CY22381SXC-182

Clock Generators, PLLs, Frequency Synthesizers Overview

The CY22381SXC-182 is a three-phase-locked-loop (PLL) general-purpose FLASH programmable clock generator manufactured by Cypress Semiconductor. Designed for networking, telecommunications, and datacom applications, the device operates on a single 3.3 V power supply. It features an on-chip reference oscillator capable of accepting an 8–30 MHz crystal or a 1–166 MHz external clock signal. The architecture includes three PLLs driving three programmable output clocks derived from either the PLLs or the reference frequency, utilizing output post dividers for frequency synthesis.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Three integrated phase-locked loops with ultra-wide divide counters (eight-bit Q, eleven-bit P, seven-bit post divide)
• FLASH programmability allowing field reprogramming without external memory
• Low-jitter, high-accuracy outputs with configurable crystal drive strength
• Power-management options including Shutdown, Output Enable (OE), and Suspend modes

Clock Generators, PLLs, Frequency Synthesizers Applications

• Networking equipment clock distribution
• Telecommunication system synchronization
• Datacom interface timing generation

Clock Generators, PLLs, Frequency Synthesizers Procurement Notes

Verify component authenticity through authorized Cypress distributors or certified secondary market suppliers. Confirm RoHS compliance status as older variants may not meet current environmental standards. Validate package integrity for the 8-pin SOIC form factor. Ensure programming tools such as CyClocks RT software are compatible with the specific revision. Check for obsolescence notices from Infineon Technologies following the Cypress acquisition.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this component when three independent programmable clock outputs are required from a single 3.3 V source. Verify that the input frequency range of 1–166 MHz aligns with the system reference. Consider the 8-pin SOIC package constraints for PCB layout. Evaluate jitter specifications against downstream receiver requirements. Confirm FLASH endurance ratings if frequent field reprogramming is anticipated.

Clock Generators, PLLs, Frequency Synthesizers Part Context

The CY22381 series represents a family of universal programmable clock generators. Variants such as CY22381FC and CY22381KSXC differ in lead finish, packaging details, or specific factory programming configurations. The CY22381SXC-182 specifically denotes a standard SOIC package variant within this three-PLL family, distinct from the NiPdAu finished CY223811.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

Direct pin-compatible replacements within the same Cypress/Infineon portfolio include other CY22381 variants with adjusted suffixes for package or temperature grade. Cross-family alternatives require verification of PLL count, output voltage levels, and package dimensions.