8T49N1012-003NLGI8

Overview

The 8T49N1012-003NLGI8 is a programmable clock generator belonging to the FemtoClock NG family manufactured by Renesas Electronics. It functions as a universal frequency translator and jitter attenuator designed for high-performance networking applications. The device integrates a fractional-feedback PLL and multiple output dividers to generate precise clock signals from various input references. It supports flexible output configurations including LVPECL, LVDS, HCSL, and LVCMOS levels, accommodating frequencies up to 1 GHz. The component is engineered to meet stringent jitter requirements for 10G to 25G Ethernet and SONET/SDH standards.

Feature Summary

• Generates up to 4 LVPECL/LVDS/HCSL or 16 LVCMOS output clocks ranging from 8kHz to 1.0GHz
• RMS phase jitter of 0.276ps (including spurs) from 12kHz to 20MHz
• Supports auto and manual input clock selection with hitless switching capabilities
• Register programmable via I2C interface or external I2C EEPROM

Applications

• 10G/40G/100G SONET/SDH network line cards
• Ethernet network line cards including GbE/10GbE/100GbE Synchronous Ethernet
• Wireless base station baseband units
• Carrier Ethernet switches and OTN equipment

Procurement Notes

Verify the specific ordering suffix -003NLGI8 against official Renesas documentation to confirm factory pre-programmed settings. Confirm current availability status as inventory levels fluctuate. Ensure compatibility with required output voltage levels and package specifications before procurement.

Selection Notes

Select this component when designing systems requiring low-jitter clock synthesis for high-speed serial links. Verify that the supported input formats (LVPECL, LVDS, HCSL, LVCMOS) match the system reference clocks. Check if the integrated PLL and divider architecture meets the specific frequency multiplication or division ratios required for the target application.

Part Context

This part is part of the 8T49N1012 series within the FemtoClock NG product line. It serves as a versatile timing solution for telecommunications and datacom infrastructure. The device replaces discrete clock generation components by integrating PLL, VCO, and fanout buffers into a single package, simplifying PCB layout and reducing bill of materials.

Replacement Considerations

Consult Renesas documentation for direct pin-to-pin replacements or functional equivalents within the 8T49N series. Verify that alternative parts support the same output count, jitter performance, and programming interface. Cross-reference electrical parameters to ensure compliance with existing design constraints.