8T49N366A-999ASGI8

Overview

The 8T49N366A-999ASGI8 is a FemtoClock NG Universal Frequency Translator manufactured by Renesas Electronics. It integrates three fully independent Phase-Locked Loops (PLLs) for low-phase noise frequency translation and jitter attenuation. The device supports input frequencies from 8 kHz to 710 MHz and generates programmable outputs ranging from 0.98 MHz to 1,300 MHz. Outputs are configurable as LVPECL or LVDS. It operates on a single 2.5 V supply within an ambient temperature range of -40 °C to +85 °C. The component is housed in a lead-free 10 mm x 10 mm CABGA package with 80 leads.

Feature Summary

• Integrates three fully independent PLLs supporting Frequency Synthesizer and High/Low-Bandwidth Frequency Translator modes
• Programmable output frequencies from 0.98 MHz up to 1,300 MHz with RMS phase jitter as low as 333 fs
• Supports multiple differential input types including LVPECL, LVDS, LVHSTL, and HCSL via I²C serial interface
• Features smooth reference switching and fractional-N PLL technology for networking applications

Applications

• Networking and communications equipment requiring precise clock synthesis
• Synchronous Ethernet line cards preserving G.8262 compliance
• Test and measurement instrumentation
• Carrier Ethernet switches and OTN systems

Procurement Notes

Verify the specific suffix '999' against official Renesas documentation to confirm factory pre-programmed configuration settings. Confirm current lifecycle status, as related devices in this family have received End-of-Life notifications. Ensure compatibility with I²C programming interfaces and required external components for the 2.5 V core voltage operation.

Selection Notes

Select this component when three independent clock domains are required from a single package. Compare RMS phase jitter specifications (465 fs typical in Low Bandwidth mode vs. 333 fs in Integer FB mode) against system requirements. Verify that the 10 mm x 10 mm CABGA footprint fits the PCB layout constraints and that the 2.5 V supply voltage aligns with the target power architecture.

Part Context

This part belongs to the 8T49N366I Universal Frequency Translator family. Related family members include the dual PLL device 8T49N244I and quad PLL devices such as the 8T49N445I and 8T49N488I. These devices share common FemtoClock NG technology features but differ in the number of integrated PLLs and output channels.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material. Evaluate other members of the 8T49N366I family or the broader 8T49N2xx/4xx series if pin-out and feature compatibility can be verified through official datasheets.