Active-production parallel NOR flash for embedded code storage
The Cypress S29GL256S11FHIV20 is a 256 Mbit parallel NOR flash memory from the GL-S family, organized as 16M x 16 bits. This part is housed in a 64-ball FBGA package and is intended for code-shadowing, firmware storage, and data-logging in embedded systems where reliable random-access read performance and long-term data retention are required.
The 110 ns access time is the random-read cycle time from address latch to valid data on the bus. For a host controller running at, say, 50 MHz (20 ns period), the flash read cycle takes about 5.5 clock cycles. That is well within the margin of most external memory controllers, but if your design uses a faster clock or back-to-back reads, you need to check the controller's wait-state configuration. The 60 ns word/page write cycle time is the spec for programming — it governs firmware update throughput, not read performance.
1.65 V supply — direct connect to 1.8 V logic
That saves two or three octals on the BOM and simplifies the PCB routing.
Industrial temperature range — where it fits
It is not specified for under-hood or engine-bay environments where junction temperatures exceed 105°C. If your application sees sustained temperatures above 85°C ambient, look at the GL-T or HyperFlash families that carry extended temp ratings.
Package and footprint — 64-ball FBGA
The tray shipping medium means the parts arrive in antistatic trays, not tape-and-reel — factor that into your pick-and-place feeder setup if you are using reel-fed assembly.