UTF-16

UTF-16 (UCS Transformation Format, 16-bit form) is a fixed-length encoding of the Unicode standard using 16-bit sequences, where all characters are 2 bytes long. As with UTF-8, code values beyond the BMP are represented using surrogate pairs that require 4 bytes.

Both Replication Server and Adaptive Server encode three character datatype values in UTF-16:

unichar – fixed-width Unicode.
univarchar – variable-width Unicode.
unitext – variable-width Unicode large object datatype introduced with ASE 15.0 and Replication Server 15.0. unitext can hold up to 1,073,741,823 Unicode characters or the equivalent of 2,147,483,647 bytes.