ICS557G-03LFT – INTEGRATED DEVICE TECHNOLOGY

The ICS557G-03LFT, manufactured by IDT, is a clock source integrated circuit specifically designed for PCI Express (PCIe) applications. Housed in a 16-TSSOP (Thin Shrink Small Outline Package), this device generates PCIe-compliant reference clock signals. Its primary function is to provide a stable and low-jitter clock signal required for PCIe Gen1/Gen2/Gen3 communication. The device typically utilizes a fundamental mode crystal or external reference clock input to produce the required differential output clock signals, commonly at 100 MHz. Internal phase-locked loop (PLL) circuitry ensures low phase noise and jitter performance, critical for maintaining data integrity in high-speed PCIe interfaces. Power supply requirements are typically 3.3V. The ICS557G-03LFT is often used in motherboards, add-in cards, and embedded systems requiring PCIe connectivity.