72-Mbit DDR II+ SRAM Two-Word Burst Architecture
CY7C1548KV18/CY7C1550KV18
72-Mbit DDR II+ SRAM Two-Word Burst Architecture (2.0 Cycle Read Latency)
72-Mbit DDR II+ SRA...
Description
CY7C1548KV18/CY7C1550KV18
72-Mbit DDR II+ SRAM Two-Word Burst Architecture (2.0 Cycle Read Latency)
72-Mbit DDR II+ SRAM Two-Word Burst Architecture (2.0 Cycle Read Latency)
Features
■ 72-Mbit density (4M × 18, 2M × 36) ■ 450-MHz clock for high bandwidth ■ 2-word burst for reducing address bus frequency ■ Double data rate (DDR) interfaces (data transferred at
900 MHz) at 450 MHz ■ Available in 2.0 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 2.0 cycle read latency when DOFF is
asserted HIGH ■ Operates similar to DDR I device with 1 cycle read latency when
DOFF is asserted LOW ■ Core VDD = 1.8 V ± 0.1 V; I/O VDDQ = 1.4 V to VDD[1]
❐ Supports both 1.5 V and 1.8 V I/O supply ■ High-speed transceiver logic...
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