85310AYI-21LNT

Overview

The Renesas 85310AYI-21LNT is a low skew, high-performance dual 1-to-5 differential-to-2.5V/3.3V ECL/LVPECL fanout buffer. It features two differential clock input pairs (CLKx, nCLKx) capable of accepting LVDS, LVPECL, LVHSTL, SSTL, and HCSL levels. The device translates single-ended inputs to 3.3V LVPECL via resistor bias on the nCLKx input. Key electrical parameters include a maximum output frequency of 700MHz, typical output skew of 25ps, part-to-part skew of 270ps, propagation delay of 1.7ns, and additive phase jitter RMS of less than 0.13ps. It operates from a 2.5V or 3.3V supply.

Feature Summary

• Dual 1-to-5 differential outputs supporting 2.5V/3.3V LVPECL/ECL banks
• Wide differential input compatibility including LVDS, LVPECL, LVHSTL, SSTL, and HCSL
• Low skew performance with 25ps typical output skew and <0.13ps RMS additive jitter
• Single-ended to LVPECL translation capability via nCLKx input biasing

Applications

• High-speed clock distribution networks requiring precise timing
• Systems demanding well-defined repeatability in clock signals
• Interfaces between different voltage level domains (e.g., LVDS to LVPECL)

Procurement Notes

Verify the specific suffix 'AYI-21LNT' against official Renesas documentation to confirm package type, temperature range, and RoHS compliance status. Ensure the ordering code matches the exact pinout and electrical specifications required for the design, as minor suffix variations can indicate different packaging or environmental ratings.

Selection Notes

Select this component when dual independent clock buffers are needed with strict skew constraints. Verify that the system power supply aligns with the 2.375V to 3.8V VCC range for LVPECL mode. Confirm that the input signal levels fall within the supported differential standards and that the 700MHz maximum frequency meets the application's clock rate requirements.

Part Context

This part belongs to the 85310 series of fanout buffers, designed for high-frequency clock distribution. It serves as an alternative to similar devices like the 85310I-11, offering higher output density (1-to-5 vs 1-to-10 total across two channels) with comparable jitter performance. It is distinct from the obsolete 851021 series which focuses on HCSL outputs.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material. Evaluate other members of the 85310 family or equivalent low-skew fanout buffers from other manufacturers only after verifying pin compatibility and electrical parameter equivalence.