LMK03328RHSR

Clock Generators, PLLs, Frequency Synthesizers Overview

The LMK03328RHSR is an ultra-low jitter clock generator featuring two independent fractional-N frequency synthesizers with integrated VCOs, eight programmable outputs, and on-chip EEPROM. It operates within a supply voltage range of 3.135 V to 3.465 V for digital blocks and supports output drivers at 1.7 V to 3.465 V. The device accepts reference inputs from 1 MHz to 300 MHz or crystals between 10 MHz and 52 MHz, generating output frequencies up to 1 GHz. It provides typical RMS jitter of 100 fs for frequencies above 100 MHz and includes power supply noise rejection capabilities.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Dual independent PLLs with integrated VCOs for flexible clock generation
• Eight universal output pairs supporting AC-LVPECL, AC-LVDS, AC-CML, HCSL, and LVCMOS formats
• On-chip EEPROM storing 71 pin-selectable default startup configurations
• Frequency margining options using pullable crystal references and glitchless coarse dividers

Clock Generators, PLLs, Frequency Synthesizers Applications

• Switches and Routers
• Network and Telecom Line Cards
• Servers and Storage Systems
• Wireless Base Stations
• PCIe Gen1 through Gen6 interfaces

Clock Generators, PLLs, Frequency Synthesizers Procurement Notes

Verify the specific suffix 'RHS' corresponds to the 48-WQFN package variant when sourcing. Confirm that the ordering part number matches the required configuration mode, as the EEPROM stores default states but register programming may be necessary for custom setups. Ensure compatibility with the 3.3 V core and variable output driver voltages during component selection.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this component when dual independent synthesizers are required to drive separate clock domains with minimal cross-talk. The integrated EEPROM simplifies boot-up sequences by removing external configuration memory requirements. Consider the thermal performance metrics if operating in high-airflow environments, as junction-to-ambient resistance varies significantly with airflow conditions.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This device belongs to Texas Instruments' PLLatinum family of ultra-low jitter clock generators. It serves as a central clock distribution hub, replacing multiple discrete oscillators and buffers to reduce board area and bill of materials cost. The LMK03328 is designed for high-speed serial links where low phase noise and robust power supply immunity are critical for maintaining signal integrity.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

LMK03318RHST: Single PLL version with similar output count but limited input flexibility.