4.2 Device Nomenclature

To designate the stages in the product development cycle, TI assigns prefixes to the part numbers of devices. Each commercial family member has one of three prefixes: X, P, or no prefix (for example, XRI-TRP-DR2B).These prefixes represent evolutionary stages of product development from engineering prototypes (with prefix X) through fully qualified production devices (with no prefix).

Device development evolutionary flow:

X – Experimental device that is not necessarily representative of the electrical specifications of the final device

P – Final device that conforms to the electrical specifications of the final product but has not completed quality and reliability verification

null – Fully qualified production device

Devices with a prefix of X or P are shipped against the following disclaimer:

"Developmental product is intended for internal evaluation purposes."

Production devices have been characterized fully, and the quality and reliability of the device have been demonstrated fully. TI's standard warranty applies.

Predictions show that prototype devices have a greater failure rate than the standard production devices. TI recommends that these devices not be used in any production system because their expected end-use failure rate still is undefined. Only qualified production devices are to be used.