55 ns access time — bus timing margin at 2.2 V
The Cypress CY62148DV30LL-55BVXI is a 4Mbit (512K x 8) parallel SRAM from the MoBL® series, organized as a byte-wide memory with a 55 ns access time. The 55 ns access time is the critical timing parameter for read cycles: it defines how quickly data appears on the bus after the address is valid, and it must be met by the memory controller's setup/hold window. At 2.2 V, the internal sense amps are slower than at 3.3 V, so the 55 ns figure is the worst-case guarantee across temperature and voltage — a designer should budget at least 5 ns margin beyond that for signal-integrity degradation on a loaded parallel bus.
Package and footprint — 48-VFBGA
The part comes in a 48-ball VFBGA (Very Fine-Pitch Ball Grid Array) package, surface-mount only. The package is RoHS-compliant and lead-free per the listing.
That means no last-time-buy pressure and normal lead times through distribution.