OKI MSM534022E Datasheet
Semiconductor
MSM534022E
262,144-Word x 16-Bit or 524,288-Word x 8-Bit MASKROM
DESCRIPTION
The OKI MSM534022E is a high-speed CMOS Mask ROM that can electrically switch
between 262,144-word x 16-bit and 524,288-word x -bit configurations. The MSM534022E
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 MSM534022E 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
80ns 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
1
MSM534022E
PIN CONFIGURATION
1
A17
2
A7
3
A6
4
A5
5
A4
6
A3
7
A2
8
A1
9
A0
10
CE
11
V
SS
12
OE
13
D0
14
D8
15
D1
16
D9 D13
17
D2 D5
18
D10
19
D3
20
D11 V
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
A8
A9
A10
A11
A12
A13
A14
A15
A16
BYTE
V
SS
D15/A-1
D7
D14
D6
D12
D4
CC
1
NC
2
NC
3
A17
4
A7
5
A6
6
A5
7
A4
8
A3
9
A2
10
A1
11
A0
12
CE
13
V
SS
14
OE
15
D0
16
D8
17
D1
18
D9 D13
19
D2 D5
20
D10
21
D3
22
D11 V
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
NC
NC
A8
A9
A10
A11
A12
A13
A14
A15
A16
BYTE
V
SS
D15/A-1
D7
D14
D6
D12
D4
CC
40PINDIP/SOP
Pin Name
D15/A-1
A0 to A17
D0 to D15
CE
OE
BYTE
, V
V
CC
SS
44PINTSOP
Function
Data output / address input
Address input
Data output
Chip enable
Output enable
Mode switch
Power supply
2
BLOCK DIAGRAM
VCCV
SS
MSM534022E
A-1 BYTE
Output Switching Between 8 and 16 bits
CE OE
CE ControlOE
A0
A1
A2
A3
A4
A5
A6
A7
A8
Address
Buffer
A9
A10
A11
A12
A13
A14
A15
A16
A17
FUNCTION TABLE
OE
CE
H
L
L
L
L
BYTE
X
X
H
X
L
L
L
Input Inhibited (D15)
H
L
L
X
Decoder
Y
Decoder
X
X
L
H
262,144-Word x 16 or 524,288 x 8
D0
D1D2D3D4D5D6D7D8D9
D8 to D15D0 to D7A-1/D15
Hi-Z
Hi-Z
D0 to D7
D0 to D7
D8 to D15
Hi-Z
Hi-Z
D8 to D15
Hi-Z
Hi-Z
Memory Cell
Matrix
Multiplexer
Output Buffer
D
OUT
16 bit
D10
Mode
Hi-Z
8 bit
D11
D12
D14
D13
D15
LSB
——
A0
A-1
MSB
A17
A17
3
Loading...