Datasheet > MSM51V8222A-40JS

MSM51V8222A-40JS

更新时间： 2024-11-27 06:14:23

品牌	Logo	应用领域
冲电气 - OKI		光电二极管
页数	文件大小	规格书
17页	200K
描述
Memory Circuit, 256KX8, CMOS, PDSO28, 0.400 INCH, 1.27 MM PITCH, PLASTIC, SOJ-28

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MSM51V8222A-40JS 数据手册

E2L0055-28-Z2

This version: Dec. 1998

Previous version: Mar. 1998

¡ Semiconductor

MSM51V8222A

¡ Semiconductor

MSM51V8222A

262,214-Word ¥ 8-Bit Field Memory

DESCRIPTION

The OKI MSM51V8222A is a high performance 2-Mbit, 256K ¥ 8-bit, Field Memory. It is designed

for high-speed serial access applications such as HDTVs, conventional NTSC TVs, VTRs, digital

movies and Multi-media systems. It is a FRAM for wide or low end use as general commodity

TVs and VTRs, exclusively. The MSM51V8222A is not designed for the other use or high end

use in medical systems, professional graphics systems which require long term picture, and

data storage systems and others. The 2-Mbit capacity fits one field of a conventional NTSC TV

screen. TwocascadedMSM51V8222Asmakeoneframeofthescreen:twoormoreMSM51V8222As

can be cascaded directly without any delay devices between them. (Cascading provides larger

storage depth or a longer delay).

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.

The MSM51V8222A provides high speed FIFO, First-In First-Out, operation without external

refreshing: 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

duration as long as the power is on. Internal conflicts of memory access and refreshing operations

are prevented by special arbitration logic.

TheMSM51V8222A'sfunctionissimple,andsimilartoadigitaldelaydevicewhosedelay-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.

The MSM51V8222A is similar in operation and functionality to OKI 1-Mbit Field Memory

MSM51V4221C, with the addition of cascade capability. (As for MSM51V4221C operation

compatible 2-Mbit Field Memory, OKI has the MSM51V8221A which is a sister device of

MSM51V8222A).

Additionally, the MSM51V8222A has a write mask function or input enable function (IE), and read-

data skipping function or output enable function (OE). The differences between write enable (WE)

andinputenable(IE), andbetweenreadenable(RE)andoutputenable(OE)arethatWEandREcan

stop serial write/read address increments, but IE and OE cannot stop the increment, when write/

read clocking is continuously applied to MSM51V8222A. The input enable (IE) function allows the

user to write into selected locations 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

12 3 4 5 6 7...17

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与MSM51V8222A-40JS相关器件

型号	品牌	获取价格	描述	数据表
MSM51V8222A-40ZS	OKI	获取价格	Memory Circuit, 256KX8, CMOS, PZIP28, 0.400 INCH HEIGHT, 1.27 MM PITCH, PLASTIC, ZIP-28
MSM51X17400F	OKI	获取价格	4,194,304-Word 】 4-Bit DYNAMIC RAM : FAST PAG
MSM51X17400F-10	OKI	获取价格	4,194,304-Word 】 4-Bit DYNAMIC RAM : FAST PAG
MSM51X17400F-10TS-K	OKI	获取价格	4,194,304-Word 】 4-Bit DYNAMIC RAM : FAST PAG
MSM521001L-10RS	OKI	获取价格	Standard SRAM, 128KX8, 100ns, CMOS, PDIP32, 0.600 INCH, PLASTIC, DIP-32
MSM521001L-85RS	OKI	获取价格	Standard SRAM, 128KX8, 85ns, CMOS, PDIP32, 0.600 INCH, PLASTIC, DIP-32
MSM521008-17JS	OKI	获取价格	Standard SRAM, 128KX8, 17ns, CMOS, PDSO32, 0.400 INCH, 1.27 MM PITCH, PLASTIC, SOJ-32
MSM521008-20JS	OKI	获取价格	Standard SRAM, 128KX8, 20ns, CMOS, PDSO32, 0.400 INCH, 1.27 MM PITCH, PLASTIC, SOJ-32
MSM521008-25JS	OKI	获取价格	Standard SRAM, 128KX8, 25ns, CMOS, PDSO32, 0.400 INCH, 1.27 MM PITCH, PLASTIC, SOJ-32
MSM521208-20JS	OKI	获取价格	Standard SRAM, 128KX8, 20ns, CMOS, PDSO32, 0.400 INCH, 1.27 MM PITCH, PLASTIC, SOJ-32

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