The Infineon CY7C1021CV26-15BAE is a 1 Mbit asynchronous SRAM organized as 64K words by 16 bits.
For a 16-bit processor running a 40 MHz bus (25 ns cycle), this SRAM leaves about 10 ns of margin for address decoding, PCB trace delay, and setup time — comfortable for a single-chip decode but tight if you cascade multiple peripherals on the same bus.
48-VFBGA package — what the layout engineer needs to know
The 48-VFBGA (6x8 mm) is a fine-pitch, 0.75 mm ball pitch BGA. Decoupling should sit directly under the BGA on the opposite side if the stack-up allows, or within 5 mm of the power balls. The 2.5 V to 2.7 V supply is narrow — a 2.5 V rail with ±2% regulation keeps you inside the window; a 2.5% regulator risks brownout on the low side at cold temperature.
Infineon lists the CY7C1021CV26-15BAE as obsolete. No direct drop-in successor is named in the available records. The 48-VFBGA package and narrow voltage range limit pin-compatible substitutes without a board spin.