The Cypress CY7C4421-10JXCT is a synchronous FIFO memory from the CY7C series, organized as 64 words by 9 bits (576 bits total). The part is uni-directional, supports depth and width expansion, and includes programmable flags — but no retransmit or FWFT (First-Word Fall-Through) capability. Typical applications include data buffering in telecom line cards, networking equipment, and high-speed data acquisition systems where a moderate-depth synchronous buffer is needed at 5 V logic levels.
100 MHz clock and 8 ns access — timing margin in the system
The 100 MHz data rate sets the maximum write/read cycle frequency. In a 100 MHz system (10 ns period), the 8 ns access leaves 2 ns of setup margin for the receiving device — tight, so board trace length and loading need attention.
32-PLCC footprint and surface-mount assembly
The 32-PLCC (J-Lead) package measures 11.43 x 13.97 mm (supplier device package). The J-Lead form factor is common for PLCC sockets or direct solder; reflow profile follows standard JEDEC for PLCC.