I can see stocks for STM32F100C6T6B but No stocks for STM32F100C6T6B TR. Where TR means Tape and Real, But Data Sheet Suffix options are two.1 is ***= programmed parts; 2 is TR =tape and real, So does No suffix means we need to consider "***" as suff

[AAnan.6]

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[Bob S]

Part numbers without the TR are typically shipped in trays instead of tape and reel. The "-***" means the part number ends in some alpha-numeric string that is unique to that customer's custom firmware that is pre-programmed into the chip,