8T49N241-994NLGI

Overview

The 8T49N241-994NLGI is a FemtoClock NG Universal Frequency Translator manufactured by Renesas Electronics. It features one fractional-feedback PLL with one integer and three fractional output dividers, generating up to four independent output frequencies ranging from 8kHz to 1GHz. The device supports LVPECL, LVDS, HCSL, or LVCMOS output levels and accepts multiple input clock types including LVPECL, LVDS, LVHSTL, HCSL, LVCMOS, and crystals. It operates on a single 2.5V or 3.3V supply and includes register programmability via I²C or external EEPROM.

Feature Summary

• Generates up to four different and unrelated output frequencies from two clock inputs and a crystal input
• Supports output frequencies ranging from 8kHz up to 1.0GHz (differential) and 8kHz to 250MHz (LVCMOS)
• Features 0.35ps RMS jitter (including spurs) from 12kHz to 20MHz
• Provides auto and manual input clock selection with hitless switching

Applications

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

Procurement Notes

Verify the specific suffix '994NLGI' against official Renesas documentation to confirm factory-programmed configuration details. Confirm current availability status as distribution channels may vary. Ensure compliance with RoHS3 specifications and check for any relevant Product Change Notices affecting assembly sites or marking.

Selection Notes

Select this component when requiring a single PLL solution capable of translating multiple input references into four distinct output frequencies. Verify that the required output voltage levels (LVPECL, LVDS, HCSL, or LVCMOS) match the target application interfaces. Consider the 0.35ps RMS jitter specification for high-speed serial link requirements up to 25G Ethernet.

Part Context

This part belongs to the FemtoClock NG family of timing products. The 8T49N241 series is designed as a universal frequency translator suitable for networking and communication applications. It integrates jitter attenuation and frequency synthesis capabilities within a compact package, supporting both integer and fractional-N output division modes.

Replacement Considerations

The 849N202CKILF is listed as a similar replacement option. Verify pinout compatibility and electrical parameter alignment before substitution.