W27C512
64K ´ 8 ELECTRICALLY ERASABLE EPROM
GENERAL DESCRIPTION
The W27C512 is a high speed, low power Electrically Erasable and Programmable Read Only
´
Memory organized as 65536 8 bits that operates on a single 5 volt power supply. The W27C512
provides an electrical chip erase function.
FEATURES
· High speed access time:
45/70/90/120 nS (max.)
· +14V erase/+12V programming voltage
· Fully static operation
· Read operating current: 30 mA (max.)
· All inputs and outputs directly TTL/CMOS
· Erase/Programming operating current
compatible
30 mA (max.)
· Three-state outputs
· Standby current: 1 mA (max.)
· Single 5V power supply
· Available packages: 28-pin 600 mil DIP, 330 mil
32-pin PLCC
PIN CONFIGURATIONS
BLOCK DIAGRAM
Q0
.
.
CE
OUTPUT
BUFFER
V
CC
1
A15
A12
A7
CONTROL
28
27
26
25
24
23
22
21
20
19
18
17
16
15
2
A14
A13
A8
OE/V
PP
Q7
3
4
A6
5
A9
A5
A4
6
A11
28-pin
DIP
A0
.
7
A3
OE/Vpp
A10
CORE
8
A2
DECODER
ARRAY
.
9
A1
CE
Q7
10
11
12
13
14
A0
A15
Q6
Q5
Q4
Q3
Q0
Q1
Q2
GND
V
CC
GND
A
A
V
C
C
A
1
4
A
1
3
A 1 1 N
PIN DESCRIPTION
7
2 5 C
SYMBOL
DESCRIPTION
3
2
3
1
4
3 2 1
3
0
29
28
27
26
25
24
23
A8
A9
A11
NC
A6
5
6
7
8
9
10
11
12
13
Address Inputs
-
A0 A15
A5
A4
A3
A2
A1
A0
NC
Q0
Data Inputs/Outputs
Chip Enable
-
Q0 Q7
32-pin
PLCC
OE/Vpp
A10
CE
CE
Q7
Q6
22
21
Output Enable, Program/Erase
Supply Voltage
1
1
8
1
9
2
0
PP
OE
1
4
1
5
1
6
/V
7
CC
V
Power Supply
Ground
Q
1
Q
2
Q
4
G
N
D
Q
3
Q
5
N
C
GND
NC
No Connection
Publication Release Date: November 1999
Revision A4
- 1 -
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