Rainbow Electronics W27E040 - Manual

W27E040
512K
×
8 ELECTRICALLY ERASABLE EPROM
Publication Release Date: May 1997
- 1 - Revision A1
GENERAL DESCRIPTION
The W27E040 is a high speed, low power Electrically Erasable and Programmable Read Only
Memory organized as 524288
×
8 bits that operates on a single 5 volt power supply. The W27E040
provides an electrical chip erase function.
FEATURES
• High speed access time:
90/120 nS (max.)
• Read operating current: 15 mA (typ.)
• Erase/Programming operating current
15 mA (typ.)
• Standby current: 5
µ
A (typ.)
• Single 5V power supply
• +14V erase/+12V programming voltage
• Fully static operation
• All inputs and outputs directly TTL/CMOS
compatible
•
Three-state outputs
• Available packages: 32-pin 600 mil DIP, 450
mil SOP, PLCC and TSOP
PIN CONFIGURATIONS
5
6
7
9
10
11
12
13
A7
A6
A5
A4
A3
A2
A1
A0
Q0
29
28
27
26
25
24
23
22
21
30 31 32 1 2 3 4
8
20 19 18 17 16 15 14
Q
1 Q
2
G
N
D Q
3 Q
4
Q
5
Q
6
A14
A13
A8
A9
A11
OE
A10
CE
Q7
A
1
2 V
C
C
32-pin
PLCC
A
1
5 A
1
6 V
P
P A
1
8 A
1
7
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16 A3
A2
A1
A0
Q0
Q1
Q2
GND
OE
A10
CE
Q7
Q6
Q5
Q4
Q3
32-pin
TSOP
A15
A12
A7
A6
A5
A4
V
A14
A13
A8
CC
A11
A9
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
A17
A18
V PP
A16
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
A16
A15
A12
A7
A6
A5
A4
A3
A2
A1
A0
Q0
Q1
Q2
GND
V
A18
A8
A9
A11
OE
A10
CE
Q7
Q6
Q5
Q4
Q3
CC
V PP
A14
A13
A17
32-pin
DIP
BLOCK DIAGRAM
CE
OE
CONTROL
OUTPUT
BUFFER
DECODER
CORE
ARRAY
Q0
Q7
.
.
A0
.
.
A18
V
GND
CC
VPP
PIN DESCRIPTION
SYMBOL DESCRIPTION
A0
−
A18 Address Inputs
Q0
−
Q7 Data Inputs/Outputs
CE Chip Enable
OE Output Enable
V PP Program/Erase Supply Voltage
V CC Power Supply
GND Ground
NC No Connection