851021AYLFT

Overview

The 851021AYLFT is a 1-to-21 differential HCSL fanout buffer manufactured by Renesas Electronics. It translates various differential input signals, including LVPECL, LVHSTL, LVDS, and HCSL, into differential HCSL output levels without requiring external bias networks. The device operates at a maximum frequency of 250MHz with a supply voltage of 3.3V. Key performance metrics include a maximum output skew of 395ps, part-to-part skew of 335ps, and output drift of 140ps. It is housed in a 64-pin TQFP package and supports an ambient operating temperature range of 0°C to 70°C.

Feature Summary

• Provides twenty-one differential HCSL outputs for signal distribution
• Translates multiple differential input standards (LVPECL, LVHSTL, LVDS, HCSL) to HCSL levels
• Maximum output frequency of 250MHz with low skew characteristics
• Operates on a full 3.3V supply voltage

Applications

• PCI Express interface applications
• Fully Buffered DIMM (FBDIMM) systems
• High-speed clock distribution networks

Part Context

The 851021AYLFT belongs to the ICS851021 series of clock buffers. This specific suffix indicates a reel packaging format. The component is classified as obsolete status in public distributor records. It is part of Renesas' portfolio of high-performance clocking solutions designed for demanding digital interfaces.

Replacement Considerations

Public records indicate the 851021AYLF variant as a tray-packaged alternative within the same functional family. Designers should verify pin compatibility and electrical specifications against current available inventory when selecting substitutes.