CSPT855PG

Application Specific Clock/Timing Overview

The CSPT855PG is a zero-delay buffer and clock driver designed for memory and DDR applications. Manufactured by Renesas Electronics Corporation, this integrated circuit operates within a supply voltage range of 2.3V to 2.7V and supports a maximum frequency of 220MHz. It features a single circuit with a 1:4 input-to-output ratio, providing differential inputs and outputs. The device is housed in a 28-TSSOP package (0.173 inch width) and is rated for an operating temperature range of 0°C to 70°C.

Application Specific Clock/Timing Feature Summary

• Zero-delay buffering capability for precise timing alignment
• Supports differential input and output signals
• 1:4 fan-out ratio for distributing clock signals
• Optimized for Memory and DDR system applications

Application Specific Clock/Timing Applications

• DDR memory subsystems
• General memory controller interfaces
• High-speed digital board-level clock distribution

Application Specific Clock/Timing Procurement Notes

Verify the specific ordering suffix against the manufacturer's current documentation, as suffixes often determine packaging or temperature grade variations. Confirm RoHS compliance status directly with the supplier, as historical data may vary. Ensure the 28-TSSOP footprint matches the target PCB design constraints before procurement.

Application Specific Clock/Timing Selection Notes

Select this component when a low-skew, zero-delay buffer is required for DDR memory interfaces. Ensure the system power supply remains strictly within the 2.3V to 2.7V range to maintain signal integrity. Verify that the 220MHz maximum frequency meets the system clock requirements and that the 1:4 output drive capability is sufficient for the load.

Application Specific Clock/Timing Part Context

This part belongs to the CSPT855 series of clock buffers from Renesas Electronics. It serves as a specialized timing solution for high-speed memory systems, distinct from general-purpose oscillators or dividers. The device integrates PLL technology to minimize jitter and skew between the input reference and the distributed outputs.

Application Specific Clock/Timing Replacement Considerations

Check for direct pin-compatible alternatives within the same Renesas CSPT85x family, such as variants with different fan-out ratios or packages. Cross-reference with other zero-delay buffer ICs offering similar 2.3V-2.7V operation and 220MHz performance if sourcing is limited.