874003AG-04LFT

Overview

The Renesas 874003AG-04LFT is a PCI Express jitter attenuator from the FemtoClock series, designed to reduce high-frequency random and deterministic jitter in PCIe systems. It features a differential LVDS output pair and supports multiple input types including LVPECL, LVDS, LVHSTL, SSTL, and HCSL. The device operates with an output frequency range of 98MHz to 320MHz and utilizes a 3MHz PLL loop bandwidth for effective jitter attenuation while tracking spread-spectrum clocking profiles. Packaged in a lead-free 20-TSSOP, it functions within a -40°C to 85°C ambient temperature range on a 3.3V supply.

Feature Summary

• Differential-to-LVDS jitter attenuation with 3MHz PLL loop bandwidth
• Supports PCI Express Spread-Spectrum Clocking (SSC)
• Input compatibility: LVPECL, LVDS, LVHSTL, SSTL, HCSL
• Output frequency range: 98MHz to 320MHz

Applications

• PCI Express add-in cards
• Desktop PC motherboard clock distribution
• Systems requiring low phase noise clock synthesis

Procurement Notes

This component is listed as obsolete. Verification of current availability requires checking distributor stock status directly, as inventory levels change frequently. Ensure the specific suffix 'LFT' corresponds to the tape-and-reel packaging variant if required for automated assembly processes.

Selection Notes

Select this part when designing for space-constrained applications like PCIe add-in cards due to its 20-lead TSSOP package. It is suitable for systems needing to clean up clocks generated by low-bandwidth, high-phase-noise PLL synthesizers. Verify that the input signal type matches one of the supported formats (LVPECL, LVDS, etc.).

Part Context

The 874003AG-04LFT belongs to the FemtoClock family, which employs third-generation PLL technology to achieve minimal phase noise. It serves as a specialized interface solution for maintaining signal integrity in high-speed serial communication standards like PCI Express, addressing jitter issues inherent in system board clock generation.

Replacement Considerations

The datasheet lists the 874003I-02 as a related product in the same category. However, both parts are marked obsolete. No direct active substitute is confirmed in the provided documentation; alternative selection should focus on newer FemtoClock generations or compatible jitter attenuators from the manufacturer's current portfolio.