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參數(shù)資料
| 型號： | UPD444012AGY-C85X-MJH |
| 廠商： | NEC Corp. |
| 英文描述： | 4M-BIT CMOS STATIC RAM 256K-WORD BY 16-BIT EXTENDED TEMPERATURE OPERATION |
| 中文描述： | 4分位CMOS靜態(tài)RAM 256K字由16位溫度范圍 |
| 文件頁數(shù)： | 4/24頁 |
| 文件大?。?/td> | 143K |
| 代理商： | UPD444012AGY-C85X-MJH |
Data Sheet M14464EJ5V0DS
4
μ
PD444012A-X
Block Diagram
Address buffer
Address
buffer
Row
decoder
Memory cell array
4,194,304 bits
Input data
controller
A0
A17
I/O9 - I/O16
/CE1
/WE
/OE
CE2
/UB
/LB
Output data
controller
I/O1 - I/O8
V
CC
GND
Sense amplifier /
Switching circuit
Column decoder
Truth Table
/CE1
CE2
/OE
/WE
/LB
/UB
Mode
I/O
Supply current
I/O1 - I/O8
I/O9 - I/O16
H
×
×
×
×
×
Not selected
High impedance
High impedance
I
SB
×
L
×
×
×
×
L
H
H
H
×
×
Output disable
High impedance
High impedance
I
CCA
L
H
L
L
Word read
D
OUT
D
OUT
L
H
Lower byte read
D
OUT
High impedance
H
L
Upper byte read
High impedance
D
OUT
×
L
L
L
Word write
D
IN
D
IN
L
H
Lower byte write
D
IN
High impedance
H
L
Upper byte write
High impedance
D
IN
×
×
×
×
H
H
Not selected
High impedance
High impedance
I
SB
Remark
×
: V
IH
or V
IL
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