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Semiconductor
MR27V452D
262,144-Word x 16-Bit or 524,288-Word x 8-Bit
8-Word x 16-Bit or 16-Word x 8-Bit Page Mode One Time PROM
DESCRIPTION
The MR27V452D is a 4Mbit electrically Programmable Read-Only Memory with page mode. Its
configuration can be electrically switched between 262,144 word x 16bit and 524,288 word x 8bit.
The MR27V452D operates on a single +3.3V power supply and is TTL compatible. The MR27V452D
provides Page mode which can greatly reduce the read access time. Since the MR27V452D
operates asynchronously , external clocks are not required , making this device easy-to-use. The
MR27V452D is suitable as large-capacity fixed memory for microcomputers and data terminals. It is
manufactured using a CMOS double silicon gate technology and is offered in 40-pin DIP , 40-pin
SOP or 44-pin TSOP packages.
FEATURES
• 262,144 word x 16bit / 524,288 word x 8bit electrically switchable configuration
• Single +3.3V power supply
• Access time 100ns
Page mode access time 30ns
• Input / Output TTL compatible
• Three-state output
• Packages
40-pin plastic DIP (DIP40-P-600-2.54) (Product name : MR27V452DRP)
40-pin plastic SOP (SOP40-P-525-1.27-K) (Product name : MR27V452DMP)
44-pin plastic TSOP (TSOP II 44-P-400-0.80-K) (Product name : MR27V452DTP)
1A
November 1999
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PIN CONFIGURATION (TOP VIEW)
MR27V452D
A17
A7
A6
A5
A4
A3
A2
A1
A0
CE
V
SS
OE
D0
D8
D1
D9
D2
D10
D3
D11
10
11
12
13
14
15
16
17
18
19
20
NC
1
NC
2
1
2
3
4
5
6
7
8
9
A8
40
A9
39
A10
38
A11
37
A12
36
A13
35
A14
34
A15
33
A16
32
31
BYTE/Vpp
V
30
D15/A-1
29
D7
28
D14
27
D6
26
D13
25
D5
24
D12
23
D4
22
V
21
SS
CC
A17
A7
A6
A5
A4
A3
A2
A1
A0
CE
V
SS
OE
D0
D8
D1
D9
D2
D10
D3
D11
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
NC
44
NC
43
A8
42
A9
41
A10
40
A11
39
A12
38
A13
37
A14
36
A15
35
A16
34
33
BYTE/Vpp
V
32
D15/A-1
31
D7
30
D14
29
D6
28
D13
27
D5
26
D12
25
D4
24
V
2322
SS
CC
40-pin DIP , SOP
PIN NAMES
FUNCTIONS
D15/A-1 Data output / Address input
A0 - A17 Address input
D0 - D14 Data output
CE
OE
V
CC
V
SS
BYTE/V
NC
PP
Chip enable
Output enable
Power supply voltage
GND
Mode switch / Program power supply voltage
Non connection
44-pin TSOP (II)
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BLOCK DIAGRAM
MR27V452D
A-1
X8/X16 Switch
A0
A1
A2
A3
A4
A5
A6
A7
A8
A9
A10
A11
A12
A13
A14
A15
A16
A17
Address Buffer
CE BYTE/V
OE
CE PGMOE
Memory Matrix
Row Decoder
262,144X16-Bit or 524,288X8-Bit
Multiplexer & Page Data Latch
Output Buffer
Column Decoder
D0
D1D2D3D4D5D6D7D8D9
PP
D10
D11
D12
D13
D14
D15
FUNCTION TABLE
MODE
READ (16-Bit)
READ (8-Bit)
OUTPUT DISABLE
STAND-BY
PROGRAM
PROGRAM INHIBIT
PROGRAM VERIFY
* : Don't Care
In 8-bit output mode, these pins are
three-stated and pin D15 functions
as the A-1 address pin.
PP
V
CC
3.3V
4.0V
D
OUT
D8 - D14D0 - D7
D
Hi-Z
Hi-Z
Hi-Z
D
D
L
H
*
BYTE/V
H
L
H
L
H
L
CE OE
LL
L
L
H
LH
H H Hi-Z
9.75V
HL
D15/A-1
OUT
L/H
*
*
IN
OUT
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