CY2303SXC

Clock Generators, PLLs, Frequency Synthesizers Overview

The CY2303SXC is a phase-aligned clock multiplier manufactured by Cypress Semiconductor. It provides three outputs with 1x, 2x, and 4x multiplication of the reference input frequency. The device operates within a 10 MHz to 166.67 MHz range using a 3.3 V supply voltage. It features an on-chip PLL for phase alignment, ensuring input-to-output skew is less than ±200 ps and output-to-output skew is under 200 ps. Typical period jitter is specified at 80 ps. The component is housed in an 8-pin SOIC package and supports commercial temperature ranges.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Three-output configuration providing 1x, 2x, and 4x reference frequencies
• On-chip PLL with guaranteed phase alignment and low skew
• Supports operating frequencies up to 166.67 MHz
• 5 V tolerant REFIN input pin

Clock Generators, PLLs, Frequency Synthesizers Applications

• PC system clock distribution
• Workstation high-speed clocking
• Datacom equipment timing
• Telecom infrastructure synchronization

Clock Generators, PLLs, Frequency Synthesizers Procurement Notes

Verify the specific ordering suffix when sourcing components. The 'C' suffix indicates the standard tube packaging format, while 'T' denotes tape and reel. Confirm that the silicon revision matches current errata requirements regarding startup lock time behavior to ensure proper initialization during power-up sequences.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this component when a fixed 1x, 2x, or 4x clock multiplication ratio is required without programmable registers. Ensure the load capacitance requirements are met: 18 pF for frequencies up to 133.33 MHz and 12 pF for frequencies between 133.33 MHz and 166.67 MHz. Verify that the single-reference input architecture aligns with the system design constraints.

Clock Generators, PLLs, Frequency Synthesizers Part Context

The CY2303 belongs to the Cypress 23S series of phase-aligned clock multipliers. It serves as a dedicated solution for distributing synchronized clocks across multiple subsystems. The device simplifies board layout by eliminating external feedback components through its internal PLL connection to the REF output pin.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

The CY2303SXCT is functionally identical but supplied in tape and reel packaging instead of tubes. Other members of the 23S family may offer different output counts or voltage levels but require verification of electrical compatibility before substitution.

Clock Generators, PLLs, Frequency Synthesizers FAQ

How does the device handle startup lock time?

To prevent extended lock times caused by noise coupling, the reference input should be applied before the power supply (VDD) reaches its minimum operating voltage.

What is the maximum allowable load capacitance?

The maximum load capacitance is 18 pF for output frequencies up to 133.33 MHz, and it reduces to 12 pF for frequencies between 133.33 MHz and 166.67 MHz.

Is the REFIN pin compatible with 5 V logic?

Yes, the REFIN pin is explicitly designed to be 5 V tolerant, allowing direct interfacing with 5 V reference sources.