72 Mbit QDR II SRAM at 200 MHz — buffer memory for high-throughput systems
The Cypress CY7C1512V18-200BZXI is a 72 Mbit QDR II synchronous SRAM organized as 4M x 18 bits, clocked at 200 MHz for a peak data rate that suits network processor look-aside buffers, traffic manager packet memory, and high-end test equipment. The QDR II architecture delivers separate read and write data ports, eliminating bus-turnaround dead cycles that cut throughput in conventional shared-bus SRAM.
Cypress has ended production; no factory orders are accepted. Independent distributors with verified stock can quote against an RFQ, but availability is finite and prices reflect scarcity.
165-ball FBGA — layout and assembly notes
The 165-ball FBGA measures 15x17 mm with a 1.0 mm ball pitch typical of Cypress high-density SRAM packages. Surface-mount assembly with a standard lead-free profile works, but the BGA's hidden solder joints mean post-reflow X-ray inspection is the norm for verifying voiding and wetting. The package is MSL 3 — if the moisture barrier bag has been open longer than the floor-life window, a bake at 125°C for 48 hours is needed before reflow to prevent popcorning. Decoupling should use four 0.1 µF capacitors placed as close as possible to the BGA's power balls, plus a 10 µF bulk cap per supply rail within 10 mm of the package perimeter.