8T49N488A-999ASGI

Overview

The 8T49N488A-999ASGI is a quad PLL clock generator utilizing FemtoClock NG technology, designed for networking and communication applications. It integrates low-phase noise frequency translation, jitter attenuation, and alarm monitoring functions. The device features four fully independent PLLs capable of generating programmable output frequencies ranging from 0.98 MHz to 1,300 MHz. It supports differential inputs including LVPECL, LVDS, LVHSTL, and HCSL with input frequencies from 8 kHz to 710 MHz. Key electrical parameters include an RMS phase jitter of 465 fs (typical) in Low Bandwidth mode and 333 fs (typical) in Synthesizer mode. It operates on a full 2.5V ± 5% supply within a -40°C to 85°C ambient temperature range.

Feature Summary

• Quad PLL architecture with four fully independent phase-locked loops
• FemtoClock NG technology for low-phase noise performance
• Programmable output frequencies from 0.98 MHz to 1,300 MHz
• Supports I²C serial interface for register programming

Applications

• Networking equipment requiring precise timing
• Communication systems needing jitter attenuation
• Test and measurement instrumentation

Procurement Notes

Verify the specific suffix '999ASGI' against official Renesas documentation to confirm factory pre-programming settings, as order codes define internal register configurations. Confirm current product status, as similar devices in this family may have discontinuation notices. Ensure compatibility with required input/output voltage levels and package dimensions before procurement.

Selection Notes

Select this component when four independent clock outputs are required from a single device. Compare RMS phase jitter specifications against application requirements, noting differences between Low Bandwidth and Synthesizer modes. Verify that the 2.5V supply voltage aligns with system power rails. Check if the 10mm x 10mm CABGA package fits the PCB layout constraints.

Part Context

This part belongs to the 8T49N4xxI series of Universal Frequency Translators. Other family members include dual-PLL (8T49N244I), tri-PLL (8T49N366I), and quad PLL variants. These devices share common FemtoClock NG technology and packaging options but differ in the number of integrated PLLs and output channels.

Replacement Considerations

Direct replacements within the same family include other 8T49N4xxI quad PLL devices. Verify pinout and register compatibility when substituting. Cross-reference with updated Renesas ordering guides for any package or feature changes.