20 ns access, 5V parallel SRAM
The CY7C199CN-20ZXIT: 256Kbit asynchronous SRAM organized as 32K x 8 with a 20 ns access time — the bus timing margin for a 5V parallel interface. The write cycle time matches at 20 ns for word and page writes. The industrial temperature range (-40°C to 85°C) suits outdoor or engine-bay deployment where ambient swings are wide.
28-TSSOP — hand-solderable but fine-pitch
The supplier device package is 28-TSOP I — the same footprint, different naming convention. Supplied in Tape & Reel (TR) — the reel quantity is not stated, but the TR suffix in the order code confirms reel packaging for automated pick-and-place.