CY7C1316JV18, CY7C1916JV18 CY7C1318JV18, CY7C1320JV18

18-Mbit DDR-II SRAM 2-Word Burst Architecture

Features

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

300 MHz clock for high bandwidth

2-word burst for reducing address bus frequency

Double Data Rate (DDR) interfaces

(data transferred at 600 MHz) at 300 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 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

Functional Description

The CY7C1316JV18, CY7C1916JV18, CY7C1318JV18, and CY7C1320JV18 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. Write data is registered on the rising edges of both K and K. Read data is driven on the rising edges of C and C if provided, or on the rising edge of K and K if C/C are not provided. Each address location is associated with two 8-bit words in the case of CY7C1316JV18 and two 9-bit words in the case of CY7C1916JV18 that burst sequentially into or out of the device. The burst counter always starts with a ‘0’ internally in the case of CY7C1316JV18 and CY7C1916JV18. For CY7C1318JV18 and CY7C1320JV18, the burst counter takes in the least significant bit of the external address and bursts two 18-bit words (in the case of CY7C1318JV18) of two 36-bit words (in the case of CY7C1320JV18) sequentially into or out of the device.

Asynchronous inputs include an output impedance matching input (ZQ). Synchronous data outputs (Q, sharing the same physical pins as the data inputs, D) are tightly matched to the two output echo clocks CQ/CQ, eliminating the need to capture data separately from each individual DDR SRAM in the system design. Output data clocks (C/C) enable maximum system clocking and data synchronization flexibility.

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.

Configurations

CY7C1316JV18 – 2M x 8

CY7C1916JV18 – 2M x 9

CY7C1318JV18 – 1M x 18

CY7C1320JV18 – 512K x 36

Selection Guide

 

Description

300 MHz

Unit

Maximum Operating Frequency

 

 

300

MHz

 

 

 

 

 

Maximum Operating Current

 

x8

610

mA

 

 

 

 

 

 

 

x9

615

 

 

 

 

 

 

 

 

x18

655

 

 

 

 

 

 

 

 

x36

730

 

 

 

 

 

 

Cypress Semiconductor Corporation • 198 Champion Court

San Jose, CA 95134-1709

408-943-2600

Document Number: 001-15271 Rev. *B

 

Revised March 10, 2008

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Cypress CY7C1320JV18, CY7C1316JV18, CY7C1318JV18 manual Features, Functional Description, Configurations, Selection Guide