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MC-458CB646 PDF预览

MC-458CB646

更新时间: 2024-11-03 22:24:27
品牌 Logo 应用领域
日电电子 - NEC /
页数 文件大小 规格书
16页 199K
描述
8M-WORD BY 64-BIT SYNCHRONOUS DYNAMIC RAM MODULE UNBUFFERED TYPE

MC-458CB646 数据手册

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DATA SHEET  
MOS INTEGRATED CIRCUIT  
MC-458CB646  
8M-WORD BY 64-BIT SYNCHRONOUS DYNAMIC RAM MODULE  
UNBUFFERED TYPE  
Description  
The MC-458CB646EFB and MC-458CB646PFB are 8,388,608 words by 64 bits synchronous dynamic RAM module  
on which 4 pieces of 128M SDRAM: µPD45128163 are assembled.  
This module provides high density and large quantities of memory in a small space without utilizing the surface-  
mounting technology on the printed circuit board.  
Decoupling capacitors are mounted on power supply line for noise reduction.  
Features  
8,388,608 words by 64 bits organization  
Clock frequency and access time from CLK  
Part number  
MC-458CB646EFB-A80  
MC-458CB646EFB-A10  
/CAS latency  
Clock frequency  
(MAX.)  
Access time from CLK  
(MAX.)  
6 ns  
6 ns  
6 ns  
7 ns  
6 ns  
6 ns  
6 ns  
7 ns  
CL = 3  
CL = 2  
CL = 3  
CL = 2  
CL = 3  
CL = 2  
CL = 3  
CL = 2  
125 MHz  
100 MHz  
100 MHz  
77 MHz  
125 MHz  
100 MHz  
100 MHz  
77 MHz  
MC-458CB646PFB-A80  
MC-458CB646PFB-A10  
Fully Synchronous Dynamic RAM, with all signals referenced to a positive clock edge  
Pulsed interface  
Possible to assert random column address in every cycle  
Quad internal banks controlled by BA0 and BA1 (Bank Select)  
Programmable burst-length (1, 2, 4, 8 and full page)  
Programmable wrap sequence (sequential / interleave)  
Programmable /CAS latency (2, 3)  
Automatic precharge and controlled precharge  
CBR (Auto) refresh and self refresh  
All DQs have 10 Ω ± 10 % of series resistor  
Single 3.3 V ± 0.3 V power supply  
LVTTL compatible  
4,096 refresh cycles/64 ms  
Burst termination by Burst Stop command and Precharge command  
168-pin dual in-line memory module (Pin pitch = 1.27 mm)  
Unbuffered type  
Serial PD  
The information in this document is subject to change without notice. Before using this document, please  
confirm that this is the latest version.  
Not all devices/types available in every country. Please check with local NEC representative for  
availability and additional information.  
Document No. M13049EJ7V0DS00 (7th edition)  
Date Published January 2000 NS CP(K)  
Printed in Japan  
The mark shows major revised points.  
1997  
©

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