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AS7C251MNTD18A Datasheet

  • AS7C251MNTD18A

  • 2.5V 1M x 18 Pipelined SRAM with NTD

  • 18頁

  • ALSC

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December 2004
廬
AS7C251MNTD18A
2.5V 1M x 18 Pipelined SRAM with NTD
TM
Features
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Organization: 1,048,576 words 脳 18 bits
NTD
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architecture for efficient bus operation
Fast clock speeds to 166 MHz
Fast clock to data access: 3.5/3.8 ns
Fast OE access time: 3.5/3.8 ns
Fully synchronous operation
Asynchronous output enable control
Available in 100-pin TQFP package
Individual byte write and global write
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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
Logic block diagram
A[19:0]
20
D
Address
register
burst logic
Q
20
CLK
CE0
CE1
CE2
R/W
BWa
BWb
ADV / LD
LBO
ZZ
D
Q
20
Write delay
addr. registers
CLK
Control
logic
CLK
Write Buffer
CLK
1M x 18
SRAM
array
DQ [a,b]
18
D
Data
Q
input
register
CLK
18
18
18
18
CLK
CEN
CLK
OE
Output
register
18
OE
DQ [a,b]
Selection guide
-166
Minimum cycle time
Maximum clock frequency
Maximum clock access time
Maximum operating current
Maximum standby current
Maximum CMOS standby current (DC)
12/23/04, v.2.2
-133
7.5
133
3.8
270
75
40
Units
ns
MHz
ns
mA
mA
mA
P. 1 of 18
6
166
3.5
290
85
40
Alliance Semiconductor
Copyright 漏 Alliance Semiconductor. All rights reserved.

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