When researching, be aware that "B58944" appears in other unrelated contexts:

Remember: The B58944 might be on a board. ElektroTanya is a free repository of repair manuals. Search for the device name (e.g., "NEC TV Model XYZ") rather than the chip. The schematic inside will show the B58944 pinout.

: The B58944 is an "empty" chip; it provides the physical memory space but does not come with pre-loaded program data. : It is often listed as Lead-free/RoHS compliant in modern replacement inventories. timing characteristics for this memory chip?