10 ns access time — bus margin for a 5 V system
The Infineon CY7C1061GE-10BVJXI is a 16 Mbit asynchronous SRAM organized 1M x 16, meaning it presents a full 16-bit word on every read cycle without byte-lane multiplexing. In a system with a 5 V bus running at, say, 66 MHz, that 10 ns buys enough margin to avoid wait states on back-to-back reads, provided the bus turnaround timing is clean.
The 48-VFBGA (6x8 mm) package saves about 40% board area versus a 44-pin TSOP, but the fine-pitch balls (0.75 mm typical) demand a controlled reflow profile and post-assembly X-ray inspection for voiding and solder-ball shorts.
That said, the 5 V asynchronous SRAM market is a shrinking niche — most new designs have moved to 3.3 V or 1.8 V synchronous SRAMs or PSRAM. During allocation cycles, lead times on this class of part can stretch, so it pays to secure committed volume through a distributor rather than relying on spot buys.