4Mbit asynchronous SRAM in 44-SOJ
The 71V416S15YG is a 4Mbit asynchronous SRAM organized as 256K x 16 bits, with a 15 ns access time.
15 ns access time and write cycle
The 15 ns access time and 15 ns write cycle time (word, page) mean the part can keep up with a 66 MHz bus without inserting wait states, but at higher clock rates the memory controller must account for the address-to-data setup window. The 15 ns write cycle covers both word and page modes, so burst writes to sequential addresses are handled at the same speed as single-word writes — useful for filling a line buffer or updating a lookup table.
Active production and supply posture
The 44-BSOJ package (0.400-inch body width, 10.16 mm) is a JEDEC-standard SOJ footprint. Confirm the date code and bake if the floor life has been exceeded — a popcorn event in a narrow SOJ can crack the mould compound and lift the bond wires.