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Optical network terminal unit (ONT)

Products and reference designs
Block diagram

Optical network terminal unit (ONT)

Block diagram

Overview

Our integrated circuits and reference designs help you create optical network terminal (ONT) units that enable high-speed data connections for today's passive optical networks. Use the resources below to design a system with our most advanced microcontroller, interface and power delivery technologies.

Design requirements

Modern ONT units often require:

  • An RF transceiver with integrated microcontroller for 802.11 standard compliance.
  • Gigabit Ethernet link for high-speed data connections.
  • Efficient, low-standby Power over Ethernet (PoE) pass-through to power peripheral devices.

Block diagram

Find products and reference designs for your system.

Optical network terminal unit (ONT)

RGMII/SMGII RGMII/SMGII 12V 12V PCIe or IQ PCIe or IQ PCIe or IQ PCIe or IQ UART UART USB USB I2C or GPIO I2C or GPIO I2C I2C Console Console 1G/2.5G/10G/25G 1G/2.5G/10G/25G UART UART Optical Input Optical Input Sensing Sensing Temp sense Temp sense Humidity sense Humidity sense Clocking Clocking Oscillator Oscillator Crystal Crystal Clock buffer Clock buffer PON PON ESD ESD Voltage level shift Voltage level shift Optical module Optical module RS-232 RS-232 RS-232 RS-232 Processing Processing I2C switch I2C switch Little logic Little logic I2C level shifters, buffers, and hubs I2C level shifters, buffers, and hubs Comparators Comparators I2C general purpose I/O I2C general purpose I/O OPA OPA CPU CPU Flash Flash DDR DDR Analog switches/muxes Analog switches/muxes 4x4 radio front end 4x4 radio front end 4x4 dual band radio 4x4 dual band radio WiFi front end module WiFi front end module 4x4 dual band radio 4x4 dual band radio WiFi front end module WiFi front end module Analog switches Analog switches ESD ESD Zigbee Zigbee Zigbee Zigbee Gigabit LAN ports (with POE passthrough) Gigabit LAN ports (with POE passthrough) Ethernet PHY Ethernet PHY ESD ESD PoE PSE PoE PSE LED driver LED driver LED driver LED driver USB USB USB ESD USB ESD USB current limit switch USB current limit switch USB type-C and power delivery USB type-C and power delivery Non-isolated POL power Non-isolated POL power DC/DC buck converter DC/DC buck converter LDO LDO DDR memory power solutions DDR memory power solutions Current sensing Current sensing Voltage supervisor/reset IC Voltage supervisor/reset IC FETs FETs

Clocking

close

The clocking subsystem includes the oscillator and buffer used within the Optical network terminal as well as the crystal.

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Clocks & timing (6)
Oscillators
  • CDC6C—Low-power, low-jitter, bulk-acoustic-wave (BAW), fixed-frequency LVCMOS oscillator
    Data sheet: PDF | HTML
  • LMK6D—Low-jitter, high-performance, bulk-acoustic-wave (BAW) fixed-frequency LVDS oscillator
    Data sheet: PDF | HTML
  • LMK6P—Low-jitter, high-performance, bulk-acoustic-wave (BAW) fixed-frequency LVPECL oscillator
    Data sheet: PDF | HTML
Clock generators
  • CDCM6208—2:8 ultra-low power, low jitter clock generator
    Data sheet: PDF | HTML
Clock buffers

    Technical documentation

    View all 8
    No results found. Please clear your search and try again.
    Type Title Date
    Application note Programming Fun Lights With TI's TCA6507 30 Nov 2007
    Analog Design Journal System telemetry: What, why and how? 30 Apr 2014
    Application brief DACx1416 Delivers Optimized Solution to Mach Zehnder Modulator Biasing 29 Jun 2018
    Application note Why, When, and How to use I2C Buffers 16 Jul 2018
    Application note Digital Interfaces for Current Sensing Devices (Rev. A) PDF | HTML 08 May 2022
    Application brief Integrating the Current Sensing Resistor (Rev. D) PDF | HTML 07 Apr 2023
    Application note Choosing the Correct I2C Device for New Designs PDF | HTML 03 Jul 2018
    Application brief High-Density DACs Offer Superior Noise And Accuracy for Laser Drive Applications 02 Oct 2018

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