SSTUB32868ET/S,518

Specialty Logic Overview

The NXP SSTUB32868ET/S,518 is a 1.8 V 28-bit 1:2 configurable registered buffer with parity for DDR2-800 RDIMM applications. It supports up to 450 MHz clock frequency and operates within a supply voltage range of 1.7 V to 2.0 V. The device integrates the functionality of two JEDEC-standard registers in a single package, supporting 2 rank by 4 DIMM density. It features a parity checking function across 22 input data bits and includes two additional chip select inputs. The component is packaged in a 176-ball TFBGA (6 mm × 15 mm) with a 0.65 mm ball pitch.

Specialty Logic Feature Summary

• Integrates equivalent functionality of two standard registers to support high-density memory designs
• Includes parity checking function with open-drain error output indication
• Configurable output drive strength selectable via hardware pin
• Features two additional chip select inputs for flexible enabling and disabling

Specialty Logic Applications

• High-density DDR2 registered DIMMs (400 MT/s to 800 MT/s)
• DDR2 Registered DIMMs requiring parity checking functionality
• Two rank by four (2R x 4) memory module designs

Specialty Logic Procurement Notes

Verify the specific suffix 'S' indicates an extended temperature range of 0 °C to +85 °C compared to the '/G' variant. Confirm the Pb-free solder compound specification matches system requirements. Ensure compatibility with the 176-ball TFBGA footprint during board layout. Check current availability status as this product may be discontinued or subject to last-time buy notices.

Specialty Logic Selection Notes

Select this component when designing high-density DDR2 modules requiring integrated parity checking and reduced board real estate. The '/S' suffix is required for applications operating up to 85 °C ambient temperature. Ensure the design accommodates the 176-ball TFBGA package dimensions. Verify that the 1.8 V supply voltage and SSTL_18 input levels align with the memory controller specifications.

Specialty Logic Part Context

This part belongs to the SSTU series of logic ICs designed specifically for memory subsystems. It serves as a specialized registered buffer intended to improve signal integrity and routing efficiency in complex memory architectures. The device replaces multiple discrete components, simplifying the design process for high-performance computing systems utilizing DDR2 technology.

Specialty Logic Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.