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參數(shù)資料
| 型號(hào)： | AS7C251MFT18A-85TQIN |
| 廠商： | ALLIANCE SEMICONDUCTOR CORP |
| 元件分類： | DRAM |
| 英文描述： | 2.5V 1M x 18 flowthrough burst synchronous SRAM |
| 中文描述： | 1M X 18 STANDARD SRAM, 8.5 ns, PQFP100 |
| 封裝： | 14 X 20 MM, LEAD FREE, TQFP-100 |
| 文件頁數(shù)： | 6/19頁 |
| 文件大?。?/td> | 511K |
| 代理商： | AS7C251MFT18A-85TQIN |
AS7C251MFT18A
12/24/04, v. 1.2
Alliance Semiconductor
6 of 19
Write enable truth table (per byte)
Key:
X = don’t care; L = low; H = high; B
WE
, B
Wn
= internal write signal
Asynchronous Truth Table
Notes:
1. X means “Don’t Care”
2. ZZ pin is pulled down internally
3. For write cycles that follows read cycles, the output buffers must be disabled with OE, otherwise data bus contention will occur.
4. Snooze mode means power down state of which stand-by current does not depend on cycle times
5. Deselected means power down state of which stand-by current depends on cycle times
Burst sequence table
Function
GWE
L
H
H
H
H
H
BWE
X
L
L
L
H
L
BWa
X
L
L
H
X
H
BWb
X
L
H
L
X
H
Write all bytes (a, b)
Write byte a
Write byte b
Read
Operation
ZZ
H
L
L
L
L
OE
X
L
H
X
X
I/O Status
High-Z
Dout
High-Z
Din, High-Z
High-Z
Snooze mode
Read
Write
Deselected
Interleaved burst address (LBO = 1)
A1 A0
0 0
2
nd
Address
0 1
3
rd
Address
1 0
4
th
Address
1 1
Linear burst address (LBO = 0)
A1 A0
0 0
0 1
1 0
1 1
A1 A0
0 1
0 0
1 1
1 0
A1 A0
1 0
1 1
0 0
0 1
A1 A0
1 1
1 0
0 1
0 0
A1 A0
0 1
1 0
1 1
1 0
A1 A0
1 0
1 1
0 0
0 1
A1 A0
1 1
0 0
0 1
1 0
1
st
Address
1
st
Address
2
nd
Address
3
rd
Address
4
th
Address
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| AS7C251MFT18A-10TQIN | 2.5V 1M x 18 flowthrough burst synchronous SRAM |
| AS7C251MFT18A-75TQC | High Speed CMOS Logic Triple 3-Input AND Gates 14-SOIC -55 to 125 |
| AS7C251MFT18A-75TQCN | 2.5V 1M x 18 flowthrough burst synchronous SRAM |
| AS7C251MFT18A-75TQI | High Speed CMOS Logic Triple 3-Input AND Gates 14-SOIC -55 to 125 |
| AS7C251MFT18A | 2.5V 1M x 18 flowthrough burst synchronous SRAM |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AS7C251MFT32A | 制造商:ALSC 制造商全稱:Alliance Semiconductor Corporation 功能描述:2.5V 1M x 32/36 Flow-through synchronous SRAM |
| AS7C251MFT32A-10TQC | 制造商:ALSC 制造商全稱:Alliance Semiconductor Corporation 功能描述:2.5V 1M x 32/36 Flow-through synchronous SRAM |
| AS7C251MFT32A-10TQCN | 制造商:ALSC 制造商全稱:Alliance Semiconductor Corporation 功能描述:2.5V 1M x 32/36 Flow-through synchronous SRAM |
| AS7C251MFT32A-10TQI | 制造商:ALSC 制造商全稱:Alliance Semiconductor Corporation 功能描述:2.5V 1M x 32/36 Flow-through synchronous SRAM |
| AS7C251MFT32A-10TQIN | 制造商:ALSC 制造商全稱:Alliance Semiconductor Corporation 功能描述:2.5V 1M x 32/36 Flow-through synchronous SRAM |
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