Technical content and expertise to help jump start your design and get you to production faster.
Start your designDownload our latest development and embedded software solutions.
Expedite time-to-market with our extensive lineup of development kits.
Jump-start your design with proven hardware and software solutions.
Get the latest specifications in our technical documentation library.
Further your technical expertise with online and in-person instruction.
Get comprehensive paid support to fast-track your product development.
Design ideas, demo videos, quality answers. Connect with NXP professionals and other knowledgeable designers ready to help.
Software, documentation, evaluation tools. The resources to build comprehensive solutions and accelerate your time to market.
Access our design resource libraryWe're always looking for passionate and talented people to work with us.
Join our teamArchived content is no longer updated and is made available for historical reference only.
The SSTU32866 is a 1.8 V configurable register specifically designed for use on DDR2 memory modules requiring a parity checking function. It is defined in accordance with the JEDEC JESD82-7 standard for the SSTU32864 registered buffer, while adding the parity checking function in a compatible pinout. The JEDEC standard for SSTU32866 is pending publication. The register is configurable (using configuration pins C0 and C1) to two topologies: 25-bit 1:1 or 14-bit 1:2, and in the latter configuration can be designated as Register A or Register B on the DIMM.
The SSTU32866 accepts a parity bit from the memory controller on its parity bit (PAR_IN) input, compares it with the data received on the DIMM-independent D-inputs and indicates whether a parity error has occurred on its open-drain QERR pin (active-LOW). The convention is even parity, that is, valid parity is defined as an even number of ones across the DIMM-independent data inputs combined with the parity input bit.
The SSTU32866 is packaged in a 96-ball, 6 x 16 grid, 0.8 mm ball pitch LFBGA package (13.5 mm by 5.5 mm).