MPC9449FA

Clock Buffers, Drivers Overview

The MPC9449FA is a 3.3V or 2.5V compatible clock fanout buffer designed for high-performance clock tree applications. It provides fifteen LVCMOS-compatible outputs with maximum frequencies up to 200 MHz and output skews under 200 ps. The device accepts two selectable LVCMOS inputs and one differential LVPECL input, featuring individually selectable divide-by-one or divide-by-two frequency dividers per output bank. Packaged in a 52-lead LQFP (CASE 848D), it supports ambient temperatures from –40°C to +85°C and drives up to thirty series-terminated clock lines.

Clock Buffers, Drivers Feature Summary

• Fifteen LVCMOS outputs with maximum frequency of 200 MHz and skew less than 200 ps
• Three input options: two selectable LVCMOS and one differential LVPECL
• Individual divide-by-one or divide-by-two frequency divider selection for four output banks
• High-impedance output control via MR/OE pin

Clock Buffers, Drivers Applications

• Networking equipment clock distribution
• Telecommunication system timing
• Computing infrastructure clock trees

Clock Buffers, Drivers Procurement Notes

Verify component authenticity as the original manufacturer is Motorola, now part of NXP Semiconductors. Confirm package integrity for the 52-lead LQFP format. Check datasheet revisions for any parameter updates. Ensure supply chain sources provide valid traceability documentation for this legacy component.

Clock Buffers, Drivers Selection Notes

Select the MPC9449FA when requiring a 1:15 fanout buffer with mixed LVCMOS/LVPECL input support. Choose this part over the MPC949 for enhanced performance metrics while maintaining pin compatibility. Verify that the 52-lead LQFP footprint fits the target PCB layout constraints.

Clock Buffers, Drivers Part Context

The MPC9449FA is a performance-enhanced successor to the MPC949, offering improved electrical characteristics while remaining pin and function compatible. Originally manufactured by Motorola, the product line was transferred to NXP Semiconductors following corporate acquisitions. The 'FA' suffix specifically denotes the 52-lead LQFP packaging variant.

Clock Buffers, Drivers Replacement Considerations

The MPC949 serves as a direct functional substitute with identical pinouts but lower performance specifications. No other public cross-model replacements are documented in the provided source material.