ICS841S04BGILF

Overview

The ICS841S04BGILF is a PLL-based clock generator designed for PCI Express applications. It generates a 100MHz HCSL clock from a 25MHz reference input, supporting crystal oscillators or external sources. The device features four differential 0.7V current mode HCSL output pairs with a maximum RMS period jitter of 3ps and cycle-to-cycle jitter of 35ps. It includes spread spectrum capabilities for EMI reduction via an I2C interface. Operating on a 3.3V supply (3.135V to 3.465V), it functions within -40°C to +85°C ambient temperature in a 24-lead TSSOP package.

Feature Summary

• Four differential 0.7V current mode HCSL output pairs
• Maximum RMS period jitter of 3ps and cycle-to-cycle jitter of 35ps
• I2C support with readback capabilities up to 400kHz for spread spectrum control
• Integrated 25MHz crystal oscillator interface

Applications

• PCI Express clock generation
• Systems requiring low jitter clock distribution
• Applications needing EMI reduction through spread spectrum

Procurement Notes

Verify the RoHS compliance status corresponding to the specific suffix, as documentation indicates availability in both standard (RoHS 5) and lead-free (RoHS 6) packages. Confirm the package type matches the required 24-TSSOP form factor. Ensure the ordering suffix aligns with the desired environmental rating and packaging configuration.

Selection Notes

Select this component when a single 1:4 ratio clock generator is needed for PCIe designs. It supports both internal crystal oscillators and external references. The device requires separate power supplies for VDD_REF, VDD_SRC, and VDDA to isolate noise. Use the I2C interface to configure spread spectrum modes if EMI mitigation is required.

Part Context

The ICS841S04I belongs to the HiPerClockS family of clock synthesizers. Originally manufactured by Integrated Device Technology (IDT), the product line was acquired by Renesas Electronics Corporation. The device is specifically optimized for high-speed serial link clocking requirements found in modern computer architectures.

Replacement Considerations

Check for updated part numbers under the Renesas portfolio. Verify pin compatibility and electrical specifications against any alternative clock generators. Ensure that any substitute maintains the 24-TSSOP package and 100MHz output frequency capability.