SY89809ALTZ-TR

Clock Buffers, Drivers Overview

The SY89809ALTZ-TR is a high-performance bus clock driver manufactured by Micrel, now part of Microchip Technology. It features nine differential High-Speed Transceiver Logic (HSTL) output pairs designed for low-voltage applications requiring precise signal alignment. The device operates with a 3.3V core supply and an 1.8V output supply to minimize power consumption. It supports both HSTL and LVPECL inputs, selected via the CLK_SEL pin. Key electrical parameters include a maximum clock frequency of 750MHz, typical pin-to-pin skew of 15ps, and typical part-to-part skew of 100ps. The Output Enable (OE) function is synchronous to prevent runt clock pulses.

Clock Buffers, Drivers Feature Summary

• Nine differential HSTL output pairs driving 50Ω-to-ground loads without offset voltage
• Multiplexed input selection between HSTL and LVPECL via the CLK_SEL pin
• Synchronous Output Enable (OE) prevents glitching and runt clock pulses during enable/disable transitions
• Low skew performance with 15ps typical pin-to-pin skew and 100ps typical part-to-part skew

Clock Buffers, Drivers Applications

• High-performance PCs
• Workstations
• Parallel processor-based systems
• Other high-performance computing environments
• Communications equipment

Clock Buffers, Drivers Procurement Notes

Verify component authenticity as the datasheet originates from Micrel, Inc., which was acquired by Microchip Technology. Confirm that the ordering suffix 'TR' indicates Tape and Reel packaging. Ensure the specific lot corresponds to the commercial operating temperature range of 0°C to +85°C. Check for Pb-Free matte-Sn lead finish compliance if required for assembly processes.

Clock Buffers, Drivers Selection Notes

Select this component when a large number of precisely aligned differential outputs are required for low-voltage logic interfaces. It is suitable for designs needing a single solution to drive multiple destinations with ultra-low skew. Ensure the design can accommodate separate 3.3V and 1.8V power rails. Verify that the 32-pin TQFP package fits the available PCB space constraints.

Clock Buffers, Drivers Part Context

This component belongs to the SY89809AL series of high-performance bus clock drivers. It is distributed under the Microchip Technology brand following the acquisition of Micrel. The part is identified by the manufacturer number SY89809ALTZ-TR and is housed in a 32-pin TQFP package. It serves as a distribution element for clock signals in complex digital systems.

Clock Buffers, Drivers Replacement Considerations

Public confirmed substitute part numbers are not provided in the source material. Designers should consult official Microchip or Micrel documentation for cross-reference information or contact the manufacturer directly for compatible alternatives.