The names of the programmable devices don't contain all characters, shown at the top of the chip or mentioned in the datasheet section part numbering. The names contain all characters necessary to identification of the device, but don't contain such codes, that have none influence to the programming, for example temperature code, speed code, packing type code, etc. . If such code letter is at the end of the name, is omitted, if such code letter is in the middle of name, then is replaced by character 'x'.

Examples:

1. Devices Am27C512-150, Am27C512-200 and Am27C512-250 are shown in the software only once, as Am27C512
2. S29GL064N11TF1010 device is shown in the software as S29GL064NxxTxx01