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AS7C251MNTF18A-10TQC

更新时间： 2024-11-23 23:00:31

品牌	Logo	应用领域
ALSC		静态存储器
页数	文件大小	规格书
18页	433K
描述
2.5V 1M x 18 Flowthrough Synchronous SRAM with NTD

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December 2004

AS7C251MNTF18A

2.5V 1M x 18 Flowthrough Synchronous SRAM with NTD^TM

Features

• Individual byte write and global write

• Clock enable for operation hold

• Multiple chip enables for easy expansion

• 2.5V core power supply

• Self-timed write cycles

• Interleaved or linear burst modes

• Snooze mode for standby operation

• Organization: 1,048,576 words × 18 bits

™

• NTD architecture for efficient bus operation

• Fast clock to data access: 7.5/8.5/10 ns

• Fast OE access time: 3.5/4.0 ns

• Fully synchronous operation

• Flow-through mode

• Asynchronous output enable control

• Available in 100-pin TQFP package

Logic block diagram

A[19:0]

Address

burst logic

CLK

CE0

CE1

CE2

Write delay

addr. registers

CLK

R/W

BWa

BWb

Control

logic

CLK

ADV / LD

1M x 18

LBO

SRAM

array

CLK

DQ [a,b]

Data

input

CLK

CEN

Output

buffer

DQ [a,b]

Selection guide

-75

-85

-10

Units

Minimum cycle time

8.5

7.5

275

Maximum clock access time

Maximum operating current

Maximum standby current

8.5

250

230

Maximum CMOS standby current (DC)

12/23/04, v 1.1

Alliance Semiconductor

P. 1 of 18

12 3 4 5 6 7...18

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