This standard provides the functional definition, ball-out configuration and package outline, signal definitions and input/output characteristics for a 28-bit 1:2 registered driver with parity suitable for use on DDR2 RDIMMs. The SSTU32865 integrates the functional equivalent of two SSTU32864 devices (as defined in JESD82-7) into a single device, thereby easing layout and board design constraints especially on high density RDIMMs such as dual rank, by four configurations. Moreover, the optional use of a parity function is provided for, permitting detection and reporting of parity errors across its 22 data inputs. JESD82-9 specifies a 160-pin Thin-profile, fine-pitch ball-grid array (TFBGA) package.