Active 5 V asynchronous SRAM for legacy bus designs
The CY62128BNLL-70SXCT is an Infineon MoBL® series 1 Mbit asynchronous SRAM organized as 128K x 8 bits, with a 70 ns access time and parallel interface.
70 ns access and write cycle timing
Both the address-to-data access time and the write cycle time (word, page) are specified at 70 ns. This means the memory can complete a read or write operation within 70 ns of the address or control signal transition, which sets the bus cycle budget for the host controller. In a system running with a 10 MHz bus clock (100 ns cycle), the 70 ns access leaves 30 ns of margin for address decode, data setup, and board-level propagation delay. Designers should verify that the combined timing of the memory controller output delay plus the SRAM access time meets the required data setup window at the receiver.
Commercial temp grade and 32-SOIC wide-body package
It is not qualified for industrial or automotive under-hood duty. The 32-SOIC wide-body package (0.445-inch body width, 11.30 mm) is a JEDEC-standard footprint that reflows on a standard surface-mount line. The wide body allows easier manual rework and inspection compared to finer-pitch packages.