CY2309ENZSXC-1H

Clock Generators, PLLs, Frequency Synthesizers Overview

The CY2309ENZSXC-1H is a PLL-based zero-delay clock buffer manufactured by Cypress Semiconductor. It operates within the 2309 series and accepts a single reference input to drive nine low-skew outputs, organized as two banks of four plus one dedicated output. The device features an on-chip phase-locked loop that locks to the input clock via the REF pin, with feedback obtained from the CLKOUT pad. It supports frequencies up to 133 MHz and functions at 3.3V. The component is housed in a 16-pin TSSOP package (MO-153) with lead-free construction, suitable for industrial temperature ranges.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Zero-delay buffer architecture with on-chip PLL locking to REF pin
• Nine low-skew outputs: grouped as 4 + 4 + 1 configuration
• Operating frequency range up to 133 MHz
• 3.3V supply voltage operation

Clock Generators, PLLs, Frequency Synthesizers Applications

• Distribution of high-speed clocks in Pentium-based systems
• CPU bus frequency synchronization
• PCI bus clock distribution

Clock Generators, PLLs, Frequency Synthesizers Part Context

The CY2309ENZSXC-1H belongs to the CY2309 family of low-cost 3.3V zero-delay buffers. It is functionally related to the CY2305, which offers an 8-pin version with five outputs. The -1H suffix indicates operation at higher frequencies (up to 133 MHz) with increased drive capability compared to standard -1 devices. Infineon Technologies acquired Cypress Semiconductor, and later versions may carry the Infineon branding.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Designers should verify compatibility with the CY2309SC-1H or CY2309EZXI-1H based on package and electrical requirements.