85210AY-31LF

Overview

The ICS85210-31 is a low skew, dual 1-to-5 differential-to-HSTL fanout buffer manufactured by Integrated Device Technology (IDT). It operates from a 3.3V core supply and a 1.4V to 2.0V output supply (VDDO), supporting maximum output frequencies up to 650MHz. The device features two selectable differential clock input pairs that accept LVPECL, LVDS, HSTL, SSTL, or HCSL signals. Key electrical specifications include a maximum output skew of 50ps and part-to-part skew of 350ps. It translates single-ended inputs to LVHSTL levels using resistor biasing on the nCLKx inputs.

Feature Summary

• Dual 1-to-5 HSTL compatible bank outputs with 2 selectable differential clock input pairs
• Accepts multiple differential input levels including LVPECL, LVDS, HSTL, SSTL, and HCSL
• Maximum output frequency of 650MHz with maximum propagation delay of 2ns
• Guaranteed output skew of 50ps maximum and part-to-part skew of 350ps maximum

Applications

• Clock distribution applications demanding well-defined performance and repeatability
• Systems requiring translation of differential signals to HSTL levels
• High-speed digital interfaces utilizing LVPECL, LVDS, or HCSL sources

Procurement Notes

Verify the manufacturer origin, as the datasheet identifies Integrated Device Technology (IDT) as the producer. Confirm RoHS compliance status, noting availability in both standard (RoHS 5) and lead-free (RoHS 6) packages. Ensure the specific ordering suffix matches the required temperature range and packaging type for the design.

Selection Notes

Select this component when dual independent clock domains require buffering to HSTL standards. Verify that the system VDDO voltage falls within the 1.4V to 2.0V range to meet HSTL DC characteristics. Consider the 32-lead LQFP package dimensions (7mm x 7mm) for PCB layout constraints and ensure thermal management accounts for the junction-to-ambient resistance values provided in the datasheet.

Part Context

This component belongs to the ICS8521 series of fanout buffers. It is designed to interface between various differential clock sources and HSTL-compatible receivers. The device integrates internal pull-up and pull-down resistors for control inputs and supports enable/disable functionality via CLK_EN pins.

Replacement Considerations

Public confirmed substitute part numbers are not available in the source material.

FAQ

Can the ICS85210-31 accept single-ended input signals?

Yes, it can translate any single-ended input signal to LVHSTL levels by using resistor biasing on the nCLKx inputs.

What is the maximum operating frequency of the device?

The maximum output frequency is characterized at 650MHz.

What power supplies are required for operation?

The device requires a 3.3V core supply (VDD) and an output supply (VDDO) ranging from 1.4V to 2.0V.