Note: The manufacturer provides a single datasheet file (CY7C1668KV18-CypressSemiconductor.pdf) that lists specifications for multiple related part numbers.
CY7C1668KV18 CY7C1670KV18
144-Mbit DDR II+ SRAM Two-Word Burst Architecture (2.5 Cycle Read Latency)
144-Mbit DDR II+ SRAM Two-Word Burst Architecture (2.5 Cycle Read Latency)
Features
■ 144-Mbit density (8 M × 18, 4 M × 36) ■ 550-MHz clock for high bandwidth ■ Two-word burst for reducing address bus frequency ■ Double data rate (DDR) interfaces (data transferred at
1100 MHz) at 550 MHz ■ Available in 2.5-clock cycle latency ■ Two input clocks (K and K) for precise DDR timing
❐ SRAM uses rising edges only ■ Echo clocks (CQ and CQ) simplify data capture in high-speed
systems ■ Data valid pin (QVLD) to indicate valid data on the output ■ Synchronous internally self-timed writes ■ DDR II+ operates with 2.