AD9571ACPZPEC-R7

Overview

The AD9571ACPZPEC-R7 is an Ethernet clock generator featuring a fully integrated VCO/PLL core optimized for line card applications. It provides ten clock outputs: six 25 MHz CMOS, one 33.33 MHz CMOS, and four differential LVDS or LVPECL signals (156.25 MHz, 100/125 MHz). Operating on a single 3.3 V supply within the -40°C to +85°C range, it achieves 0.17 ps rms jitter at 156.25 MHz from 1.875 MHz to 20 MHz. The device utilizes preset divide ratios and strapping pins for configuration, eliminating external loop filter components.

Feature Summary

• Integrated VCO/PLL with 0.17 ps rms jitter at 156.25 MHz
• Ten outputs including six 25 MHz CMOS and differential LVDS/LVPECL pairs
• Preset frequencies of 156.25 MHz, 125 MHz, 100 MHz, and 33.33 MHz
• Space-saving 40-lead LFCSP package

Applications

• Ethernet line cards
• Network switches and routers
• SCSI, SATA, and PCI-express systems

Procurement Notes

Verify the suffix R7 indicates reel packaging when sourcing this specific part number. Confirm the output format matches the required LVDS or LVPECL specification, as these are factory-programmed options. Ensure the ordering suffix PEC corresponds to the correct package variant for the application design.

Selection Notes

Select based on the required output format, as LVDS and LVPECL versions have distinct power dissipation values of 0.48 W and 0.69 W respectively. Use FREQSEL strapping to configure the 100 MHz or 125 MHz output frequency. Consider the 33.33 MHz CMOS noise impact on adjacent differential pins if operating at 125 MHz.

Part Context

This component belongs to the Analog Devices AD9571 family of Ethernet clock generators. The AD9571ACPZPEC-R7 specifically denotes the reel-packaged version of the device in the 40-lead LFCSP form factor. It shares the same functional block diagram and electrical specifications as the tray-packaged AD9571ACPZPEC.

Replacement Considerations

The AD9572 serves as a related model for Fiber Channel applications. Verify pin compatibility and output count differences before substitution.