SRAM Chip Sync Dual 1.8V 36M-Bit 4M x 9-Bit 0.45ns 165-Pin FBGA

The CY7C1425JV18 is 1.8V Synchronous Pipelined SRAMs, equipped with QDR-II architecture. QDR-II architecture consists of two separate ports: the read port and the write port to access the memory array. The read port has data outputs to support read operations and the write port has data inputs to support write operations. QDR-II architecture has separate data inputs and data outputs to completely eliminate the need to “turn-around” the data bus required with common IO devices. Access to each port is accomplished through a common address bus. The read address is latched on the rising edge of the K clock and the write address is latched on the rising edge of the K clock. Accesses to the QDR-II read and write ports are completely independent of one another. To maximize data throughput, both read and write ports are provided with DDR interfaces. Each address location is associated with 9-bit words (CY7C1425JV18) that burst sequentially into or out of the device. Because data can be transferred into and out of the device on every rising edge of both input clocks (K and K and C and C), memory bandwidth is maximized while simplifying system design by eliminating bus “turn-arounds”. Depth expansion is accomplished with port selects, which enables each port to operate independently. All synchronous inputs pass through input registers controlled by the K or K input clocks. All data outputs pass through output registers controlled by the C or C (or K or K in a single clock domain) input clocks. Writes are conducted with on-chip synchronous self-timed write circuitry.

• Separate independent read and write data ports
  • Supports concurrent transactions
• 267 MHz clock for high bandwidth
• 2-word burst on all accesses
• Double Data Rate (DDR) interfaces on both read and write ports (data transferred at 534 MHz) at 267 MHz
• Two input clocks (K and K) for precise DDR timing
  • SRAM uses rising edges only
• Two input clocks for output data (C and C) to minimize clock skew and flight time mismatches
• Echo clocks (CQ and CQ) simplify data capture in high-speed systems
• Single multiplexed address input bus latches address inputs for both read and write ports
• Separate port selects for depth expansion
• Synchronous internally self-timed writes
• QDR™-II operates with 1.5 cycle read latency when Delay Lock Loop (DLL) is enabled
• Operates like a QDR-I device with 1 cycle read latency in DLL off mode
• Available in x8, x9, x18, and x36 configurations
• Full data coherency, providing most current data
• Core VDD = 1.8V (±0.1V); IO VDDQ = 1.4V to VDD
• Available in 165-Ball FBGA package (15 x 17 x 1.4 mm)
• Offered in both Pb-free and non Pb-free packages
• Variable drive HSTL output buffers
• JTAG 1149.1 compatible test access port
• Delay Lock Loop (DLL) for accurate data placement