Semiconductor
1
262,144-Word x 16-Bit or 524,288-Word x 8-Bit MASKROM
DESCRIPTION
The OKI MSM534002E is a high-speed CMOS Mask ROM that can electrically switch
between 262,144-word x 16-bit and 524,288-word x 8-bit configurations. The MSM534002E
operates on a single 5.0V power supply and is TTL compatible. The chip's asynchronous I/O
requires no external clock assuring easy operation. A power-down mode provides low power
dissipation when the chip is not selected. The CE and OE pins are provided as control
signals that permit three-stated output allowing easy memory expansion on a system bus.
The MSM534002E is suited for use as large capacity fixed memory for microcomputers and
data terminals.
FEATURES
Single 5.0V power supply
262,144-words x 16-bit/524,288-words x 8-bit
Access time
100ns MAX
Input/Output TTL compatible
Tri-State output configurations
Internal powerdown function
Packages
40-PIN PLASTIC DIP (DIP40-P-600-2.54)
40-PIN PLASTIC SOP (SOP40-P-525-1.27-K)
44-PIN PLASTIC TSOP (TSOPII44-P-400-0.80-K)
4MEPROM (40-PIN) pin compatible
MSM534002E
MSM534002E
3
A0
A1
A2
A3
A4
A5
A6
A7
A8
A9
A10
A11
A12
A13
A14
A15
A16
A17
BLOCK DIAGRAM
D0
CE
OE
CE
Control
OE
Address
Buffer
Memory Cell
Matrix
262,144-Word x 16 or 524,288 x 8
Multiplexer
Output Buffer
FUNCTION TABLE
D1
D2
D3
D4
D5
D6
D7
D8
D9
D10
D11
D12
D13
D14
D15
Output Switching Between 8 and 16 bits
A-1
BYTE
X
Decoder
Y
Decoder
CE
H
MSB
L
L
L
L
OE
X
H
L
L
L
BYTE
X
X
H
L
L
Input Inhibited (D15)
D8 to D15
LSB
DOUT Mode
D8 to D15
D0 to D7
A-1/D15
X
X
L
H
D0 to D7
D0 to D7
Hi-Z
Hi-Z
Hi-Z
Hi-Z
D8 to D15
Hi-Z
Hi-Z
Hi-Z
16 bit
8 bit
A0
A-1
A17
A17
V
CC
V
SS
--
--
MSM534002E
4
Recommended Operating Conditions
ELECTRICAL CHARACTERISTICS
Absolute Maximum Ratings
Operating Temperature
Storage Temperature
Power Supply Voltage
Input Voltage
Output Voltage
Power Dissipation
Parameter
Symbol
Unit
Rated Value
Conditions
Power Supply Voltage
"H" Input Voltage
"L" Input Voltage
Parameter
Symbol
Unit
5.5
Typ.
4.5
Conditions
V
V
V
W
--
Min.
Max.
5.0
V
0.0
0.0
0.0
V
2.2
5.0
V
0.8
0.0
V
--
Operating Temperature
70
0
Rated Value
"H" Output Voltage
"L" Output Voltage
Parameter
Symbol
Unit
Typ.
2.4
Conditions
Min.
Max.
Power Supply Current
(Operating)
V
0.4
V
10
µA
45
mA
50
µA
500
µA
Input Leakage Current
Output Leakage Current
Power Supply Current
(Standby)
10
µA
DC Characteristics
Rated Value
(V
CC
= 5V±10%, Ta = 0 to 70°C)
0.3 to 7
0.3 to V
CC
+ 0.5
0.3 to V
CC
+ 0.5
0 to 70
55 to 150
1.0
°C
°C
Per Package T
opr
= 25°C
to V
SS
--
--
--
--
--
0.3
--
°C
I
OH
= 400µA
I
OH
= 2.1mA
10
10
--
--
--
--
--
--
--
--
--
--
--
--
CE = V
CC
0.2V
CE = V
IH MIN
V
I
= 0 to V
CC
V
O
= 0 to V
CC
CE = V
IH MIN
CE = V
IL
,
OE = V
IH,
t
C
= 100ns
V
OH
I
LI
I
LO
I
CC
I
CCS
I
CCS1
V
OL
T
opr
T
stg
V
CC
V
I
V
O
P
D
V
CC
V
SS
V
IH
V
IL
T
opr
V
CC
+ 0.5
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