AT27C040 Datasheet, PDF (1/13 Pages) ATMEL Corporation – 4-Megabit 512K x 8 OTP EPROM

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
Description
The AT27C040 chip is a low-power, high-performance, 4,194,304-bit one-time pro-
grammable 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.
Pin Configurations
Pin Name
Function
A0 - A18
Addresses
O0 - O7
CE
Outputs
Chip Enable
OE
Output Enable
PDIP Top View
VPP 1
A16 2
A15 3
A12 4
A7 5
A6 6
A5 7
A4 8
A3 9
A2 10
A1 11
A0 12
O0 13
O1 14
O2 15
GND 16
32 VCC
31 A18
30 A17
29 A14
28 A13
27 A8
26 A9
25 A11
24 OE
23 A10
22 CE
21 07
20 06
19 05
18 04
17 03
TSOP Top View
A11 1
A9 2
A8 3
A13 4
A14 5
A17 6
A18 7
VCC 8
VPP 9
A16 10
A15 11
A12 12
A7 13
A6 14
A5 15
A4 16
32 OE
31 A10
30 CE
29 07
28 06
27 05
26 04
25 03
24 GND
23 02
22 01
21 O0
20 A0
19 A1
18 A2
17 A3
PLCC Top View
A7 5
A6 6
A5 7
A4 8
A3 9
A2 10
A1 11
A0 12
O0 13
29 A14
28 A13
27 A8
26 A9
25 A11
24 OE
23 A10
22 CE
21 07
4-Megabit
(512K x 8)
OTP EPROM
AT27C040
0189F–EPROM–4/03
1