PI6C557-05BLE

Overview

The PI6C557-05BLE is a spread spectrum clock generator compliant with PCI Express 3.0 and Ethernet requirements, designed to reduce electromagnetic interference in PC or embedded systems. It features a patented Phase-Locked Loop (PLL) that accepts a 25MHz crystal input to produce four pairs of differential outputs at selectable 100MHz or 200MHz frequencies. The device supports HCSL and LVDS output configurations with spread selection options of -0.5%, -1.0%, -1.5%, or no spread. Operating on a 3.3V supply within the industrial temperature range of -40°C to +85°C, it utilizes external pins for frequency and spread configuration.

Feature Summary

• PCIe 3.0 compliant with low phase jitter (0.48ps RMS typical at high bandwidth).
• Generates four differential output pairs (HCSL or LVDS) from a single 25MHz crystal input.
• Configurable spread spectrum modulation (-0.5%, -1.0%, -1.5%) via S0-S2 pins.
• Supports both 100MHz and 200MHz output frequencies selected by hardware.

Applications

• PCI Express 3.0 compliant system clock generation.
• Ethernet interface clock distribution.
• PC and embedded system EMI reduction.

Procurement Notes

Verify the 'X' suffix indicates Tape/Reel packaging when ordering. Confirm the 'E' suffix denotes lead-free and green material compliance. Ensure the specific package code matches the required 20-TSSOP form factor for PCB layout compatibility.

Selection Notes

Select this model for applications requiring four differential clock outputs derived from a 25MHz reference. Verify that the target system operates within the 3.135V to 3.465V supply voltage range. Ensure the design accommodates the required external termination resistors for HCSL or LVDS signaling standards.

Part Context

This component belongs to the PI6C557 series of PCIe clock generators manufactured by Diodes Incorporated. The 'BLE' suffix specifically identifies the 20-pin TSSOP package variant with lead-free/green materials and tape/reel packaging, distinguishing it from tube-packaged versions.

Replacement Considerations

Direct replacements within the same family include other PI6C557 variants differing primarily in package type (e.g., QSOP) or output count. Verify pinout compatibility and electrical specifications before substituting.