8T49N205A-999NLGI8

Overview

The 8T49N205A-999NLGI8 is a FemtoClock NG Universal Frequency Translator manufactured by Renesas Electronics Corporation. It features a single fractional-feedback PLL capable of generating up to four independent output frequencies ranging from 8kHz to 1.0GHz with differential outputs, or up to 16 LVCMOS outputs. The device supports input clock levels including LVPECL, LVDS, LVHSTL, HCSL, and LVCMOS, with frequencies up to 875MHz. It operates on a single 2.5V supply within an ambient temperature range of -40°C to 85°C and is housed in a 32-VFQFN package.

Feature Summary

• Generates up to four independent output frequencies using a single fractional-feedback PLL
• Supports multiple input clock levels including LVPECL, LVDS, and HCSL
• Provides hitless switching between input clocks with phase-slope limiting options
• Configurable via I²C interface or external EEPROM for boot-up initialization

Applications

• SONET/SDH and Synchronous Ethernet network line cards
• Wireless base station baseband units
• Carrier Ethernet switches and OTN equipment
• Test and measurement applications requiring precise timing

Procurement Notes

Verify the specific order code suffix against official Renesas documentation to confirm factory pre-programmed frequency configurations. Confirm package type and RoHS compliance status through current datasheets. Check for Product Change Notices regarding assembly sites or material changes before procurement.

Selection Notes

Select this component when a single PLL solution is required to generate multiple independent frequencies from various input references. Ensure compatibility with target jitter limits for 10G to 25G Ethernet applications. Verify that the available output voltage levels match the system requirements without additional translation circuitry.

Part Context

This part belongs to the FemtoClock NG family of universal frequency translators designed for networking and communication systems. It integrates low-phase noise frequency translation and jitter attenuation capabilities. The device is suitable for applications demanding high-frequency precision and flexible clock distribution architectures.

Replacement Considerations

Consult official substitution guides for compatible devices such as the 8T49N242 series. Verify functional equivalence regarding PLL architecture, output count, and supported input/output voltage levels before replacement.