8T49N524-008NLGI8

Overview

The Renesas 8T49N524-008NLGI8 is a dual four-output programmable clock generator utilizing fourth-generation FemtoClock NG PLL technology. It features eight selectable LVPECL or LVDS outputs and supports input frequencies from 5MHz to 800MHz via fundamental mode crystals (10MHz–40MHz) or differential references. The device generates two independent output frequencies ranging from 15.234MHz to 645MHz, and 975MHz to 1290MHz. Key electrical parameters include a VCO frequency of 1950MHz to 2580MHz, an RMS phase jitter of 0.282ps at 125MHz (12kHz–20MHz), and operation on full 2.5V or 3.3V power supplies within a -40°C to 85°C temperature range.

Feature Summary

• Dual independent fractional clock generators with up to three factory-programmed default configurations selectable via FSEL pins.
• Fourth-generation FemtoClock NG PLL technology delivering sub-0.5ps RMS phase jitter in integer divide mode.
• Eight differential outputs configurable as LVPECL or LVDS, supporting input levels including LVPECL, LVDS, and HCSL.
• I2C programming interface for dynamic frequency configuration and register access.

Applications

• High-speed serial communication systems requiring low jitter clock synthesis.
• Network infrastructure equipment utilizing multiple independent clock domains.
• Test and measurement instruments requiring precise frequency generation.

Procurement Notes

Verify the specific ordering suffix against the Programmable FemtoClock NG Product Ordering Guide to confirm factory-programmed frequencies and options. Confirm package availability and lead times directly with authorized distributors, as production status may vary.

Selection Notes

Select this component when dual independent clock outputs with fractional division are required. Ensure the target output frequencies fall within the specified ranges: 15.234MHz–645MHz or 975MHz–1290MHz. Verify that the input source matches the supported crystal or differential reference specifications.

Part Context

This part belongs to the IDT8T49N524I series, a line of dual four-output fractional clock generators. It is designed for applications demanding high-frequency flexibility and low phase noise, serving as a key timing solution in complex digital systems.

Replacement Considerations

Consult the official replacement guide for compatible alternatives. Verify pin compatibility and electrical specifications before substitution.

FAQ

What is the maximum VCO frequency for the 8T49N524?

The maximum VCO frequency is 2580 MHz.

Can the output style be changed dynamically?

Yes, the output style can be selected between LVPECL and LVDS using the I2C interface or by setting the LVDS_SEL bit.

How many default frequency configurations can be stored?

The device supports up to three different factory-programmed default frequency configurations, which can be selected using the FSEL control pins.