitter single channel network synchronizer clock with BAW

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Data sheet

LMK05318

ACTIVE
Data sheet Order now

Product details

Function Clock network synchronizer Number of outputs 8 Output type CML, HCSL, LVCMOS, LVDS, LVPECL RMS jitter (fs) 50 Features I2C, Integrated EEPROM, Pin programmable, SPI Output frequency (min) (MHz) 0.000000000001 Output frequency (max) (MHz) 800 Input type LVCMOS, LVDS, LVPECL, XTAL Supply voltage (min) (V) 3.135 Supply voltage (max) (V) 3.465 Operating temperature range (°C) -40 to 85 Number of input channels 2
Function Clock network synchronizer Number of outputs 8 Output type CML, HCSL, LVCMOS, LVDS, LVPECL RMS jitter (fs) 50 Features I2C, Integrated EEPROM, Pin programmable, SPI Output frequency (min) (MHz) 0.000000000001 Output frequency (max) (MHz) 800 Input type LVCMOS, LVDS, LVPECL, XTAL Supply voltage (min) (V) 3.135 Supply voltage (max) (V) 3.465 Operating temperature range (°C) -40 to 85 Number of input channels 2
VQFN (RGZ) 48 49 mm² 7 x 7
  • Ultra-low jitter BAW VCO based Ethernet clocks
    • 32fs typical RMS jitter at 312.5MHz with 4MHz 1st order high-pass filter (HPF)
    • 44fs typical RMS jitter at 156.25MHz with 4MHz 1st order HPF
    • 50fs typical/ 80fs maximum RMS jitter at 312.5MHz
    • 60fs typical/ 90fs maximum RMS jitter at 156.25MHz
  • One high-performance Digital Phase-Locked Loop (DPLL) paired with two Analog Phase-Locked Loops (APLLs):
    • 1mHz to 4kHz programmable DPLL loop bandwidth
    • < 1ppt per step DCO adjustment for IEEE 1588 PTP clock steering
  • Two differential or single-ended DPLL inputs
    • 2MHz to 800MHz input frequency
    • Digital holdover and hitless switching
  • Eight differential outputs with programmable AC-LVPECL, AC-CML, AC-LVDS, HSCL, and 1.8V LVCMOS output formats.
    • 2MHz to 800MHz input frequency
    • PCIe Gen 1 to 6 compliant
  • I2C, 3-wire SPI, or 4-wire SPI
  • 3.3V core supply and 1.8V, 2.5V, or 3.3V output supply
  • –40°C to +85°C operating temperature
  • Ultra-low jitter BAW VCO based Ethernet clocks
    • 32fs typical RMS jitter at 312.5MHz with 4MHz 1st order high-pass filter (HPF)
    • 44fs typical RMS jitter at 156.25MHz with 4MHz 1st order HPF
    • 50fs typical/ 80fs maximum RMS jitter at 312.5MHz
    • 60fs typical/ 90fs maximum RMS jitter at 156.25MHz
  • One high-performance Digital Phase-Locked Loop (DPLL) paired with two Analog Phase-Locked Loops (APLLs):
    • 1mHz to 4kHz programmable DPLL loop bandwidth
    • < 1ppt per step DCO adjustment for IEEE 1588 PTP clock steering
  • Two differential or single-ended DPLL inputs
    • 2MHz to 800MHz input frequency
    • Digital holdover and hitless switching
  • Eight differential outputs with programmable AC-LVPECL, AC-CML, AC-LVDS, HSCL, and 1.8V LVCMOS output formats.
    • 2MHz to 800MHz input frequency
    • PCIe Gen 1 to 6 compliant
  • I2C, 3-wire SPI, or 4-wire SPI
  • 3.3V core supply and 1.8V, 2.5V, or 3.3V output supply
  • –40°C to +85°C operating temperature

The LMK05318 is high-performance network synchronizer and jitter cleaner designed to meet the stringent requirements of Ethernet-based networking applications.

The device integrates one DPLL and two APLLs to provide hitless switching and jitter attenuation using the programmable loop bandwidths (LBWs) with one external loop filter capacitor to maximize the flexibility and ease of use.

APLL1 features an ultra-high performance PLL with TI’s proprietary Bulk Acoustic Wave (BAW) technology in VCO1 and can generate 312.5MHz output clocks with 50fs typical RMS jitter (12kHz to 20MHz) irrespective of the DPLL reference input frequency and jitter characteristics. APLL2 features a conventional LC VCO to provide options for a second frequency and/or synchronization domain.

The integrated EEPROM can be used for custom system configurations on start-up. Internal LDO regulators provide excellent power supply noise rejection (PSNR) to reduce the cost and complexity of the power delivery network.

The LMK05318 is high-performance network synchronizer and jitter cleaner designed to meet the stringent requirements of Ethernet-based networking applications.

The device integrates one DPLL and two APLLs to provide hitless switching and jitter attenuation using the programmable loop bandwidths (LBWs) with one external loop filter capacitor to maximize the flexibility and ease of use.

APLL1 features an ultra-high performance PLL with TI’s proprietary Bulk Acoustic Wave (BAW) technology in VCO1 and can generate 312.5MHz output clocks with 50fs typical RMS jitter (12kHz to 20MHz) irrespective of the DPLL reference input frequency and jitter characteristics. APLL2 features a conventional LC VCO to provide options for a second frequency and/or synchronization domain.

The integrated EEPROM can be used for custom system configurations on start-up. Internal LDO regulators provide excellent power supply noise rejection (PSNR) to reduce the cost and complexity of the power delivery network.
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Technical documentation

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Top documentation Type Title Format options Date
* Data sheet LMK05318 1-DPLL 2-APLL 2-IN 8-OUT Network Synchronizer With BAW VCO for Ethernet-Based Networking Applications datasheet (Rev. B) PDF | HTML 10 Dec 2025
Application note Termination Guidelines for Differential and Single-Ended Signals PDF | HTML 10 Dec 2025
Technical article Solving synchronization challenges in Industrial Ethernet PDF | HTML 19 Jul 2019
User guide LMK05318 Registers (Rev. A) 08 Jul 2019
Technical article TI BAW resonator innovation puts time on your side PDF | HTML 05 Mar 2019
Technical article Are you ready for BAW? PDF | HTML 27 Feb 2019
Application note ITU-T G.8262 compliance test results for the LMK05318 (Rev. A) 22 Feb 2019
Application note Supported synchronization modes for TI network synchronizers (Rev. A) 22 Feb 2019
Application note Understanding clocking needs for high-speed 56G PAM-4 serial links (Rev. A) 22 Feb 2019
White paper TI BAW technology enables ultra-low jitter clocks for high-speed networks 17 Feb 2019
Application note How to use the LMK05318 as a jitter cleaner 16 Jan 2019

Design & development

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Support software

TICSPRO-SW — TICS Pro GUI and Live Programming Tool for Clocking Devices

Texas Instruments clocks and synthesizers (TICS) pro software is used to program the evaluation modules (EVMs) for product numbers with these prefixes: CDC, LMK and LMX. These products include phase-locked loops and voltage-controlled oscillators (PLL+VCO), synthesizers and clocking devices.

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Simulation model

LMK05318 IBIS Model

SNAM226.ZIP (137 KB) - IBIS Model
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CLOCK-TREE-ARCHITECT — Clock tree architect programming software

Clock tree architect is a clock tree synthesis tool that streamlines your design process by generating clock tree solutions based on your system requirements. The tool pulls data from an extensive database of clocking products to generate a system-level multi-chip clocking solution.
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PLLATINUMSIM-SW — PLLatinum Sim Tool

PLLATINUMSIM-SW is a simulation tool that allows users to create detailed designs and simulations of our PLLatinum™ integrated circuits, which include the LMX series of phase-locked loops (PLLs) and synthesizers.

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PSPICE-FOR-TI — PSpice® for TI design and simulation tool

PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
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