CY7C1049DV33 - 4-Mbit (512K x 8) Static RAM
The CY7C1049DV33 is a high performance CMOS Static RAM organized as 512K words by 8-bits.
Easy memory expansion is provided by an Active LOW Chip Enable (CE), an Active LOW Output Enable (OE), and tri-state drivers.
You can write to the device by taking Chip Enable (CE) and Write Enable (WE) inputs