Datasheet > MSM548263

MSM548263

更新时间： 2022-12-13 04:56:09

品牌	Logo	应用领域
冲电气 - OKI		动态存储器
页数	文件大小	规格书
40页	387K
描述
262,144-Word x 8-Bit Multiport DRAM

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数据手册

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MSM548263 数据手册

E2L0017-17-Y1

This version: Jan. 1998

Previous version: Dec. 1996

¡ Semiconductor

MSM548263

¡ Semiconductor

MSM548263

262,144-Word ¥ 8-Bit Multiport DRAM

DESCRIPTION

The MSM548263 is a 2-Mbit CMOS multiport DRAM composed of a 262,144-word by 8-bit

dynamic RAM, and a 512-word by 8-bit SAM. Its RAM and SAM operate independently and

asynchronously.

It supports three types of operations: random access to RAM port, high speed serial access to

SAM port, and bidirectional transfer of data between any selected row in the RAM port and the

SAM port. In addition to the conventional multiport DRAM operating modes, the MSM548263

features block write, flash write functions and extended page mode on the RAM port and a split

datatransfercapability, programmablestopsontheSAMport. TheSAMportrequiresnorefresh

operation because it uses static CMOS flip-flops.

FEATURES

• Single power supply: 5 V ±10%

• Full TTL compatibility

• Multiport organization

RAM : 256K word ¥ 8 bits

SAM : 512 word ¥ 8 bits

• Extended page mode

• Write per bit

• Persistent write per bit

• Masked flash write

• Masked block write

• RAS only refresh

• CAS before RAS refresh

• Hidden refresh

• Serial read/write

• 512 tap location

• Programmable stops

• Bidirectional data transfer

• Split transfer

• Masked write transfer

• Refresh: 512 cycles/8 ms

• Package options:

40-pin 400 mil plastic SOJ

(SOJ40-P-400-1.27)

(Product : MSM548263-xxJS)

44/40-pin 400 mil plastic TSOP (Type II)(TSOPII44/40-P-400-0.80-K)(Product : MSM548263-xxTS-K)

xx indicates speed rank.

PRODUCT FAMILY

Access Time

Cycle Time

RAM SAM

Power Dissipation

Family

MSM548263-60

RAM

60 ns

70 ns

80 ns

SAM

Operating

Standby

8 mA

17 ns 120 ns 22 ns

17 ns 140 ns 22 ns

20 ns 150 ns 25 ns

140 mA

130 mA

120 mA

MSM548263-70

MSM548263-80

8 mA

1/40

12 3 4 5 6 7...40

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与MSM548263相关器件

型号	品牌	描述	获取价格	数据表
MSM548263-60JS	OKI	Video DRAM, 256KX8, 60ns, CMOS, PDSO40, 0.400 INCH, 1.27 MM PITCH, PLASTIC, SOJ-40	获取价格
MSM548263-60TS-K	OKI	Video DRAM, 256KX8, 60ns, CMOS, PDSO40, 0.400 INCH, 0.80 MM PITCH, PLASTIC, TSOP2-44/40	获取价格
MSM548263-70JS	OKI	Video DRAM, 256KX8, 70ns, CMOS, PDSO40, 0.400 INCH, 1.27 MM PITCH, PLASTIC, SOJ-40	获取价格
MSM548263-70TS-K	OKI	Video DRAM, 256KX8, 70ns, CMOS, PDSO40, 0.400 INCH, 0.80 MM PITCH, PLASTIC, TSOP2-44/40	获取价格
MSM548263-80TS-K	OKI	Video DRAM, 256KX8, 80ns, CMOS, PDSO40, 0.400 INCH, 0.80 MM PITCH, PLASTIC, TSOP2-44/40	获取价格
MSM548331	OKI	222,720-Word x 12-Bit Field Memory	获取价格