841S012BKILF

Overview

The ICS841S012I is a crystal-to-0.7V differential HCSL/LVCMOS frequency synthesizer designed for PCIe, sRIO, and Gigabit Ethernet applications. It utilizes a 25MHz parallel resonant crystal to generate output frequencies ranging from 33.33MHz to 200MHz. The device features a 2GHz VCO and supports spread spectrum clocking with ±0.25% center-spread or -0.5% down-spread options. It includes two differential HCSL outputs in Bank A (100MHz–250MHz) and eight LVCMOS/LVTTL outputs across Banks B and C (33.33MHz–200MHz). The component operates on a full 3.3V supply with an RMS period jitter of 15ps typical for QB outputs.

Feature Summary

• Two 0.7V differential HCSL outputs configurable for PCIe (100/250MHz) and sRIO (100/125MHz)
• Eight LVCMOS/LVTTL outputs with 15Ω typical impedance and two REF_OUTs with 20Ω impedance
• Supports selectable 25MHz crystal or single-ended LVCMOS/LVTTL reference clock input
• Spread spectrum capability: ±0.25% center-spread and -0.5% down-spread via SSC pins

Applications

• PCIe clock generation
• sRIO clock generation
• Gigabit Ethernet synchronization
• High-speed communication processor clock inputs

Procurement Notes

Verify the RoHS compliance status by checking the ordering suffix; 'FL' indicates lead-free packaging while other suffixes may indicate standard RoHS 5. Confirm the package type is 56-lead VFQFN (8mm x 8mm x 0.925mm body). Ensure the ambient operating temperature range meets requirements of -40°C to 85°C. Cross-reference the specific revision level (Rev A) if historical compatibility is critical.

Selection Notes

Select this component when a single solution is needed to replace multiple oscillators and fanout buffers. Ensure the design accommodates separate power supplies (VDD, VDDA, VDDOB, VDDOC) for optimal jitter performance. Verify that the load conditions match the specified output impedances: 15Ω for LVCMOS/LVTTL outputs and appropriate termination for the 0.7V HCSL differential pairs. Check thermal constraints as total power dissipation can exceed 1W with all outputs loaded.

Part Context

The ICS841S012I belongs to the HiPerClockS family of high-performance clock solutions originally developed by Integrated Device Technology (IDT), which was later acquired by Renesas Electronics Corporation. This device serves as a specialized frequency synthesizer optimized for high-speed serial interface standards, providing low-jitter clock signals required for reliable data transmission in networking and industrial equipment.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Users should consult official manufacturer resources for current equivalent models within the HiPerClockS portfolio.