Features
• Fast Read Access Time – 70 ns
• Low Power CMOS Operation
•
•
•
•
•
•
•
– 100 µA Max Standby
– 30 mA Max Active at 5 MHz
JEDEC Standard Packages
– 32-lead, 600-mil PDIP
– 32-lead PLCC
– 32-lead TSOP
5V ± 10% Supply
High Reliability CMOS Technology
– 2000V ESD Protection
– 200 mA Latchup Immunity
Rapid™ Programming Algorithm – 100 µs/Byte (Typical)
CMOS and TTL Compatible Inputs and Outputs
Integrated Product Identification Code
Commercial and Industrial Temperature Ranges
4-Megabit
(512K x 8)
OTP EPROM
AT27C040
Description
The AT27C040 chip is a low-power, high-performance, 4,194,304-bit one-time programmable read-only memory (OTP EPROM) organized as 512K by 8 bits. The
AT27C040 requires only one 5V power supply in normal read mode operation. Any
byte can be accessed in less than 70 ns, eliminating the need for speed reducing
WAIT states on high-performance microprocessor systems.
TSOP Top View
Pin Configurations
Outputs
CE
Chip Enable
OE
Output Enable
PDIP Top View
VPP
A16
A15
A12
A7
A6
A5
A4
A3
A2
A1
A0
O0
O1
O2
GND
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
VCC
A18
A17
A14
A13
A8
A9
A11
OE
A10
CE
07
06
05
04
03
OE
A10
CE
07
06
05
04
03
GND
02
01
O0
A0
A1
A2
A3
PLCC Top View
A12
A15
A16
VPP
VCC
A18
A17
O0 - O7
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
A7
A6
A5
A4
A3
A2
A1
A0
O0
4
3
2
1
32
31
30
Addresses
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
5
6
7
8
9
10
11
12
13
29
28
27
26
25
24
23
22
21
14
15
16
17
18
19
20
A0 - A18
A11
A9
A8
A13
A14
A17
A18
VCC
VPP
A16
A15
A12
A7
A6
A5
A4
Function
01
02
GND
03
04
05
06
Pin Name
A14
A13
A8
A9
A11
OE
A10
CE
07
0189F–EPROM–4/03
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