MoBL® 2Mbit async SRAM — what it is and where it fits
The Cypress CY62136EV30LL-45BVXIT is a 2Mbit asynchronous SRAM from the MoBL® series, organized as 128K x 16 bits. It is a volatile memory with a parallel interface and a 45 ns access time, intended for use as fast scratchpad, buffer, or cache memory in embedded systems where deterministic read/write timing matters more than density. The 48-VFBGA (6x8 mm) package is a fine-pitch BGA — this is a reflow-oven part, not a field-swap candidate. Plan for X-ray inspection on the first build; the footprint is tight enough that a misaligned stencil shows up as solder-bridge shorts on the inner rows.
45 ns access time — what it means for the bus
45 ns access time sets the wait-state budget for the memory controller. Write cycle time matches at 45 ns, so bus turnaround is symmetric. Write cycle time matches the read access at 45 ns, so the bus turnaround is symmetric — no hidden penalty on mixed read-write sequences. The asynchronous interface means no clock to route; just address, data, chip-enable, and write-enable lines to the controller.
Lifecycle and sourcing reality
The CY62136EV30LL-45BVXIT carries an Active product status — no last-time-buy notice, no NRND flag. It is a current-production line, so new designs can commit it without an obsolescence watch. The ROHS3 compliance means no exemption paperwork for EU-market equipment.