954119DFLF

Application Specific Clock/Timing Overview

The ICS954119 is a clock synthesizer compliant with the Intel CK410 specification, designed for next-generation P4 processors and chipsets. It provides multiple output pairs including two 0.7V current-mode differential CPU clocks, one SRC pair, five PCI-Express pairs, six standard PCI outputs, and dedicated USB and DOT clocks. The device operates from a 14.318MHz external crystal reference and supports programmable frequencies via hardware pins or an SMBus interface. Key electrical specifications include cycle-cycle jitter of less than 85ps for CPU/SRC outputs and less than 250ps for PCI outputs, with frequency accuracy of +/- 300ppm on critical CPU and SRC clocks.

Application Specific Clock/Timing Feature Summary

• Compliant with Intel CK410 Yellow Cover specification for P4 processor support
• Programmable spread spectrum modulation (0 to -0.5% down, ±0.25% center, ±0.3% center)
• Integrated watchdog timer with programmable safe frequency source
• SMBus interface for dynamic configuration of frequency, skew, and output control

Application Specific Clock/Timing Applications

• Next-generation Intel P4 processor platforms
• Intel chipset clock generation
• Serial-ATA (S-ATA) timing applications requiring tight ppm accuracy

Application Specific Clock/Timing Procurement Notes

Verify that the component matches the Integrated Circuit Systems, Inc. (ICS) part number ICS954119, as Renesas Electronics Corporation acquired ICS. Confirm the package type is 56-pin SSOP and check for 'Advance Information' markings if sourcing early production units, as datasheets may indicate design-phase status.

Application Specific Clock/Timing Selection Notes

Select this component when designing systems requiring strict adherence to the Intel CK410 clock specification. Ensure the design accommodates the required 14.318MHz external crystal and load capacitors. Verify that the 3.3V supply voltage range and 0.7V current-mode output requirements align with the target processor's input specifications.

Application Specific Clock/Timing Part Context

This device was originally manufactured by Integrated Circuit Systems, Inc. (ICS). Following Renesas Electronics Corporation's acquisition of ICS, these products are often cataloged under the Renesas brand. The ICS954119 serves as a specialized clock generator for legacy high-performance computing architectures based on the Pentium 4 platform.

Application Specific Clock/Timing Replacement Considerations

Direct pin-to-pin replacements are limited due to the specific CK410 compliance. Potential alternatives must be verified against the Intel CK410 specification table for compatible frequency sets and jitter budgets. Cross-reference with other ICS/Renesas clock generators like the ICS954118 or ICS954120 series if pinout compatibility is required.