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Functional Description

The CY7C1316CV18, CY7C1916CV18, CY7C1318CV18, and CY7C1320CV18 are 1.8V Synchronous Pipelined SRAMs equipped with DDR-II architecture. The DDR-II consists of an SRAM core with advanced synchronous peripheral circuitry and a one-bit burst counter. Addresses for read and write are latched on alternate rising edges of the input (K) clock.

Features

■18-Mbit density (2M x 8, 2M x 9, 1M x 18, 512K x 36)

■267 MHz clock for high bandwidth

■2-word burst for reducing address bus frequency

■Double Data Rate (DDR) interfaces (data transferred at 534 MHz) at 267 MHz

■Synchronous internally self-timed writes

■DDR-II operates with 1.5 cycle read latency when the DLL is enabled

■Operates similar to a DDR-I device with 1 cycle read latency in DLL off mode

■1.8V core power supply with HSTL inputs and outputs

■Variable drive HSTL output buffers

■Expanded HSTL output voltage (1.4V–VDD)

■Available in 165-Ball FBGA package (13 x 15 x 1.4 mm)

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

■JTAG 1149.1 compatible test access port

■Delay Lock Loop (DLL) for accurate data placement