CSPT855PGI

Application Specific Clock/Timing Overview

The CSPT855PGI is a clock buffer and driver integrated circuit manufactured by Renesas Electronics Corporation, designed for memory and DDR applications. It features a single circuit with a 1:4 input-to-output ratio and supports differential input and output signals. The device operates within a supply voltage range of 2.3V to 2.7V and supports a maximum frequency of 220MHz. It includes an integrated Phase-Locked Loop (PLL) and is housed in a 28-TSSOP package with a width of 4.40mm. The component is rated for an operating temperature range of -40°C to 85°C.

Application Specific Clock/Timing Feature Summary

• Integrated PLL for zero-delay buffering
• 1:4 Input/Output Ratio with Differential I/O
• 220MHz Maximum Frequency
• 2.3V to 2.7V Supply Voltage Range

Application Specific Clock/Timing Applications

• Memory Systems
• DDR Clock Distribution

Application Specific Clock/Timing Procurement Notes

Verify the specific ordering suffix 'I' against official Renesas documentation to confirm the extended temperature rating (-40°C to 85°C), as standard variants may differ. Confirm current product status, as similar models in the CSPT855 series are marked as obsolete. Ensure compatibility with 28-TSSOP footprint requirements during procurement planning.

Application Specific Clock/Timing Selection Notes

Select this component when a 1:4 clock distribution solution with integrated PLL buffering is required for DDR memory interfaces. The 28-TSSOP package suits surface-mount designs requiring a 4.40mm width. Verify that the system power supply strictly adheres to the 2.3V–2.7V range to ensure proper operation at frequencies up to 220MHz.

Application Specific Clock/Timing Part Context

The CSPT855PGI belongs to the CSPT855 family of clock buffers and drivers. This series is engineered specifically for high-performance memory subsystems, providing signal integrity through zero-delay buffering. The part utilizes a 28-TSSOP package, distinguishing it from other form factors like TQFP or BGA available in related model variations.

Application Specific Clock/Timing Replacement Considerations

Check for direct pin-compatible substitutes within the CSPT855 series. Note that some distributors list the CSPT855PGG variant; verify if the 'G' suffix denotes identical electrical characteristics and temperature range before substitution.