QDR II (Quad Data Rate) delivers two independent read and two independent write ports on a single clock, effectively quadrupling the data bandwidth of a traditional synchronous SRAM at the same clock frequency. This part is designed for high-throughput buffer and cache applications in networking switches, routers, telecom line cards, and test equipment where back-to-back read/write transactions with zero dead cycles are required.
The 167 MHz clock rate yields a peak data rate of 167 million 36-bit words per second per port. For a 512K x 36 configuration, that translates to roughly 6 Gbps of aggregate bandwidth across the two read and two write ports. This speed bin sits below the 200 MHz variant (CY7C1315BV18-200BZC), which offers about 20% higher throughput but draws slightly more active current. If your timing budget has margin at 167 MHz, this part saves a few hundred milliwatts versus the faster bin.
165-ball FBGA — footprint and assembly realities
It is not hand-solderable with a standard iron.
Obsolete — sourcing strategy for this part
The CY7C1315BV18-167BZC is officially classified as Obsolete by Cypress (now Infineon). No direct pin-compatible replacement has been announced in the QDR II family.