954201BFLF

Application Specific Clock/Timing Overview

The ICS954201BFLF is a Timing Control Hub™ clock synthesizer designed for mobile systems utilizing Intel P4-M processors and chipsets. Operating on a 3.3V supply, it generates CPU outputs up to 400MHz using an external 14.318MHz crystal reference. The device provides tight ppm accuracy required by Serial ATA and PCI-Express interfaces. It features multiple differential output pairs including CPU, SRC, PCI, USB, and DOT clocks, packaged in a 56-BSSOP (7.50mm wide) surface-mount enclosure.

Application Specific Clock/Timing Feature Summary

• Generates CPU outputs up to 400MHz with cycle-cycle jitter < 85ps
• Provides SRC outputs with cycle-cycle jitter < 125ps for SATA/PCIe accuracy
• Includes 4 PCI outputs (33MHz) and 1 USB output (48MHz)
• Supports programmable spread spectrum frequency and percentage

Application Specific Clock/Timing Applications

• Mobile systems built with Intel P4-M processors
• Intel mobile chipset timing control
• Serial ATA interface clock generation
• PCI-Express interface clock generation

Application Specific Clock/Timing Procurement Notes

This component is obsolete and has been terminated by the manufacturer. Availability is limited to existing stock or secondary market sources. Verification of authenticity and condition is critical when sourcing from non-direct channels due to the end-of-life status.

Application Specific Clock/Timing Selection Notes

Designers requiring this specific clock profile must verify compatibility with legacy Intel P4-M platforms. New designs should consider modern alternatives as this part is discontinued. Ensure external crystal load capacitors are selected correctly for frequency tuning, as the device requires them for proper operation.

Application Specific Clock/Timing Part Context

The ICS954201 series belongs to Renesas' Timing Control Hub family, formerly associated with IDT before acquisition by SiTime. The product line was targeted at mobile computing applications during the early 2000s. The BFLF suffix indicates the 56-pin SSOP package variant with lead-free composition.

Application Specific Clock/Timing Replacement Considerations

SiTime has acquired the Renesas clock business. Consult SiTime.com for potential functional replacements or updated timing solutions compatible with legacy architectures.