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參數(shù)資料
| 型號： | MSM548262-70JS |
| 廠商： | OKI SEMICONDUCTOR CO., LTD. |
| 英文描述： | 262,144-Word x 8-Bit Multiport DRAM |
| 中文描述： | 262,144字× 8位多端口內(nèi)存 |
| 文件頁數(shù)： | 1/37頁 |
| 文件大小： | 464K |
| 代理商： | MSM548262-70JS |
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Semiconductor
MSM548262
1/37
262,144-Word
￥
8-Bit Multiport DRAM
DESCRIPTION
The MSM548262 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 MSM548262
features block write, flash write functions on the RAM port and a split data transfer capability
on the SAM port. The SAM port requires no refresh 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
Fast page mode
Write per bit
Masked flash write
Masked block write
Package options:
40-pin 400 mil plastic SOJ
44/40-pin 400 mil plastic TSOP (Type II)(TSOPII44/40-P-400-0.80-K)
(Product : MSM548262-xxTS-K)
(SOJ40-P-400-1.27)
(Product : MSM548262-xxJS)
xx indicates speed rank.
PRODUCT FAMILY
RAS
only refresh
CAS
before
RAS
refresh
Hidden refresh
Serial read/write
512 tap location
Bidirectional data transfer
Split transfer
Masked write transfer
Refresh: 512 cycles/8 ms
Access Time
RAM
60 ns
70 ns
80 ns
Cycle Time
RAM
120 ns
140 ns
150 ns
Power Dissipation
Operating
140 mA
130 mA
120 mA
Standby
8 mA
8 mA
8 mA
SAM
17 ns
17 ns
20 ns
SAM
22 ns
22 ns
25 ns
Family
MSM548262-60
MSM548262-70
MSM548262-80
E2L0016-17-Y1
This version: Jan. 1998
Previous version: Dec. 1996
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MSM548262-70TS-K | 262,144-Word x 8-Bit Multiport DRAM |
| MSM548262-80JS | 262,144-Word x 8-Bit Multiport DRAM |
| MSM548262-80TS-K | 262,144-Word x 8-Bit Multiport DRAM |
| MSM548262 | 262,144-Word ×8-Bit Multiport DRAM(256k字×8位多端口動態(tài)RAM) |
| MSM548263 | 262,144-Word ×8-Bit Multiport DRAM(256k字×8位多端口動態(tài)RAM) |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MSM548262-JS70 | 制造商:ROHM Semiconductor 功能描述: |
| MSM548263-60JS | 制造商:ROHM Semiconductor 功能描述: |
| MSM548263-60TS-K | 制造商:OK International 功能描述: |
| MSM54V12222A-30TS-K | 制造商:OKI Semiconductor 功能描述:FIELD/FRAME/LINE MEMORY, 44 Pin, Plastic, TSOP |
| MSM54V12222B-25JDR17 | 制造商:ROHM Semiconductor 功能描述: |
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