0189F–EPROM–4/03
4-Megabit
(512K x 8)
OTP EPROM
AT27C040
PDIP Top View
A0 - A18 Addresses
O0 - O7 Outputs
CE Chip Enable
OE Output Enable
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
VPP
A16
A15
A12
A7
A6
A5
A4
A3
A2
A1
A0
O0
O1
O2
GND
VCC
A18
A17
A14
A13
A8
A9
A11
OE
A10
CE
07
06
05
04
03
PLCC Top View
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
A9
A8
A13
A14
A17
A18
VCC
VPP
A16
A15
A12
A7
A6
A5
A4
A10
CE
07
06
05
04
03
GND
02
01
O0
A0
A1
A2
A3
5
6
7
8
9
10
11
12
13
29
28
27
26
25
24
23
22
21
A7
A6
A5
A4
A3
A2
A1
A0
O0
A14
A13
A8
A9
A11
OE
A10
CE
07
4 3 2 1
32 31 30
14 15 16 17 18 19 20
01 02
GND
03 04 05 06
A12 A15 A16 VPP VCC A18 A17
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/By
CMOS and TTL Compatible Inputs and Outp
Integrated Product Identification Code
Commercial and Industrial Temperature Rang
Description
The AT27C040 chip is a low-power, high-p
grammable read-only memory (OTP EPR
AT27C040 requires only one 5V power supp
byte can be accessed in less than 70 ns, el
WAIT states on high-performance microproc
Pin Configurations
Pin Name Function
te (Typical)
uts
es
erformance, 4,194,304-bit one-time pro-
OM) organized as 512K by 8 bits. The
ly in normal read mode operation. Any
iminating the need for speed reducing
essor systems.
TSOP Top View
1 32A11 OE
1