8T49N445-999ASGI8

Overview

The 8T49N445-999ASGI8 is a quad Universal Frequency Translator (UFT) from the FemtoClock NG family, manufactured by Renesas Electronics. It integrates four independent PLLs for frequency translation and jitter attenuation within a single package. The device supports input frequencies ranging from 0.008 MHz to 710 MHz and generates output frequencies between 0.98 MHz and 1300 MHz. Key electrical parameters include a maximum peak-to-peak jitter of 40 ps and a typical RMS phase jitter of 333 fs in integer feedback mode. It operates on a 2.5 V supply with an ambient temperature range of -40°C to +85°C, housed in an 80-pin CABGA package.

Feature Summary

• Quad PLL architecture with fully independent loops for flexible clock generation
• Low-phase noise performance with 40 ps max peak-to-peak jitter
• Supports multiple input types including LVPECL, LVDS, LVHSTL, HCSL, LVCMOS, and LVTTL
• Features smooth reference switching and fractional-N PLL capabilities

Applications

• Networking and communications equipment requiring precise timing
• Carrier Ethernet switches and line cards
• SONET/SDH and OTN infrastructure
• Test and measurement instruments

Procurement Notes

This component is identified as obsolete or end-of-life. Verification of current availability requires checking specific distributor status, as standard production may have ceased. Users should confirm the moisture sensitivity level (MSL 3) and lead-free RoHS compliance before procurement planning.

Selection Notes

Select this model when four independent clock outputs are required from a single source. Ensure the design accommodates the 80-LBGA (10x10 mm) package dimensions. Verify that the required output frequencies fall within the 0.98 MHz to 1300 MHz range and that the input signal types match the supported LVPECL/LVDS options.

Part Context

The 8T49N445I series belongs to the FemtoClock NG Universal Frequency Translator family. Related devices in this ecosystem include the dual PLL 8T49N244I, tri-PLL 8T49N366I, and quad PLL 8T49N488I, offering varying channel counts for different system complexity levels.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Due to the end-of-life status, alternative sourcing must rely on third-party distributors or compatible family members like the 8T49N488I if additional channels are acceptable.