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UPD448012-B55X データシートの表示(PDF) - NEC => Renesas Technology
部品番号
コンポーネント説明
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UPD448012-B55X
8M-BIT CMOS STATIC RAM 512K-WORD BY 16-BIT EXTENDED TEMPERATURE OPERATION
NEC => Renesas Technology
UPD448012-B55X Datasheet PDF : 24 Pages
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Block Diagram
V
CC
GND
A0
A18
I/O1 - I/O8
I/O9 - I/O16
µ
PD448012-X
Address
buffer
Row
decoder
Memory cell array
8,388,608 bits
Input data
controller
Sense amplifier /
Switching circuit
Column decoder
Address buffer
Output data
controller
/CE1
CE2
/LB
/UB
/WE
/OE
Truth Table
/CE1 CE2 /OE /WE /LB /UB
Mode
I/O
I/O1 - I/O8
I/O9 - I/O16
Supply current
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
4
Data Sheet M14466EJ5V0DS
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