8T49N241-998NLGI#

Overview

The Renesas 8T49N241-998NLGI is a FemtoClock NG Universal Frequency Translator featuring one fractional-feedback PLL and four output dividers. It generates up to four independent clocks from 8kHz to 1GHz (LVPECL/LVDS/HCSL) or 250MHz (LVCMOS). The device supports I²C programming and boot configuration from an external EEPROM. Key electrical parameters include a maximum input frequency of 875 MHz, a jitter specification of 350 fs RMS (12kHz–20MHz), and operation within a -40°C to +85°C temperature range.

Feature Summary

• Generates up to four independent output frequencies ranging from 8kHz to 1 GHz using one integer and three fractional dividers.
• Supports multiple output voltage standards including LVPECL, LVDS, HCSL, and LVCMOS.
• Features 0.35 ps RMS jitter performance (including spurs) in the 12 kHz to 20 MHz bandwidth.
• Configurable via I²C interface with support for booting configurations directly from an external EEPROM.

Applications

• 10G/40G/100G SONET/SDH and Ethernet network line cards
• Wireless base station baseband units
• GbE/10GbE/100GbE Synchronous Ethernet applications
• Carrier Ethernet switches and OTN equipment

Procurement Notes

Verify component authenticity through authorized channels as this part number may be subject to obsolescence notices. Confirm package integrity and moisture sensitivity level handling procedures prior to assembly. Cross-reference specific ordering suffixes to ensure compatibility with required boot modes and pinout configurations.

Selection Notes

Select this model when requiring four independent clock outputs derived from a single PLL source. Ensure the design accommodates the 40-VFQFN exposed pad package requirements. Verify that the application requires the specific 0.35 ps jitter profile and that the 875 MHz maximum input frequency meets system synchronization needs.

Part Context

This component belongs to the FemtoClock NG Universal Frequency Translator family. It serves as a versatile clock generator capable of translating various input frequencies into high-performance output clocks suitable for demanding telecommunications and data communication infrastructure environments.

Replacement Considerations

Publicly documented substitutes include the 8T49N241-994NLGI, 8T49N241-998NLGI, and 8T49N242-998NLGI8. Verify functional equivalence regarding output count and voltage levels before substitution.