10 ns async SRAM for 5 V legacy buses
The 10 ns access time means it can service a 66 MHz bus without wait states — at 100 MHz you'd need to budget one wait state for back-to-back reads.
512K x 8 — byte-wide bus fit
The 512K x 8 organization is a straight byte-wide memory, ideal for 8-bit microcontrollers (8051, PIC, AVR) or as a data buffer in 8-bit mode on a 16/32-bit bus. If your design needs 16-bit word access, you would pair two of these or look at the 256K x 16 sibling CY7C1041G-10ZSXIT. The parallel interface is straightforward — address, data, chip enable, output enable, write enable — no clocked handshake, no refresh cycle to manage.
36-SOJ package — reflow and footprint notes
The 36-SOJ package (36-pin Small Outline J-lead, 10.16 mm body width) is a surface-mount form factor with J-bend leads tucked under the body. The J-bend also makes visual inspection of the solder joint harder; if your AOI system is set up for gull-wing only, you may need to adjust the inspection algorithm or add an X-ray spot-check.
It is ROHS3 compliant. For dual-sourcing flexibility, the CY7C1049G30-10VXIT is a functional equivalent with the same 4 Mbit density and 10 ns access time, but operates at 2.2 V supply — verify your 5 V rail can tolerate the lower voltage before substituting.