8T49N222B-000NLGI8

Overview

The 8T49N222B-000NLGI8 is a FemtoClock NG Universal Frequency Translator manufactured by Renesas Electronics Corporation. It features one fractional-feedback PLL capable of functioning as a frequency translator with jitter attenuation or a frequency synthesizer. The device supports up to four independent output dividers, generating frequencies from 8kHz to 1GHz (differential) or 8kHz to 250MHz (LVCMOS). It accepts multiple input levels including LVPECL, LVDS, LVHSTL, HCSL, and crystals. Key specifications include an RMS phase jitter of 0.276ps (including spurs) from 12kHz to 20MHz, hitless switching capabilities, and I²C programmability via external EEPROM.

Feature Summary

• Generates up to 4 LVPECL/LVDS/HCSL or 16 LVCMOS outputs ranging from 8kHz to 1GHz
• Low RMS phase jitter of 0.276ps (including spurs) at 12kHz to 20MHz
• Supports auto and manual input clock selection with hitless switching
• Register programmable through I²C or via external I²C EEPROM

Applications

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

Part Context

This component belongs to the FemtoClock NG family of universal frequency translators. It is designed to meet Telcordia GR-253-CORE and ITU-T G.813/G.8262 requirements when paired with a Synchronous Equipment Timing Source (SETS). The device integrates alarm and monitoring functions suitable for high-performance networking and communication systems.

Replacement Considerations

The 8T49N242 series serves as a similar alternative within the same product family. Specific substitutes include the 8T49N242-998NLGI8 and 8T49N242-999NLGI. Users should verify pin compatibility and specific configuration requirements before substitution.