SSTU32865 1.8 V 28-bit 1:2 Registered Buffer With Parity For DDR2 RDIMM Applications

The SSTU32865 is a 1.8 V 28-bit 1:2 Register specifically designed for use on two rank by four (2R x 4) and similar high-density Double Data Rate 2 (DDR2) memory modules. It is similar in function to the JEDEC-standard 14-bit DDR2 Register but integrates the functionality of the normally required two Registers in a single package, thereby freeing up board real-estate and facilitating routing to accommodate high-density Dual In-line Memory Module (DIMM) designs. The SSTU32865 also integrates a parity function, which accepts a parity bit from the Memory controller compares it with the data received on the D-inputs and indicates whether a parity error has occurred on its open-drain PTYERR pin (active-LOW). The SSTU32865 is packaged in a 160-ball, 12 x 18 grid, 0.65 mm ball pitch, thin profile fine-pitch ball grid array (TFBGA) package, which-while requiring a minimum 9 mm x 13 mm of board space-allows for adequate signal routing and escape using conventional card technology.
By NXP Semiconductors