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LMK04368-EP

ACTIVE

Enhanced product ultra-low-noise 3.2-GHz JESD204C jitter cleaner

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Data sheet

LMK04368-EP

ACTIVE
Data sheet Order now

Product details

Number of input channels 3 Number of outputs 15 RMS jitter (fs) 54 Features 0 Delay, Integrated VCO, JESD204B, Loss of signal detection, Manual/auto switch, Programmable Delay, SPI Output frequency (max) (MHz) 3255 Output type CML, HSDS, LVCMOS, LVDS, LVPECL Input type HCSL, LVCMOS, LVDS, LVPECL Supply voltage (min) (V) 3.135 Supply voltage (max) (V) 3.465 Operating temperature range (°C) -55 to 125
Number of input channels 3 Number of outputs 15 RMS jitter (fs) 54 Features 0 Delay, Integrated VCO, JESD204B, Loss of signal detection, Manual/auto switch, Programmable Delay, SPI Output frequency (max) (MHz) 3255 Output type CML, HSDS, LVCMOS, LVDS, LVPECL Input type HCSL, LVCMOS, LVDS, LVPECL Supply voltage (min) (V) 3.135 Supply voltage (max) (V) 3.465 Operating temperature range (°C) -55 to 125
HTQFP (PAP) 64 144 mm² 12 x 12
  • VID#:V62/23612
  • Ambient temperature range: –55°C to 125°C
  • Maximum clock output frequency: 3255 MHz
  • Multi-mode: dual PLL, single PLL, and clock distribution
  • 6-GHz external VCO or distribution input
  • Ultra-low noise, at 2500 MHz:
    • 54-fs RMS jitter (12 kHz to 20 MHz)
    • 64-fs RMS jitter (100 Hz to 20 MHz)
    • –157.6-dBc/Hz noise floor
  • Ultra-low noise, at 3200 MHz:
    • 61-fs RMS jitter (12 kHz to 20 MHz)
    • 67-fs RMS jitter (100 Hz to 100 MHz)
    • –156.5-dBc/Hz noise floor
  • PLL2
    • PLL FOM of –230 dBc/Hz
    • PLL 1/f of –128 dBc/Hz
    • Phase detector rate up to 320 MHz
    • Two integrated VCOs: 2440 to 2600 MHz and 2945 to 3255 MHz
  • Up to 14 differential device clocks
    • CML, LVPECL, LCPECL, HSDS, LVDS, and 2xLVCMOS programmable outputs
  • Up to 1 buffered VCXO/XO output
    • LVPECL, LVDS, 2xLVCMOS programmable
  • 1-1023 CLKOUT divider
  • 1-8191 SYSREF divider
  • 25-ps step analog delay for SYSREF clocks
  • Digital delay and dynamic digital delay for device clocks and SYSREF
  • Holdover mode with PLL1
  • 0-delay with PLL1 or PLL2
  • High Reliability
    • Controlled Baseline
    • One Assembly/Test Site
    • One Fabrication Site
    • Extended Product Life Cycle
    • Extended Product-Change Notification
    • Product Traceability
  • VID#:V62/23612
  • Ambient temperature range: –55°C to 125°C
  • Maximum clock output frequency: 3255 MHz
  • Multi-mode: dual PLL, single PLL, and clock distribution
  • 6-GHz external VCO or distribution input
  • Ultra-low noise, at 2500 MHz:
    • 54-fs RMS jitter (12 kHz to 20 MHz)
    • 64-fs RMS jitter (100 Hz to 20 MHz)
    • –157.6-dBc/Hz noise floor
  • Ultra-low noise, at 3200 MHz:
    • 61-fs RMS jitter (12 kHz to 20 MHz)
    • 67-fs RMS jitter (100 Hz to 100 MHz)
    • –156.5-dBc/Hz noise floor
  • PLL2
    • PLL FOM of –230 dBc/Hz
    • PLL 1/f of –128 dBc/Hz
    • Phase detector rate up to 320 MHz
    • Two integrated VCOs: 2440 to 2600 MHz and 2945 to 3255 MHz
  • Up to 14 differential device clocks
    • CML, LVPECL, LCPECL, HSDS, LVDS, and 2xLVCMOS programmable outputs
  • Up to 1 buffered VCXO/XO output
    • LVPECL, LVDS, 2xLVCMOS programmable
  • 1-1023 CLKOUT divider
  • 1-8191 SYSREF divider
  • 25-ps step analog delay for SYSREF clocks
  • Digital delay and dynamic digital delay for device clocks and SYSREF
  • Holdover mode with PLL1
  • 0-delay with PLL1 or PLL2
  • High Reliability
    • Controlled Baseline
    • One Assembly/Test Site
    • One Fabrication Site
    • Extended Product Life Cycle
    • Extended Product-Change Notification
    • Product Traceability

The LMK04368-EP is a high performance clock conditioner with JEDEC JESD204B/C support for space applications.

The 14 clock outputs from PLL2 can be configured to drive seven JESD204B/C converters or other logic devices using device and SYSREF clocks. SYSREF can be provided using both DC and AC coupling. Not limited to JESD204B/C applications, each of the 14 outputs can be individually configured as high-performance outputs for traditional clocking systems.

This device can be configured for operation in dual PLL, single PLL, or clock distribution modes with or without SYSREF generation or reclocking. PLL2 may operate with either internal or external VCO.

The high performance combined with features like the ability to trade off between power and performance, dual VCOs, dynamic digital delay, and holdover allows to provide flexible high performance clocking trees.

The LMK04368-EP is a high performance clock conditioner with JEDEC JESD204B/C support for space applications.

The 14 clock outputs from PLL2 can be configured to drive seven JESD204B/C converters or other logic devices using device and SYSREF clocks. SYSREF can be provided using both DC and AC coupling. Not limited to JESD204B/C applications, each of the 14 outputs can be individually configured as high-performance outputs for traditional clocking systems.

This device can be configured for operation in dual PLL, single PLL, or clock distribution modes with or without SYSREF generation or reclocking. PLL2 may operate with either internal or external VCO.

The high performance combined with features like the ability to trade off between power and performance, dual VCOs, dynamic digital delay, and holdover allows to provide flexible high performance clocking trees.
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Technical documentation

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* Data sheet LMK04368-EP Ultra-Low-Noise JESD204B/C Dual-Loop Clock Jitter Cleaner datasheet PDF | HTML 01 May 2023
* Radiation & reliability report LMK04368-EP Reliability Report PDF | HTML 04 Apr 2025
* Radiation & reliability report LMK04368-EP Enhanced Product Qualification and Reliability Report PDF | HTML 25 Apr 2023
Application note Practical Clocking Considerations That Give Your Next High-Speed Converter Design an Edge (Rev. A) PDF | HTML 11 Apr 2025

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Evaluation board

LMK04368EPEVM — LMK04368-EP evaluation module for JESD204B/C dual-loop clock jitter cleaner

The LMK04368-EP evaluation module (EVM) is a platform to evaluate the performance and features of the LMK04368-EP, which is am enhanced-product, high-performance, ultra-low-noise, JESD204B/C, dual-loop clock jitter cleaner.

The LMK04368-EP device on each EVM is an engineering model, intended for (...)

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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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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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