8T49N445-000ASGI8

Overview

The 8T49N445-000ASGI8 is a quad universal frequency translator from the FemtoClock NG family, manufactured by Renesas Electronics. It integrates four independent phase-locked loops (PLLs) capable of generating output frequencies ranging from 0.98 MHz to 1.3 GHz. The device supports multiple input types including LVPECL, LVDS, and HCSL, with an input frequency range of 8 kHz to 710 MHz. Key electrical specifications include a maximum peak-to-peak jitter of 40 ps and typical RMS phase jitter of 465 fs in low-bandwidth mode. It operates on a 2.5 V supply within an ambient temperature range of -40°C to 85°C.

Feature Summary

• Quad PLL architecture with fully independent synthesizers
• Output frequency range: 0.98 MHz to 1.3 GHz
• Low phase jitter: 40 ps max P-P, 465 fs typ RMS
• Supports smooth reference switching between redundant inputs

Applications

• Networking equipment clock distribution
• Telecommunications base stations
• High-speed data converter timing
• Test and measurement instrumentation

Procurement Notes

This component is classified as obsolete or end-of-life. Verification of current availability requires checking distributor stock status directly. Last known production change notifications indicate discontinuation events around mid-2025. Designers should confirm final last-time-buy dates with authorized suppliers before committing to procurement plans.

Selection Notes

Select this part for applications requiring four independent clock outputs with high-frequency flexibility up to 1.3 GHz. Ensure input signal compatibility with supported formats like LVPECL or LVDS. Verify that the 2.5 V core voltage requirement aligns with the system power budget. Consider the 80-pin CABGA package dimensions for PCB layout constraints.

Part Context

The 8T49N445I series belongs to Renesas' FemtoClock NG universal frequency translators. It complements other family members such as the dual-PLL 8T49N244I and tri-PLL 8T49N366I. These devices are designed for high-performance clock generation and jitter attenuation in complex digital systems requiring precise timing synchronization across multiple domains.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Due to the obsolete status, alternative solutions may require evaluating newer generations of clock generators or multi-PLL synthesizers from the same manufacturer with updated packaging or feature sets.