55 ns access — what it means for bus timing
The CY62128DV30LL-55SXIT: For a 16 MHz MCU with a 62.5 ns cycle, this SRAM fits a single-wait-state read; at 20 MHz (50 ns cycle) the access time forces a wait state or a slower clock on the memory bus. The write cycle time matches the read at 55 ns (word and page mode), so the bus timing budget is symmetric — no need to stretch the write pulse separately.
Supply range and standby current profile
The MoBL (More Battery Life) series is optimized for low standby current — relevant when this SRAM sits on a battery-backed bus or in a low-power data logger that keeps the memory powered during sleep.
Supplied in Bulk tube — not tape-and-reel — so it suits prototype runs and low-volume production where a pick-and-place feeder changeover is not justified.