8T49N285-001NLGI

Overview

The 8T49N285-001NLGI is a FemtoClock NG Universal Frequency Translator manufactured by Renesas Electronics. It features a single fractional-feedback PLL capable of jitter attenuation or frequency synthesis, generating up to four independent output frequencies ranging from 8kHz to 1GHz (differential) or 250MHz (LVCMOS). The device supports LVPECL, LVDS, HCSL, and LVCMOS output levels, with auto/manual input clock selection and hitless switching capabilities. It operates from a 10MHz to 50MHz fundamental-mode crystal and is register-programmable via I2C.

Feature Summary

• Generates up to four different output frequencies from two clock inputs and a crystal input
• Supports LVPECL, LVDS, HCSL, and LVCMOS output levels
• Features auto and manual input clock selection with hitless switching
• Compliant with Telcordia GR-253-CORE and ITU-T G.813/G.8262 standards

Applications

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

Procurement Notes

Verify the specific suffix '001' against official Renesas documentation to confirm factory preprogrammed configuration settings. Confirm package type and moisture sensitivity level requirements for handling and storage prior to procurement.

Selection Notes

Select this component when designing systems requiring precise jitter attenuation or flexible frequency translation for high-speed serial links. Ensure the required output voltage levels (LVPECL/LVDS/HCSL/LVCMOS) match the target interface specifications and that the operating temperature range meets system environmental constraints.

Part Context

This part belongs to the 8T49N285A series within the FemtoClock family. It serves as a universal frequency translator ideal for preserving timing compliance in synchronous Ethernet applications. Note that Renesas timing products are transitioning to SiTime; verify current support status and long-term availability through official channels.

Replacement Considerations

Consult the official migration guide for potential cross-model substitutes within the 8T49N285A series. Verify pinout compatibility and electrical parameter alignment before considering alternative vendors.