CY2308SXC-4

Clock Generators, PLLs, Frequency Synthesizers Overview

The CY2308SXC-4 is a 3.3 V Zero Delay Buffer from the CY2308 series, manufactured by Cypress Semiconductor Corporation. It features an on-chip PLL that locks to an input clock presented on the REF pin, with external feedback driven from the FBK pin. The device provides eight true outputs divided into two banks of four, which are three-stateable via select inputs S1 and S2. It operates within a frequency range of 10 MHz to 133 MHz. Typical cycle-to-cycle jitter is 75 ps at 66 MHz with a 15 pF load. Input-to-output skew is less than 250 ps, and output-to-output skew is less than 200 ps. The part is housed in a space-saving 16-pin SOIC package.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Zero input-output propagation delay adjustable by capacitive load on the FBK input
• Generates 2x clock frequencies on all outputs when configured with feedback from Bank A or Bank B
• Two banks of four outputs, three-stateable by two select inputs (S1, S2)
• 10 MHz to 133 MHz operating range with typical 75 ps cycle-to-cycle jitter

Clock Generators, PLLs, Frequency Synthesizers Applications

• PC clock distribution
• Workstation clock distribution
• Datacom applications
• Telecom applications
• High performance system clocking

Clock Generators, PLLs, Frequency Synthesizers Procurement Notes

Verify the ordering suffix 'X' indicates a tube package for the CY2308SXC-4 variant. Confirm the temperature range corresponds to the 'C' suffix for commercial operation (0 °C to +70 °C). Ensure the lead-free status matches the product specifications. Check for any specific errata regarding start-up lock time if the reference clock is absent during power-up.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select the CY2308SXC-4 when a fixed 2x multiplication of the reference clock is required across all outputs. Choose this over -1 or -2 variants if variable frequency division is not needed. Verify that the 16-pin SOIC package fits the PCB layout constraints. Ensure the load capacitance requirements (15 pF for >100 MHz) are met to maintain specified jitter performance.

Clock Generators, PLLs, Frequency Synthesizers Part Context

The CY2308SXC-4 belongs to the CY2308 family of 3.3 V Zero Delay Buffers. It is distinct from the -1, -2, -3, and -5H configurations by its fixed 2x output frequency capability. The 'S' denotes the 16-pin SOIC package, while 'C' specifies the commercial temperature range. This part is designed for high-speed clock distribution where low skew and zero delay are critical.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

Direct functional replacements include other CY2308 variants such as CY2308SXI-4 for industrial temperature ranges. Cross-family substitutes like the CY23S08 series offer similar zero-delay buffering but may differ in drive strength and configuration options. Verify pin compatibility and electrical characteristics before substitution.