8T49N244A-004ASGI

Overview

The Renesas 8T49N244A-004ASGI is a FemtoClock NG Universal Frequency Translator IC designed for high-performance clocking applications. It features two independent PLLs within an 80-LBGA package, supporting input frequencies up to 710 MHz and generating output frequencies up to 1.3 GHz. The device accepts various input formats including LVDS, LVPECL, HCSL, LVCMOS, LVTTL, and LVHSTL, while providing differential LVDS or LVPECL outputs. It operates on dual power supplies of 2.5V (2.375V–2.625V) and 3.3V (3.135V–3.465V), with a specified operating temperature range of -40°C to +85°C.

Feature Summary

• Dual-PLL architecture enabling four independent output channels from a single reference source.
• Supports multiple input signaling standards: LVDS, LVPECL, HCSL, LVCMOS, LVTTL, and LVHSTL.
• Generates output frequencies up to 1.3 GHz with low phase jitter characteristics typical of the FemtoClock NG family.
• Integrated I²C serial interface for register programming and configuration.

Applications

• Networking and communication equipment requiring precise frequency translation.
• SONET/SDH and Synchronous Ethernet line cards.
• Wireless base station baseband units.
• Carrier Ethernet switches and OTN systems.

Procurement Notes

This component is identified as End-of-Life (EOL) by the manufacturer. A Product Change Notification indicates discontinuation effective May 30, 2025. Verification of current availability should be conducted through authorized distributors, noting that standard factory packaging quantities may apply where stock exists.

Selection Notes

Select this model when a dual-PLL solution is required to generate up to four distinct output frequencies from one input. Ensure the design supports the specific 80-LBGA (10x10mm) footprint and accommodates the dual voltage requirements (2.5V and 3.3V). Verify that the required output swing matches LVDS or LVPECL standards provided by this device.

Part Context

The 8T49N244A belongs to the FemtoClock NG Universal Frequency Translator family, which also includes the Tri-PLL 8T49N366I and Quad-PLL 8T49N445I variants. These devices share common technology features such as smooth reference switching and fractional-N PLL capabilities, tailored for networking and telecom timing applications.

Replacement Considerations

Due to the EOL status, direct substitutes are not explicitly listed in the provided documentation. Engineers should evaluate other members of the FemtoClock NG family, such as the 8T49N242 or 8T49N445, ensuring compatibility with pinout and electrical specifications.