Datasheet > CY7C1425KV18_13

CY7C1425KV18_13

更新时间： 2024-11-27 12:27:51

品牌	Logo	应用领域
赛普拉斯 - CYPRESS		静态存储器
页数	文件大小	规格书
33页	895K
描述
36-Mbit QDRÂ® II SRAM Two-Word Burst Architecture

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CY7C1425KV18_13 数据手册

CY7C1425KV18

CY7C1412KV18

CY7C1414KV18

36-Mbit QDR^®II SRAM Two-Word

Burst Architecture

36-Mbit QDR^®II SRAM Two-Word Burst Architecture

Features

Configurations

■ Separate independent read and write data ports

❐ Supports concurrent transactions

CY7C1425KV18 – 4 M × 9

CY7C1412KV18 – 2 M × 18

CY7C1414KV18 – 1 M × 36

■ 333 MHz clock for high bandwidth

■ Two-word burst on all accesses

Functional Description

■ Double data rate (DDR) Interfaces on both read and write ports

(data transferred at 666 MHz) at 333 MHz

The CY7C1425KV18, CY7C1412KV18, and CY7C1414KV18

are 1.8 V synchronous pipelined SRAMs, equipped with QDR II

architecture. QDR II architecture consists of two separate ports:

the read port and the write port to access the memory array. The

read port has dedicated data outputs to support read operations

and the write port has dedicated data inputs to support write

operations. QDR II architecture has separate data inputs and

data outputs to completely eliminate the need to “turnaround” the

data bus that exists with common I/O devices. Access to each

port is through a common address bus. Addresses for read and

write addresses are latched on alternate rising edges of the input

(K) clock. Accesses to the QDR II read and write ports are

completely independent of one another. To maximize data

throughput, both read and write ports are equipped with DDR

interfaces. Each address location is associated with two 9-bit

words (CY7C1425KV18), 18-bit words (CY7C1412KV18), or

36-bit words (CY7C1414KV18) that burst sequentially into or out

of the device. Because data can be transferred into and out of

the device on every rising edge of both input clocks (K and K and

C and C), memory bandwidth is maximized while simplifying

system design by eliminating bus turnarounds.

■ 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

■ Single multiplexed address input bus latches address inputs

for both read and write ports

■ Separate port selects for depth expansion

■ Synchronous internally self-timed writes

■ QDR^®II operates with 1.5 cycle read latency when DOFF is

asserted HIGH

■ OperatessimilartoQDRIdevicewith1cyclereadlatencywhen

DOFF is asserted LOW

■ Available in × 9, × 18, and × 36 configurations

■ Full data coherency, providing most current data

Depth expansion is accomplished with port selects, which

enables each port to operate independently.

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.

■ Core V_DD= 1.8 V (±0.1 V); I/O V_DDQ= 1.4 V to V_DD

❐ Supports both 1.5 V and 1.8 V I/O supply

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

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

■ Variable drive HSTL output buffers

■ JTAG 1149.1 compatible test access port

■ Phase locked loop (PLL) for accurate data placement

Selection Guide

Description

Maximum operating frequency

333 MHz

333

300 MHz

300

250 MHz Unit

250

590

610

730

MHz

Maximum operating current

× 9

730

680

× 18

× 36

750

700

910

850

Cypress Semiconductor Corporation

Document Number: 001-57825 Rev. *I

•

198 Champion Court

•

San Jose, CA 95134-1709

•

408-943-2600

Revised March 20, 2013

12 3 4 5 6 7...33

中文翻译

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与CY7C1425KV18_13相关器件

型号	品牌	获取价格	描述	数据表
CY7C1425KV18-250BZC	CYPRESS	获取价格	36-Mbit QDR? II SRAM 2-Word Burst Architecture
CY7C1425KV18-250BZC	INFINEON	获取价格	Synchronous SRAM
CY7C1425KV18-250BZCT	INFINEON	获取价格	Synchronous SRAM
CY7C1425KV18-250BZI	CYPRESS	获取价格	36-Mbit QDRÂ® II SRAM Two-Word Burst Architec
CY7C1425KV18-250BZXC	CYPRESS	获取价格	36-Mbit QDRÂ® II SRAM Two-Word Burst Architec
CY7C1425KV18-250BZXI	CYPRESS	获取价格	36-Mbit QDRÂ® II SRAM Two-Word Burst Architec
CY7C1425KV18-300BZC	CYPRESS	获取价格	36-Mbit QDRÂ® II SRAM Two-Word Burst Architec
CY7C1425KV18-300BZXC	CYPRESS	获取价格	36-Mbit QDRÂ® II SRAM Two-Word Burst Architec
CY7C1425KV18-300BZXC	INFINEON	获取价格	Synchronous SRAM
CY7C1425KV18-333BZC	CYPRESS	获取价格	36-Mbit QDR? II SRAM 2-Word Burst Architecture

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