MPC905EFR2

Clock Buffers, Drivers Overview

The MPC905 is a 1:6 PCI clock generator and fanout buffer designed for 3.3 V or 5.0 V PCI environments. It operates from a single 3.3 V supply (functional range 3.0 V to 3.6 V) and accepts either an external crystal or a TTL input signal. The device provides six low-skew LVCMOS outputs capable of driving up to 12 clock loads, effectively functioning as a 1:12 fanout buffer when driving series-terminated transmission lines. Maximum operating frequency reaches 100 MHz with an external clock source. Key features include synchronous output enables for power management and 5.0 V tolerant inputs.

Clock Buffers, Drivers Feature Summary

• Six low-skew LVCMOS outputs supporting up to 100 MHz operation
• Synchronous enable inputs (ENABLE1, ENABLE2) for controlled power management
• Flexible input interface accepting external crystals or TTL signals
• 5.0 V tolerant inputs allowing compatibility with 5.0 V logic levels

Clock Buffers, Drivers Applications

• PCI bus clock generation in 3.3 V or 5.0 V systems
• Processor bus clock distribution
• High-performance clock networks requiring point-to-point transmission line termination

Clock Buffers, Drivers Procurement Notes

The MPC905 has been discontinued by the manufacturer. The last time buy expired on December 7, 2013. Verification of current availability requires checking secondary market distributors, as original stock is no longer produced. Designers should consider replacement components for new projects.

Clock Buffers, Drivers Selection Notes

Select the MPC905 for legacy PCI designs requiring a single-chip solution for clock generation and distribution. Ensure the design utilizes a 3.3 V supply voltage. Verify that the application can accommodate the 16-lead SOIC package. For new designs, evaluate the recommended replacement part ICS83905 if functional equivalence is required.

Clock Buffers, Drivers Part Context

The MPC905 was manufactured by Integrated Device Technology, Inc. (IDT). IDT was acquired by Renesas Electronics Corporation. Consequently, this component is now associated with the Renesas product portfolio, although it remains a legacy IDT part number.

Clock Buffers, Drivers Replacement Considerations

The datasheet explicitly identifies the ICS83905 as a replacement part for the MPC905.