What this 512Kbit asynchronous SRAM brings to the bus
The Infineon CY7C1020DV33-10ZSXIT is a 512Kbit asynchronous SRAM organized as 32K x 16 bits, accessed through a parallel interface. Its 10 ns access time means a read or write cycle completes in one 100 MHz clock edge — no wait states for a 66 MHz bus, and only one wait for a 100 MHz bus. The 44-TSOP II package (0.400-inch body width, 10.16 mm) is a common footprint for 512Kbit parallel SRAMs, so board layout reuse across density upgrades is straightforward. The Tape & Reel shipping form is the standard for automated pick-and-place assembly lines.
10 ns access time — timing margin for the cache or buffer
For a DSP or MCU with a 66 MHz external bus, the 15 ns cycle budget leaves 5 ns of margin for PCB trace delay and clock skew — enough to avoid hold-time violations on a typical 2-layer board. If the bus runs at 100 MHz, the margin shrinks to zero, so the layout needs controlled impedance and matched trace lengths to keep setup times clean.
The base product number CY7C1020 covers multiple speed and temperature grades, so if a future spin needs a faster access time or a wider temperature range, the footprint stays the same.
Sourcing this part for a production line
If a design needs a wider temperature range or a different package, the CY7C1020 family has variants worth checking against the datasheet.