8T49N488A-999ASGI8

Overview

The Renesas 8T49N488A-999ASGI8 is a FemtoClock NG Universal Frequency Translator (UFT) clock synthesizer. It integrates four independent PLLs to generate up to eight differential output clocks from five input sources. The device supports fractional-N synthesis and features low phase jitter performance, typically around 300 fs RMS for specific configurations. It operates within a supply voltage range of 2.375V to 2.625V for the core and accepts inputs in LVCMOS, LVTTL, HCSL, LVHSTL, LVDS, or LVPECL formats. Outputs are configurable as LVDS or LVPECL. The component is housed in an 80-pin CABGA package with dimensions of 10x10 mm.

Feature Summary

• Four independent PLLs supporting up to eight differential outputs
• Fractional-N PLL architecture for flexible frequency generation
• Low phase jitter performance suitable for high-speed serial links
• Supports multiple input/output signaling standards including LVDS and LVPECL

Applications

• High-speed networking equipment requiring precise clock distribution
• Telecommunications infrastructure utilizing GR.1244 Stratum standards
• Data center interconnects and server backplanes
• Storage area networks (SAN) and enterprise storage systems

Procurement Notes

Verify the specific suffix '999ASGI8' against official Renesas documentation to confirm pinout, packaging, and electrical characteristics. Ensure compatibility with existing board layouts regarding the 80-CABGA footprint. Check for any product change notifications (PCN) or end-of-life (EOL) notices that may affect long-term availability. Confirm moisture sensitivity level (MSL) handling requirements during assembly.

Selection Notes

Select this component when multiple independent clock domains are required from a single package. Compare phase jitter specifications against target application requirements, such as PCIe or Ethernet standards. Verify input frequency ranges match available reference clocks. Consider power consumption differences between LVDS and LVPECL output configurations. Evaluate thermal dissipation capabilities within the 80-LBGA package for the specific operating environment.

Part Context

This part belongs to the Renesas FemtoClock NG UFT family, designed for universal frequency translation. It succeeds earlier IDT clock generator lines following the Renesas acquisition. The 8T49N4xx series generally offers multi-output solutions for complex system timing needs. It is distinct from simpler single-output synthesizers like the 8T49N2xx series.

Replacement Considerations

Direct replacements include other variants within the 8T49N488A family with different suffixes for packaging or temperature grades. Cross-family substitutes may include the 8T49N445I for quad-output applications, though pinouts and features may differ. Always verify functional equivalence through detailed datasheet comparison before substitution.