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參數(shù)資料
| 型號： | AS7C252MFT18A-75TQI |
| 廠商： | ALLIANCE SEMICONDUCTOR CORP |
| 元件分類： | DRAM |
| 英文描述： | CARD READER FULL INSERT 2 TRACK |
| 中文描述： | 2M X 18 STANDARD SRAM, 7.5 ns, PQFP100 |
| 封裝： | 14 X 20 MM, TQFP-100 |
| 文件頁數(shù)： | 6/19頁 |
| 文件大小： | 508K |
| 代理商： | AS7C252MFT18A-75TQI |
AS7C252MFT18A
1/17/05, v 1.2
Alliance Semiconductor
6 of 19
Write enable truth table (per byte)
Key:
X = don’t care, L = low, H = high, n = a, b;
BWE
,
BWn
= 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
BWE
BWa
BWb
Write All Bytes
L
X
X
X
H
L
L
L
Write Byte a
H
L
L
H
Write Byte b
H
L
H
L
Read
H
H
X
X
H
L
H
H
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 |
|---|---|
| AS7C252MFT18A-75TQIN | CARD READER FULL INSERT RS-232 |
| AS7C252MFT18A-85TQC | CARD READER FULL INSERT USB |
| AS7C252MFT18A-85TQCN | CARD READER 3 TRACK FULL INSERT |
| AS7C252MNTD18A-133TQI | VACUUM BASE #381 PANAVISE |
| AS7C252MNTD18A-200TQIN | 2.5V 2M x 18 Pipelined SRAM with NTD |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AS7C252MFT18A-75TQIN | 制造商:ALSC 制造商全稱:Alliance Semiconductor Corporation 功能描述:2.5V 2M x 18 Flow-through synchronous SRAM |
| AS7C252MFT18A-85TQC | 制造商:ALSC 制造商全稱:Alliance Semiconductor Corporation 功能描述:2.5V 2M x 18 Flow-through synchronous SRAM |
| AS7C252MFT18A-85TQCN | 制造商:ALSC 制造商全稱:Alliance Semiconductor Corporation 功能描述:2.5V 2M x 18 Flow-through synchronous SRAM |
| AS7C252MFT18A-85TQI | 制造商:ALSC 制造商全稱:Alliance Semiconductor Corporation 功能描述:2.5V 2M x 18 Flow-through synchronous SRAM |
| AS7C252MFT18A-85TQIN | 制造商:ALSC 制造商全稱:Alliance Semiconductor Corporation 功能描述:2.5V 2M x 18 Flow-through synchronous SRAM |
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