Functional Description

The CY7C1416KV18, CY7C1427KV18, CY7C1418KV18, and CY7C1420KV18 are 1.8 V synchronous pipelined SRAM equipped with DDR II architecture. The DDR II consists of an SRAM core with advanced synchronous peripheral circuitry and a 1-bit burst counter.

Features

■ 36-Mbit density (4 M × 8, 4 M × 9, 2 M × 18, 1 M × 36)

■ 333 MHz clock for high bandwidth

■ 2-word burst for reducing address bus frequency

■ Double data rate (DDR) interfaces (data transferred at 666 MHz) at 333 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

■ Synchronous internally self-timed writes

■ DDR II operates with 1.5 cycle read latency when DOFF is asserted HIGH

■ Operates similar to DDR-I device with 1 cycle read latency when DOFF is asserted LOW

■ 1.8 V core power supply with HSTL inputs and outputs

■ Variable drive HSTL output buffers

■ Expanded HSTL output voltage (1.4 V to VDD)

❐ Supports both 1.5 V and 1.8 V IO supply

■ Available in 165-ball FBGA package (13 × 15 × 1.4 mm)

■ Offered in both Pb-free and non Pb-free packages

■ JTAG 1149.1 compatible test access port

■ Phase locked loop (PLL) for accurate data placement