8T49N524-008NLGI

Overview

The IDT8T49N524I 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 for Clock Generator A.
• Fourth-generation FemtoClock NG PLL technology delivering sub-0.5ps RMS phase jitter in integer divide mode.
• Flexible input options supporting fundamental mode crystals (10MHz–40MHz) or differential LVPECL/LVDS/HCSL references (5MHz–800MHz).
• Eight outputs configurable as LVPECL or LVDS, with I2C programming interface and hardware FSEL pin selection.

Applications

• High-performance networking equipment requiring low-jitter clock distribution.
• Telecommunications systems utilizing synchronous Ethernet or SONET/SDH standards.
• Data communication infrastructure needing multiple independent frequency synthesis channels.

Procurement Notes

Verify the specific order code suffix to confirm programmed default frequencies, output styles, and enable states, as these are factory-configured. Confirm RoHS 6 compliance and lead-free packaging status. Ensure the required voltage domain (2.5V or 3.3V) matches the selected configuration options available in the ordering guide.

Selection Notes

Select based on required output frequencies and voltage levels; note that LVPECL outputs require compatible supply voltages (e.g., 3.3V core with 3.3V or 2.5V outputs). Use the IDT8T49N524I Configuration Software to determine register settings for desired frequencies. Consider FSEL pin requirements if hardware switching between pre-programmed configurations is needed.

Part Context

This component belongs to the FemtoClock NG family of programmable clock generators. It shares architectural similarities with other devices in the series but is distinct in its dual-generator architecture and specific output count. It serves as a solution for applications requiring multiple independent clock domains from a single reference source.

Replacement Considerations

Publicly confirmed substitute part numbers are not provided in the verified source material. Consult the manufacturer's product ordering guide or application engineering support for potential cross-references or next-generation replacements.