LMK5B12212

ACTIVO

Sincronizador de red con 12 salidas, 1 DPLL y 2 APLL, fluctuación ultrabaja y VCO BAW de 2.5 GHz int

Detalles del producto

Function Clock network synchronizer Number of outputs 12 Output type CML, LVCMOS, LVDS, LVPECL RMS jitter (fs) 47 Features JESD204B Output frequency (min) (MHz) 0.000000000001 Output frequency (max) (MHz) 1250 Input type HCSL, 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 12 Output type CML, LVCMOS, LVDS, LVPECL RMS jitter (fs) 47 Features JESD204B Output frequency (min) (MHz) 0.000000000001 Output frequency (max) (MHz) 1250 Input type HCSL, 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 (RGC) 64 81 mm² 9 x 9
  • Ultra-low jitter BAW VCO based Ethernet clocks
    • 13fs typical RMS jitter at 625MHz with 4MHz 1st order high-pass filter (HPF)
    • 24fs typical RMS jitter at 312.5MHz with 4MHz 1st order HPF
    • 42fs typical/ 60fs maximum RMS jitter at 312.5MHz
    • 47fs typical/ 65fs maximum RMS jitter at 156.25MHz
  • 1 high-performance Digital Phase Locked Loop (DPLL) with 2 Analog Phase Locked Loops (APLLs)

    • Programmable DPLL loop filter bandwidth from 1mHz to 4kHz
    • < 1ppt DCO frequency adjustment step size
  • 2 differential or single-ended DPLL inputs
    • 1Hz (1PPS) to 800MHz input frequency
    • Digital Holdover and Hitless Switching
  • 12 differential outputs with programmable HSDS, AC-LVPECL, LVDS and HSCL formats
    • Up to 16 total frequency outputs when configured with 6 LVCMOS frequency outputs on OUT0_P/N, OUT1_P/N, GPIO1 and GPIO2 and 10 differential outputs on OUT2_P/N to OUT11_P/N
    • 1Hz (1PPS) to 1250MHz output frequency with programmable swing and common mode
    • PCIe Gen 1 to 6 compliant
  • I2C or 3-wire/4-wire SPI
  • Ultra-low jitter BAW VCO based Ethernet clocks
    • 13fs typical RMS jitter at 625MHz with 4MHz 1st order high-pass filter (HPF)
    • 24fs typical RMS jitter at 312.5MHz with 4MHz 1st order HPF
    • 42fs typical/ 60fs maximum RMS jitter at 312.5MHz
    • 47fs typical/ 65fs maximum RMS jitter at 156.25MHz
  • 1 high-performance Digital Phase Locked Loop (DPLL) with 2 Analog Phase Locked Loops (APLLs)

    • Programmable DPLL loop filter bandwidth from 1mHz to 4kHz
    • < 1ppt DCO frequency adjustment step size
  • 2 differential or single-ended DPLL inputs
    • 1Hz (1PPS) to 800MHz input frequency
    • Digital Holdover and Hitless Switching
  • 12 differential outputs with programmable HSDS, AC-LVPECL, LVDS and HSCL formats
    • Up to 16 total frequency outputs when configured with 6 LVCMOS frequency outputs on OUT0_P/N, OUT1_P/N, GPIO1 and GPIO2 and 10 differential outputs on OUT2_P/N to OUT11_P/N
    • 1Hz (1PPS) to 1250MHz output frequency with programmable swing and common mode
    • PCIe Gen 1 to 6 compliant
  • I2C or 3-wire/4-wire SPI

The LMK5B12212 is a high-performance network synchronizer and jitter cleaner designed to meet the stringent requirements of ethernet-based networking applications with < 5ns timing accuracy (class D).

The network synchronizer integrates a DPLL to provide hitless switching and jitter attenuation with programmable loop bandwidth (LBW) and no external loop filters, maximizing flexibility and ease of use. The DPLL phase locks an integrated APLL to the provided reference input.

APLL1 features an ultra high performance PLL with TI’s proprietary Bulk Acoustic Wave (BAW) technology (known as the BAW APLL) and can generate 312.5MHz output clocks with 42fs typical / 60fs maximum RMS jitter irrespective of the DPLL reference input frequency and jitter characteristics. APLL2 provides for a second frequency and/or synchronization domain.

Reference validation circuitry monitors the DPLL reference clocks and performs a hitless switch between inputs upon detecting a switchover event. Zero-Delay Mode (ZDM) and phase cancellation can be enabled to control the phase relationship from input to outputs.

The device is fully programmable through I2C or SPI. The integrated EEPROM can be used to customize system start-up clocks. The device also features factory default ROM profiles as fallback options.

The LMK5B12212 is a high-performance network synchronizer and jitter cleaner designed to meet the stringent requirements of ethernet-based networking applications with < 5ns timing accuracy (class D).

The network synchronizer integrates a DPLL to provide hitless switching and jitter attenuation with programmable loop bandwidth (LBW) and no external loop filters, maximizing flexibility and ease of use. The DPLL phase locks an integrated APLL to the provided reference input.

APLL1 features an ultra high performance PLL with TI’s proprietary Bulk Acoustic Wave (BAW) technology (known as the BAW APLL) and can generate 312.5MHz output clocks with 42fs typical / 60fs maximum RMS jitter irrespective of the DPLL reference input frequency and jitter characteristics. APLL2 provides for a second frequency and/or synchronization domain.

Reference validation circuitry monitors the DPLL reference clocks and performs a hitless switch between inputs upon detecting a switchover event. Zero-Delay Mode (ZDM) and phase cancellation can be enabled to control the phase relationship from input to outputs.

The device is fully programmable through I2C or SPI. The integrated EEPROM can be used to customize system start-up clocks. The device also features factory default ROM profiles as fallback options.

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Documentación técnica

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Documentación principal Tipo Título Opciones de formato Fecha
* Data sheet LMK5B12212 1-DPLL 2-APLL 2-IN 12-OUT Network Synchronizer With BAW VCO for Ethernet-Based Networking Applications datasheet PDF | HTML 21 nov 2024
Application note Termination Guidelines for Differential and Single-Ended Signals PDF | HTML 10 dic 2025
User guide LMK5B12212 Programmer's Guide (Rev. A) PDF | HTML 17 nov 2025
Application note Oscillator Power Considerations for PLL Devices PDF | HTML 30 oct 2025
Certificate LMK5B12212EVM EU Declaration of Conformity (DoC) 29 sep 2023

Diseño y desarrollo

Para conocer los términos adicionales o los recursos necesarios, haga clic en cualquier título de abajo para ver la página de detalles cuando esté disponible.

Placa de evaluación

LMK5B12212EVM — Módulo de evaluación LMK5B12212

El módulo de evaluación (EVM) LMK5B12212 es para el generador y sincronizador de reloj de red LMK5B12212. El EVM se puede utilizar para la evaluación de dispositivos, pruebas de conformidad y creación de prototipos de sistemas.  El LMK5B12212 integra tres bucles de fase bloqueada analógicos (APLL) (...)

Guía del usuario: PDF | HTML
Soporte de software

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Modelo de simulación

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Herramienta de diseño

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Pedidos y calidad

Información incluida:
  • RoHS
  • REACH
  • Marcado del dispositivo
  • Acabado de plomo/material de la bola
  • Clasificación de nivel de sensibilidad a la humedad (MSL)/reflujo máximo
  • Estimaciones de tiempo medio entre fallas (MTBF)/fallas en el tiempo (FIT)
  • Contenido del material
  • Resumen de calificaciones
  • Monitoreo continuo de confiabilidad
Información incluida:
  • Lugar de fabricación
  • Lugar de ensamblaje

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Soporte y capacitación

Foros de TI E2E™ con asistencia técnica de los ingenieros de TI

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