正品CY74FCT2257CTQC CY74FCT2257ATQC CY74FCT2257ATPC

贴插SDT9993-TC-F360-CY74FCT2257ATPC-SDT9993-TC-F250-B

贴片直插CY74FCT2244ATQC，CY74FCT2257ATPC，CY74FCT2257CTPC