Datasheet > 存储 > 其他内存集成电路> MSM518221-40ZS

MSM518221-40ZS

更新时间： 2024-09-25 22:35:19

品牌	Logo	应用领域
冲电气 - OKI		存储内存集成电路
页数	文件大小	规格书
16页	182K
描述
262,214-Word x 8-Bit Field Memory

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MSM518221-40ZS 技术参数

生命周期：	Transferred	零件包装代码：	ZIP
包装说明：	ZIP,	针数：	28
Reach Compliance Code：	unknown	HTS代码：	8542.32.00.71
风险等级：	5.22	Is Samacsys：	N
其他特性：	INTERNAL 512 ROWS X 512 COLUMN X 8 BITS; SELF REFRESH	JESD-30 代码：	R-PZIP-T28
长度：	36 mm	内存密度：	2097152 bit
内存集成电路类型：	MEMORY CIRCUIT	内存宽度：	8
功能数量：	1	端子数量：	28
字数：	262144 words	字数代码：	256000
工作模式：	SYNCHRONOUS	最高工作温度：	70 °C
最低工作温度：		组织：	256KX8
输出特性：	3-STATE	封装主体材料：	PLASTIC/EPOXY
封装代码：	ZIP	封装形状：	RECTANGULAR
封装形式：	IN-LINE	认证状态：	Not Qualified
座面最大高度：	10.16 mm	最大供电电压 (Vsup)：	5.5 V
最小供电电压 (Vsup)：	4.5 V	标称供电电压 (Vsup)：	5 V
表面贴装：	NO	技术：	CMOS
温度等级：	COMMERCIAL	端子形式：	THROUGH-HOLE
端子节距：	1.27 mm	端子位置：	ZIG-ZAG
宽度：	2.8 mm	Base Number Matches：	1

MSM518221-40ZS 数据手册

E2L0032-17-Y1

This version: Jan. 1998

Previous version: Dec. 1996

¡ Semiconductor

MSM518221

¡ Semiconductor

MSM518221

262,214-Word ¥ 8-Bit Field Memory

DESCRIPTION

The OKI MSM518221 is a high performance 2-Mbit, 256K ¥ 8-bit, Field Memory. It is designed for

high-speedserialaccessapplicationssuchasHDTVs,conventionalNTSCTVs,VTRs,digitalmovies

and Multi-media systems. The 2-Mbit capacity fits one field of a conventional NTSC TV screen.

Each of the 8-bit planes has separate serial write and read ports. These employ independent control

clockstosupportasynchronousreadandwriteoperations. Differentclockratesarealsosupported,

which allow alternate data rates between write and read data streams.

TheMSM518221provideshighspeedFIFO,First-InFirst-Out,operationwithoutexternalrefreshing:

it refreshes its DRAM storage cells automatically, so that it appears fully static to the users.

Moreover, fully static type memory cells and decoders for serial access enable the refresh free serial

access operation, so that serial read and/or write control clock can be halted high or low for any

durationaslongasthepowerison. Internalconflictsofmemoryaccessandrefreshingoperations

are prevented by special arbitration logic.

The MSM518221's function is simple, and similar to a digital delay device whose delay-bit-length is

easily set by reset timing. The delay length, and the number of read delay clocks between write and

read, is determined by externally controlled write and read reset timings.

AdditionalSRAMserialregisters, orlinebuffersfortheinitialaccessof256¥8-bitenablehighspeed

first-bit-access with no clock delay just after the write or read reset timings.

TheMSM518221issimilarinoperationandfunctionalitytoOKI1-MbitFieldMemoryMSM514221B.

Ithasawritemaskfunctionorinputenablefunction(IE), andread-dataskippingfunctionoroutput

enablefunction(OE). Thedifferencesbetweenwriteenable(WE)andinputenable(IE),andbetween

read enable (RE) and output enable (OE) are that WE and RE can stop serial write/read address

increments, butIEandOEcannotstoptheincrement, whenwrite/readclockingiscontinuously

appliedtoMSM518221.Theinputenable(IE)functionallowstheusertowriteintoselectedlocations

of the memory only, leaving the rest of the memory contents unchanged. This facilitates data

processing to display a "picture in picture" on a TV screen.

1/16

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与MSM518221-40ZS相关器件

型号	品牌	获取价格	描述	数据表
MSM518221A	OKI	获取价格	262,214-Word x 8-Bit Field Memory
MSM518221A-25JS	OKI	获取价格	262,214-Word x 8-Bit Field Memory
MSM518221A-25ZS	OKI	获取价格	262,214-Word x 8-Bit Field Memory
MSM518221A-30GS-K	OKI	获取价格	262,214-Word x 8-Bit Field Memory
MSM518221A-30JS	OKI	获取价格	262,214-Word x 8-Bit Field Memory
MSM518221A-30ZS	OKI	获取价格	262,214-Word x 8-Bit Field Memory
MSM518221A-40GS-K	OKI	获取价格	262,214-Word x 8-Bit Field Memory
MSM518221A-40JS	OKI	获取价格	262,214-Word x 8-Bit Field Memory
MSM518221A-40ZS	OKI	获取价格	262,214-Word x 8-Bit Field Memory
MSM518222	OKI	获取价格	262,214-Word x 8-Bit Field Memory

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