What this 4Mbit asynchronous SRAM brings to the bus
The Infineon CY7C1041CV33-12VXC is a 4Mbit asynchronous SRAM organized as 256K x 16 bits, with a 12 ns access time that sets the timing budget for the memory bus.
12 ns access time — timing closure for the bus
It means the SRAM presents valid data within 12 ns of the address being asserted, which is fast enough to work with most 50-100 MHz processors without wait states, provided the board layout keeps trace lengths short and signal integrity clean.
Package and footprint — 44-SOJ surface mount
Housed in a 44-SOJ (Small Outline J-lead) package, this part is surface-mount with J-bend leads on a 0.400-inch body width. The 44-SOJ footprint is a standard pinout for 256K x 16 asynchronous SRAMs, so PCB layout is straightforward and the package is reworkable with standard hot-air tools.