MX27C256
FEATURES
256K-BIT [32K x 8] CMOS EPROM
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Operating current: 30mA
•
Standby current: 100uA
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Package type:
- 28 pin plastic DIP
- 32 pin PLCC
- 28 pin 8 x 13.4mm TSOP(I)
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32K x 8 organization
Single +5V power supply
+12.5V programming voltage
Fast access time: 45/55/70/90/100/120/150 ns
Totally static operation
Completely TTL compatible
GENERAL DESCRIPTION
The MX27C256 is a 5V only, 256K-bit, One-Time
Programmable Read Only Memory. It is organized as
32K by 8 bits, operates from a single + 5volt supply, has
a static standby mode, and features fast single address
location programming. All programming signals are TTL
levels, requiring a single pulse. For programming from
outside the system, existing EPROM programmers
may be used. The MX27C256 supports intelligent fast
programming algorithm which can result in program-
ming time of less than ten seconds.
This EPROM is packaged in industry standard 28 pin
dual-in-line packages, 32 lead PLCC, and 28 lead
TSOP(I) packages.
PIN CONFIGURATIONS
PDIP
VPP
A12
A7
A6
A5
A4
A3
A2
A1
A0
Q0
Q1
Q2
GND
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28
27
26
25
24
23
22
21
20
19
18
17
16
15
VCC
A14
A13
A8
A9
A11
OE
A10
CE
Q7
Q6
Q5
Q4
Q3
BLOCK DIAGRAM
PLCC
CE
OE
VCC
VPP
A12
A14
A13
CONTROL
LOGIC
OUTPUT
BUFFERS
A6
A5
A4
A3
A2
A1
A0
NC
Q0
5
4
NC
A7
Q0~Q7
1
32
30
29
A8
A9
A11
NC
A0~A14
ADDRESS
INPUTS
.
.
.
.
.
.
.
.
VCC
GND
VPP
Y-DECODER
.
.
.
.
.
.
.
.
Y-SELECT
MX27C256
9
MX27C256
25
OE
A10
CE
Q7
X-DECODER
256K BIT
CELL
MAXTRIX
13
14
Q1
Q2
GND
17
NC
Q3
Q4
21
20
Q5
Q6
8 x 13.4mm 28-TSOP(I)
OE
A11
A9
A8
A13
A14
VCC
VPP
A12
A7
A6
A5
A4
A3
22
23
24
25
26
27
28
1
2
3
4
5
6
7
21
20
19
18
17
16
15
14
13
12
11
10
9
8
A10
CE
Q7
Q6
Q5
Q4
Q3
GND
Q2
Q1
Q0
A0
A1
A2
PIN DESCRIPTION
SYMBOL
A0~A14
Q0~Q7
CE
OE
VPP
NC
VCC
GND
PIN NAME
Address Input
Data Input/Output
Chip Enable Input
Output Enable Input
Program Supply Voltage
No Internal Connection
Power Supply Pin (+5V)
Ground Pin
MX27C256
P/N: PM0203
1
REV. 5.6, AUG. 26, 2003
MCNIX [ MACRONIX INTERNATIONAL ]
