10 ns access — bus-margin and timing-closure note
For a 100 MHz bus (10 ns period), that leaves zero margin for a back-to-back read without a wait state; at 66 MHz (15 ns period) you have 5 ns of slack for PCB trace delay and setup time on the controller. If your controller runs at 133 MHz or above, consider a synchronous SRAM or a pipelined asynchronous part with a faster access spec.
48-VFBGA footprint — routing and rework considerations
The 48-ball VFBGA (6 × 8 mm) is a fine-pitch BGA — the ball pitch is typically 0.5 mm or 0.65 mm depending on the exact ball-map variant. That requires micro-via or via-in-pad for the inner rows, and a four-layer PCB minimum to route the 16 data lines plus address and control signals. Hand-soldering is impractical; rework needs a hot-air station with a BGA nozzle.
Infineon lists the CY7C1061G30-10BV1XIT as Active (current production). For dual-sourcing resilience, the base product number CY7C1061 covers multiple speed and package variants; the '10BV1XIT' suffix identifies this specific 10 ns, 48-VFBGA, tape-and-reel option.