8T49N105A-005NLGI8

Overview

The Renesas Electronics 8T49N105A-005NLGI8 is a FemtoClock NG Universal Frequency Translator (UFT) and synthesizer. It generates output frequencies from 0.98MHz to 1300MHz using a single differential input or crystal source. The device supports LVDS or LVPECL outputs in a 40-lead VFQFN package. Key electrical parameters include a core supply voltage of 2.5V to 3.3V, an operating temperature range of -40°C to 85°C, and an input frequency range of 8kHz to 710MHz. It features two factory-programmed configurations stored in OTP memory.

Feature Summary

• Universal Frequency Translator with three modes: Low-Bandwidth Jitter Attenuation, High-Bandwidth Translation, and Synthesizer.
• Single differential output pair (Q, nQ) programmable as LVDS or LVPECL.
• Two factory-set register configurations for power-up defaults, selectable via CONFIG pin or I2C.
• Integrated alarm monitoring including LOCK_IND, HOLDOVER, CLK_BAD, and XTAL_BAD status indicators.

Applications

• Networking and communications equipment requiring jitter attenuation.
• PCI Express and computing systems utilizing high-bandwidth frequency translation.
• General-purpose clock synthesis from fundamental mode crystals.

Procurement Notes

Verify the component status as End-of-Life (EOL) through official manufacturer channels before procurement planning. Confirm that the specific ordering suffix corresponds to the required package and configuration settings. Ensure compatibility with existing design constraints regarding the 40-lead VFQFN footprint and supply voltage requirements.

Selection Notes

Select this component when a single-output UFT with low phase noise is required. Choose between LVDS and LVPECL based on downstream receiver interface standards. Utilize the I2C interface for dynamic reconfiguration if factory OTP settings are insufficient for multiple application variants. Ensure the input reference frequency falls within the 8kHz to 710MHz range for translator modes.

Part Context

This part belongs to the IDT8T49N105I FemtoClock NG family. It is manufactured by Renesas Electronics Corporation, formerly Integrated Device Technology (IDT). The device is designed for high-performance clock generation and translation in demanding networking and computing environments.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. As the device is listed as End-of-Life, consult the manufacturer for recommended next-generation replacements or alternative families with similar specifications.