18 Mbit NoBL synchronous SRAM — 200 MHz, 3 ns access
It operates at a 200 MHz clock frequency with a 3 ns access time, using a single-data-rate (SDR) parallel interface. The part comes in a 100-pin TQFP (14x20 mm) package for surface-mount assembly.
Infineon lists the CY7C1370D-200AXCT as obsolete.
200 MHz clock, 3 ns access — timing margin for high-throughput buses
The 200 MHz clock rate and 3 ns access time define this SRAM's performance tier. At 200 MHz the cycle time is 5 ns, so a 3 ns access leaves 2 ns for address-to-data turnaround — enough margin for most synchronous buses running at this speed, but tight for back-to-back reads without pipeline stages. The 36-bit wide word suits applications that need a wide data path, such as network switches, base stations, or DSP buffers, where a single chip handles a full cache line or packet word.
100-pin TQFP — layout and footprint
The 100-pin TQFP (14x20 mm) is a standard fine-pitch package for synchronous SRAMs of this density. The 0.5 mm pitch requires careful routing of the 36 data lines plus address and control signals. Decoupling should follow the manufacturer's recommendation for the 3.3 V rail — typically one 0.1 µF per supply pin pair and a bulk capacitor near the package.