LTC6953IUKG#TRPBF

Clock Generators, PLLs, Frequency Synthesizers Overview

The LTC6953IUKG#TRPBF is a high-performance, ultralow jitter clock distribution integrated circuit manufactured by Analog Devices. It features eleven independent outputs capable of generating JESD204B/C Subclass 1 SYSREF signals or general-purpose clocks. The device supports input frequencies up to 4.5GHz with additive output jitter less than 6fs RMS (12kHz to 20MHz integration bandwidth) and 65fs RMS via the ADC SNR method. Each output includes programmable frequency dividers, coarse digital delays, and fine analog delays for precise phase alignment. It utilizes EZSync™ and ParallelSync™ protocols for multichip synchronization and operates within a junction temperature range of –40°C to 125°C in a 52-lead QFN package.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Ultralow jitter performance: <6fs RMS additive jitter at 4.5GHz (12kHz–20MHz BW).
• Eleven independent low-noise CML outputs with individual programmable dividers and delays.
• Supports JESD204B/C Subclass 1 SYSREF generation and flexible clock/SYSREF configuration.
• EZSync™ and ParallelSync™ multichip synchronization capabilities.

Clock Generators, PLLs, Frequency Synthesizers Applications

• High-performance data converter clocking
• JESD204B/C Subclass 1 SYSREF signal generation
• Wireless infrastructure systems
• Test and measurement equipment

Clock Generators, PLLs, Frequency Synthesizers Procurement Notes

Verify the ordering suffix #TRPBF indicates tape and reel packaging when sourcing this component. Confirm the I grade designation corresponds to the specified –40°C to 125°C operating junction temperature range. Ensure compatibility with the 52-lead 7mm × 8mm plastic QFN footprint during procurement planning.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select the LTC6953IUKG#TRPBF for applications requiring precise phase alignment across multiple high-speed converters. The device supports up to five JESD204B/C clock/SYSREF pairs plus one general-purpose output. Utilize the LTC6952Wizard software tool for design configuration. Ensure PCB layout adheres to thermal requirements, specifically soldering the exposed pad to the ground plane.

Clock Generators, PLLs, Frequency Synthesizers Part Context

The LTC6953 is part of Analog Devices' clock distribution family designed for JESD204B/C compliance. It complements devices like the LTC6952 and LTC6955 for expanded output counts. The IUKG package variant provides a compact 52-lead QFN form factor suitable for dense board layouts. This specific part number denotes the industrial temperature grade version supplied in tape and reel format.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Evaluate alternative clock distributors based on output count, jitter specifications, and JESD204B/C support if substitution is required.

Clock Generators, PLLs, Frequency Synthesizers FAQ

What is the maximum input frequency supported by the LTC6953?

The LTC6953 supports an input frequency range up to 4500 MHz (4.5 GHz).

How many outputs can be configured as SYSREF signals?

The device can be configured as up to five JESD204B/C Subclass 1 device clock/SYSREF pairs plus one general-purpose output, totaling six synchronized outputs, or all eleven outputs can serve as general-purpose clocks.

What synchronization protocols does the LTC6953 support?

The LTC6953 supports EZSync™ and ParallelSync™ multichip synchronization protocols to align multiple devices.