QDR II+ architecture at 400 MHz — what the clock rate buys you
The CY7C1145KV18-400BZXCT: This is a QDR II+ (Quad Data Rate II+) synchronous SRAM, a class designed for the highest-throughput memory interfaces in networking, telecom, and test equipment. The 400 MHz clock drives a data rate of 800 MHz per pin on the read and write ports because QDR II+ transfers data on both clock edges. For a system architect, that translates to a peak read bandwidth of roughly 3.2 GB/s across the 36-bit word — enough to keep a 100 GbE packet processor fed without wait states.
18 Mbit density — 512K x 36 organization
The memory is organized as 512K words of 36 bits each, for a total of 18 Mbit. The 36-bit word width is common in applications that need a 32-bit data bus plus parity or ECC overhead without an extra chip. The 512K depth is modest by today's DRAM standards, but for an SRAM at this speed grade it is a typical density — the trade-off is access time vs capacity.
Supply and temperature — power domain and environment
The supply range is 1.7 V to 1.9 V, a narrow window that demands a clean, regulated rail — a 1.8 V LDO or switching regulator with tight load regulation is the typical choice. This limits deployment to indoor, controlled environments; it is not rated for industrial or automotive ambient extremes.
Package — 165-ball FBGA, 13x15 mm
Housed in a 165-ball LBGA, the supplier device package is a 165-FBGA measuring 13x15 mm. The fine-pitch BGA requires a multi-layer PCB with via-in-pad or microvia fan-out for the inner rows. The Tape & Reel packaging is the standard for automated assembly — the reel quantity is confirmed at quote time.