SSTU32865ET/G,518

Specialty Logic Overview

The SSTU32865ET/G,518 is a 1.8 V 28-bit 1:2 registered buffer designed for high-density DDR2 memory modules. It integrates the functionality of two standard JEDEC registers into a single package to support 2R x 4 DIMM designs. The device includes parity checking across 22 input data bits and features controlled output impedance drivers. It operates with a maximum clock frequency of 450 MHz and accepts differential clock inputs. The component is housed in a 160-ball TFBGA package with a 0.65 mm ball pitch.

Specialty Logic Feature Summary

• Integrates equivalent functionality of two JEDEC-standard DDR2 registers within a single package
• Includes parity checking function that compares input parity bit with received data
• Supports Chip Select gating to minimize power consumption by controlling data output states
• Features open-drain parity error output for error indication

Specialty Logic Applications

• High-density DDR2 registered DIMMs
• DDR2 Registered DIMMs requiring parity checking functionality

Specialty Logic Procurement Notes

Verify the specific ordering suffix ET/G indicates Pb-free solder ball compound (SnAgCu) as distinct from the ET variant which uses SnPb. Confirm the package version matches SOT802-1 specifications. Ensure compatibility with the required 1.8 V supply voltage and SSTL_18 input standards before integration into the design.

Specialty Logic Selection Notes

Select this component when board real estate is limited and the design requires the density of a 2R x 4 configuration. It is suitable for applications needing integrated parity error detection without using multiple discrete register components. Ensure the system supports differential clock inputs and LVCMOS control levels for proper operation.

Specialty Logic Part Context

This part belongs to the NXP DDR2 registered buffer family, specifically engineered for RDIMM applications. It serves as a direct functional replacement for dual-register configurations, simplifying routing on high-density memory modules. The device complies with JEDEC standard JESD82-9 for DDR2 registration requirements.

Specialty Logic Replacement Considerations

Public confirmed substitutes include SSTU32864 or SSTU32866 used in pairs to replicate the 28-bit functionality. Verify pinout compatibility and electrical characteristics when substituting with these individual 14-bit registers.