4 Mbit asynchronous SRAM in a 36-ball VFBGA
The Infineon CY62148EV30LL-45BVXI is a 4 Mbit asynchronous SRAM from the MoBL® series, organized as 512K x 8 bits. The 36-ball VFBGA (6x8 mm) package keeps the footprint small, but the fine-pitch BGA demands careful PCB layout — route the address and data lines with matched trace lengths and place decoupling caps within 2 mm of each VDD ball.
45 ns access time — timing margin for slower buses
For a microcontroller or FPGA memory controller running at 20 MHz (50 ns cycle), this leaves only 5 ns of margin before setup — tight. If your bus runs at 16.67 MHz (60 ns cycle), you have 15 ns of margin, which is comfortable. If the controller is faster than 20 MHz, consider a 10 ns SRAM like the CY7C1041GN30-10BVXI instead.
The 2.2V to 3.6V supply range means it can run from a 3.3V rail (typical) or a 2.5V rail without a separate regulator — useful in dual-voltage systems where the core logic is 1.8V but the I/O bank is 3.3V.
Package and footprint — 36-VFBGA layout notes
The 36-ball VFBGA (6x8 mm) has a 0.5 mm ball pitch. That is fine enough that a standard 0.8 mm via between balls won't fit — use microvias or via-in-pad with filled and capped vias. The supplier device package is 36-VFBGA (6x8), so the footprint is the same across the MoBL family.