ICS9LPRS525AFLF

Overview

The ICS9LPRS525AFLF is a clock synthesizer compliant with the Intel CK505 Yellow Cover specification, designed for Intel desktop chipsets. It integrates a voltage regulator and series resistors on differential outputs. The device accepts a 14.318MHz crystal input and provides a 1:19 frequency ratio. Key specifications include a maximum frequency of 400MHz, a supply voltage range of 3.135V to 3.465V, and an operating temperature range of 0°C to 70°C. It features low power differential push-pull pairs for CPU and SRC outputs, along with single-ended outputs for PCI, USB, and REF.

Feature Summary

• Compliant with Intel CK505 Yellow Cover specification
• Fully integrated voltage regulator and series resistors on differential outputs
• Supports spread spectrum modulation from 0 to -0.5% down spread
• Provides CPU outputs with cycle-cycle jitter less than 85ps

Applications

• Intel desktop chipset clock generation
• PCI Express (PCIe) support
• Serial ATA (SATA) timing

Procurement Notes

Verify the specific ordering suffix 'AFLF' against official Renesas documentation to confirm package type and lead-free status. The datasheet lists variants such as AGILFT and AGLF; ensure the selected part matches the required 56-SSOP or TSSOP form factor and RoHS compliance requirements for the target application.

Selection Notes

Select this component when a direct replacement for the CK505 is required for Intel desktop architectures. Ensure the design accommodates the 3.135V to 3.465V supply range and utilizes external load capacitors for the 14.318MHz crystal input to achieve the specified +/- 100ppm frequency accuracy across all outputs.

Part Context

This part belongs to the IDT PC Main Clock family, specifically engineered as a 56-pin derivative for Intel systems. It consolidates multiple clock functions into a single chip, reducing board space by integrating regulators and output resistors previously handled by discrete components in earlier CK505 implementations.

Replacement Considerations

Direct pin-to-pin replacements may include other CK505 derivatives like the 9EPRS525AGILFT. Verify that substitute parts maintain compatibility with the specific SMBus configuration registers and hardware strap requirements defined in the ICS9LPRS525 datasheet.