PI6C49018ZDIEX

Overview

The PI6C49018ZDIEX is a low-power networking clock generator designed for PCI-Express applications. It features four differential 100 MHz HCSL outputs, one 125 MHz LVCMOS output, and single-ended outputs at 66.66 MHz, 80 MHz, and 60 MHz. The device accepts a 25 MHz crystal or clock input and utilizes an SMBus interface for configuration. Key specifications include a 3.3 V supply voltage (3.135 V to 3.465 V), industrial temperature range (-40°C to +85°C), and spread spectrum modulation capability on the PCIe outputs.

Feature Summary

• Four differential 100 MHz PCI-Express outputs with low power HCSL structure
• Spread spectrum modulation on all 100 MHz outputs (-0.5% down spread) and selectable spread on the 80 MHz output
• Single-ended outputs including 125 MHz (LVCMOS), 66.66 MHz, 80 MHz, and 60 MHz
• SMBus serial interface for programmable control of outputs and spread spectrum settings

Applications

• PCI-Express clock generation
• Networking equipment timing
• Gigabit Ethernet systems requiring 125 MHz clock

Procurement Notes

Verify component status as the datasheet indicates 'OBSOLETE'. Confirm availability through authorized distributors or secondary markets. Check for Product Change Notifications (PCN) regarding manufacturing site or material changes. Ensure compatibility with existing PCB layouts due to the 40-TQFN package dimensions.

Selection Notes

Select this component when designing for PCI-Express Gen1/Gen2 interfaces requiring multiple clock domains. Ensure the design supports the required 25 MHz input frequency. Verify that the system can accommodate the specific output voltage levels (3.3 V for most outputs, 2.5 V for the 125 MHz output). Consider the SMBus address requirements for system integration.

Part Context

This part belongs to the Pericom (now Diodes Incorporated) PI6C490xx series of clock generators. The 'ZD' suffix denotes the 40-contact TQFN package, while 'E' indicates lead-free and green construction. The 'X' suffix specifies tape and reel packaging. This specific model integrates multiple clock functions into a single chip to reduce bill of materials cost.

Replacement Considerations

As the datasheet marks this component as obsolete, direct replacements may not be available from the original manufacturer. Evaluate alternative clock generators from Diodes Incorporated or other vendors that support PCIe and networking applications with similar pin counts and output configurations.