CY7C421

CY7C421512 × 9 Asynchronous FIFO CY7C421 512 × 9 Asynchronous FIFO 512 × 9 Asynchronous FIFO Features ■ Asynchronous First-In First-Out (FIFO) Buffer Memories ❐ 512 × 9 (CY7C421) ■ Dual-Ported RAM Cell ■ High Speed 50 MHz Read and Write Independent of Depth and Width ■ Low Operating Power: ICC = 35 mA ■ Empty and Full Flags (Half Full Flag in Standalone) ■ TTL Compatible ■ Retransmit in Standalone ■ Expandable in Width ■ PLCC, 7 × 7 TQFP, 300-Mil Molded SOJ ■ Pb-free Packages Available ■ Pin Compatible and Functionally Equivalent to IDT7201, and AM7201 Functional Description The CY7C421 is a first-in first-out (FIFO) memory offered in 300-mil wide SOJ, TQFP & PLCC packages and it is 512 words by 9 bits wide. Each FIFO memory is organized such that the data is read in the same sequential order that it was written. Full and empty flags are provided to prevent overflow and underflow. Three additional pins are also provided to facilitate unlimited expansion ...