CY23S05SXC-1HT

Clock Generators, PLLs, Frequency Synthesizers Overview

The CY23S05SXC-1HT is a commercial-grade, low-cost 3.3 V zero delay buffer manufactured by Infineon Technologies (formerly Cypress). It utilizes advanced 0.65 µm CMOS technology and features an on-chip PLL that locks to an input clock on the REF pin. The device accepts one reference input and drives five low-skew LVCMOS outputs. It supports operating frequencies from 10 MHz to 133 MHz and includes Spread Aware functionality to pass through spread spectrum signals without filtering. The -1H suffix indicates high drive capability with faster rise and fall times compared to standard versions.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Zero input-output propagation delay achieved through internal PLL feedback loop adjustment
• Spread Aware design allows direct transmission of spread spectrum frequency timing generation signals
• High drive output capability providing faster signal transition times for improved system performance
• Automatic power-down mode reduces current consumption when no rising edges are detected on the reference input

Clock Generators, PLLs, Frequency Synthesizers Applications

• Distribution of CPU bus clocks in computer systems
• PCI bus clock distribution networks
• High-speed digital system synchronization requiring low skew
• Clock buffering for processors and memory controllers

Clock Generators, PLLs, Frequency Synthesizers Procurement Notes

Verify the specific ordering code against the manufacturer's official documentation to confirm package type and temperature range. The 'HT' suffix denotes tape and reel packaging. Confirm RoHS compliance status and lead-free finish requirements with the supplier prior to procurement to ensure alignment with assembly specifications.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this component when a single-ended clock source requires expansion into five buffered outputs with minimal skew. Ensure the load capacitance matches the datasheet recommendations for the target frequency to maintain zero delay characteristics. Compare the high-drive (-1H) version against standard drive options if signal integrity at higher frequencies is critical.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This part belongs to the CY23S05 family of zero delay buffers. It shares functional similarities with the CY23S09 but provides five outputs instead of nine. The CY23S05SXC-1HT is the commercial temperature variant packaged in tape and reel format. It serves as a clock distribution solution for systems requiring precise timing alignment between input and output signals.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

Direct replacements include other CY23S05 variants such as CY23S05SXC-1H for tube packaging or CY23S05SXI-1H for industrial temperature ranges. Cross-family alternatives like the CY2305 series offer similar zero-delay buffering but may differ in drive strength and package dimensions. Verify pin compatibility and electrical parameters before substitution.

Clock Generators, PLLs, Frequency Synthesizers FAQ

How is zero input-output delay achieved?

Zero delay is achieved by adjusting the capacitive load on the CLKOUT pin relative to the other outputs. The CLKOUT pin provides internal feedback to the PLL, allowing the input-to-output delay to be tuned to near zero.

What is the maximum output-to-output skew?

The output-to-output skew is guaranteed to be less than 250 ps when all outputs are equally loaded.

Does the device support spread spectrum modulation?

Yes, the CY23S05 is Spread Aware and does not filter out spread spectrum signals applied to the REF input, preserving the EMI reduction benefits of the source clock.