PI6CU877NFE

Overview

The PI6CU877NFE is a zero-delay PLL clock driver designed for registered DDR2 DIMM applications. It operates at 1.8V and distributes one differential clock input pair to eleven differential output pairs, including feedback outputs. The device supports SSTL-18 levels with a maximum application frequency of 270MHz. Key electrical parameters include a supply voltage range of 1.7V to 1.9V and an operating temperature range of 0°C to 70°C. It features low skew and jitter performance, capable of tracking spread spectrum clocking (SSC) for EMI reduction.

Feature Summary

• Zero-delay buffer distributing one differential input to eleven differential output pairs
• Optimized for DDR2-667/533/400 SDRAM applications with 1.8V operation
• Supports Spread Spectrum Clocking (SSC) for reduced EMI
• Includes external feedback pins (FBIN, FBIN) for synchronization

Applications

• Registered DDR2 DIMM memory modules
• DDR2-533/400 system designs
• High-performance memory controller interfaces

Procurement Notes

This component is identified as obsolete by the manufacturer and is scheduled for discontinuation. Availability is restricted, and sourcing may be limited to existing stock or third-party distributors. Verify end-of-life status and lead times carefully before integration into new designs.

Selection Notes

Select the PI6CU877NFE specifically for DDR2-533/400 applications requiring a 1:10 differential clock distribution. For higher speed requirements up to DDR2-667, consider the PI6CUA877 variant instead. Ensure the design accommodates the 52-ball VFBGA package and 1.8V power domain constraints.

Part Context

The PI6CU877NFE belongs to the PI6CUx877 family of PLL clock drivers developed for memory subsystems. It is manufactured by Diodes Incorporated (formerly Pericom). The 'NFE' suffix indicates a Pb-free and Green packaging option in a 52-ball VFBGA format.

Replacement Considerations

The PI6CUA877NFE is the primary functional substitute within the same family, offering support for DDR2-667 speeds. Both devices share identical pinouts and packaging.