MX27C256 Datasheet, PDF (1/15 Pages) Macronix International – 256K-BIT [32K x 8] CMOS EPROM

FEATURES
• 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
MX27C256
256K-BIT [32K x 8] CMOS EPROM
• Operating current: 30mA
• Standby current: 100uA
• Package type:
- 28 pin plastic DIP
- 32 pin PLCC
- 28 pin 8 x 13.4mm TSOP(I)
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
BLOCK DIAGRAM
PDIP
VPP 1
A12 2
A7 3
A6 4
A5 5
A4 6
A3 7
A2 8
A1 9
A0 10
Q0 11
Q1 12
Q2 13
GND 14
28 VCC
27 A14
26 A13
25 A8
24 A9
23 A11
22 OE
21 A10
20 CE
19 Q7
18 Q6
17 Q5
16 Q4
15 Q3
PLCC
4
A6 5
A5
A4
A3
A2 9
A1
A0
NC
Q0 ¹³
14
1 32
30
29 ^A8
A9
A11
NC
MX27C256
25 OE
A10
CE
Q7
21 Q6
17
20
CE
OE
.
.
.
A0~A14
.
ADDRESS
.
INPUTS
.
.
.
VCC
GND
CONTROL
LOGIC
Y-DECODER
.
.
.
.
.
X-DECODER
.
.
.
VPP
OUTPUT
BUFFERS
Y-SELECT
256K BIT
CELL
MAXTRIX
Q0~Q7
8 x 13.4mm 28-TSOP(I)
OE
22
A11
23
A9
24
A8
25
A13
26
A14
27
VCC
28
VPP
1
A12
2
A7
3
A6
4
A5
5
A4
6
A3
7
MX27C256
21
A10
20
CE
19
Q7
18
Q6
17
Q5
16
Q4
15
Q3
14
GND
13
Q2
12
Q1
11
Q0
10
A0
9
A1
8
A2
PIN DESCRIPTION
SYMBOL
A0~A14
Q0~Q7
PIN NAME
Address Input
Data Input/Output
CE
Chip Enable Input
OE
Output Enable Input
VPP
Program Supply Voltage
NC
VCC
GND
No Internal Connection
Power Supply Pin (+5V)
Ground Pin
P/N: PM0203
1
REV. 5.6, AUG. 26, 2003