CY2308SXI-1

Clock Generators, PLLs, Frequency Synthesizers Overview

The CY2308SXI-1 is a 3.3 V Zero Delay Buffer manufactured by Infineon Technologies, designed for distributing high-speed clocks in PC, workstation, datacom, and telecom applications. It features an on-chip PLL that locks to an input clock presented on the REF pin, with feedback driven from an external FBK pin connected to one of eight outputs. The device operates within a frequency range of 10 MHz to 133 MHz and supports two banks of four three-stateable outputs. Key electrical parameters include a supply voltage (VDD) range of 3.0 V to 3.6 V, typical cycle-to-cycle jitter of 75 ps at 66 MHz with a 15 pF load, and input-to-output skew less than 250 ps. It is available in a 16-pin SOIC package and supports industrial temperature operation from -40 °C to +85 °C.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Zero input-output propagation delay adjustable via capacitive load on the FBK input
• Two banks of four low-skew outputs, each bank three-stateable by select inputs
• On-chip PLL with flexible feedback configuration allowing any output to drive the FBK pin
• Space-saving 16-pin SOIC package suitable for high-density designs

Clock Generators, PLLs, Frequency Synthesizers Applications

• PC and workstation clock distribution
• Datacom equipment timing
• Telecom system synchronization

Clock Generators, PLLs, Frequency Synthesizers Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm RoHS compliance status and check for end-of-life notifications, as this part may be subject to obsolescence. Ensure proper handling for moisture sensitivity levels during storage and assembly processes.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select the CY2308SXI-1 when zero-delay buffering is required for 3.3 V systems operating up to 133 MHz. Consider the -1H variant if faster rise and fall times are necessary. Verify that the application requires industrial temperature range (-40 °C to +85 °C) and ensure adequate load capacitance management for skew control.

Clock Generators, PLLs, Frequency Synthesizers Part Context

The CY2308 series includes variants such as CY2308-1, -1H, -2, -3, -4, and -5H, offering different frequency multiplication options and drive strengths. The -1 variant provides reference frequency outputs, while the -1H offers higher drive capability. Other variants enable 2x or 4x frequency multiplication depending on the feedback path configuration.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

Direct substitutes include other CY2308 family members like CY2308SXI-1H for enhanced drive strength. Cross-family replacements require verification of voltage levels, package compatibility, and jitter specifications.

Clock Generators, PLLs, Frequency Synthesizers FAQ

How is zero input-output delay achieved?

Zero delay is achieved by connecting one of the outputs to the FBK pin and ensuring all outputs, including the feedback output, have equal capacitive loading.

What happens if the REF input has no rising edges?

The PLL enters a power-down state, three-stating all outputs and turning off the PLL, resulting in current draw of less than 25 µA.

Can multiple CY2308 devices share the same input clock?

Yes, multiple devices can accept the same input clock, with device-to-device skew specified as less than 700 ps.