PI6C21200AE

Overview

The PI6C21200AE is a high-speed, low-noise PCIe differential clock buffer designed for Intel chipsets. It distributes twelve pairs of HCSL-compatible differential clocks with a maximum frequency of 400 MHz. The device supports a 3.3V supply voltage (3.135V to 3.465V) and operates within a commercial temperature range of 0°C to 70°C. Key electrical parameters include output-to-output skew less than 50 ps and cycle-to-cycle jitter under 50 ps. It features programmable PLL bandwidth, gear ratios, and individual output enable controls via hardware pins or SMBus interface.

Feature Summary

• Distributes twelve pairs of differential HCSL-compatible PCIe clocks
• Supports input frequencies up to 400 MHz with <50ps skew and jitter
• Configurable via SMBus for gear ratios, output enables, and power management
• Operates on a single 3.3V supply with commercial temperature rating

Applications

• Intel PCI Express chipset clock distribution
• High-speed server and workstation motherboard designs
• PCIe switch and endpoint clock buffering

Procurement Notes

Verify the 'AE' suffix indicates a Pb-Free and Green package in the 56-pin TSSOP format. Confirm that the specific revision matches the required thermal and mechanical specifications for the target PCB layout. Ensure compatibility with the intended SMBus controller protocol for configuration.

Selection Notes

Select this component when a 1:12 fan-out ratio is required for PCIe reference clocks. It is suitable for systems needing programmable gear ratios to support various CPU input frequencies. Verify that the 0°C to 70°C operating range meets the environmental requirements of the application.

Part Context

This part belongs to the PI6C21xxx series of PCIe clock buffers. It is typically paired with synthesizers like the PI6C410B to provide complete clock generation solutions for complex chipset architectures requiring multiple synchronized differential clock domains.

Replacement Considerations

Check datasheets for other PI6C21xxx variants (e.g., different pin counts or ratios) if the 1:12 configuration does not match the design needs. Ensure any substitute maintains the same HCSL signaling standard and SMBus compatibility.