Features
• Fast Read Access Time - 90 ns
• Dual Voltage Range Operation
– Low Voltage Power Supply Range, 3.0V to 3.6V
or Standard 5V ± 10% Supply Range
• Compatible With JEDEC Standard AT27C040
• Low Power 3.3-volt CMOS Operation
– 20 µA max. (less than 1 µA typical) Standby for VCC = 3.6V
– 36 mW max. Active at 5 MHz for VCC = 3.6V
• JEDEC Standard Packages
– 32-Lead PLCC
– 32-Lead TSOP (8 x 20 mm)
– 32-Lead VSOP (8 x 14 mm)
4-Megabit
(512K x 8)
• High Reliability CMOS Technology
– 2,000V ESD Protection
Low Voltage
OTP EPROM
– 200 mA Latchup Immunity
• Rapid™ Programming Algorithm - 100 µs/byte (typical)
• CMOS and TTL Compatible Inputs and Outputs
– JEDEC Standard for LVTTL
• Integrated Product Identification Code
• Commercial and Industrial Temperature Ranges
AT27LV040A
Description
The AT27LV040A is a high performance, low power, low voltage, 4,194,304-bit one-
time programmable read only memory (OTP EPROM) organized as 512K by 8 bits. It
requires only one supply in the range of 3.0 to 3.6V in normal read mode operation,
making it ideal for fast, portable systems using battery power.
Atmel’s innovative design techniques provide fast speeds that rival 5V parts while
keeping the low power consumption of a 3V supply. At VCC = 3.0V, any byte can be
accessed in less than 90 ns. With a typical power dissipation of only 18 mW at 5 MHz
and VCC = 3.3V, the AT27LV040A consumes less than one half the power of a stan-
dard 5V EPROM. Standby mode supply current is typically less than 1 µA at 3.3V.
(continued)
Pin Configurations
Pin Name
A0 - A18
O0 - O7
CE
Function
Addresses
Outputs
TSOP, VSOP Top View
Chip Enable
Output Enable
Type 1
OE
A11
A9
1
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
OE
A10
CE
O7
O6
O5
O4
O3
GND
02
2
PLCC Top View
A8
3
A13
A14
A17
A18
VCC
VPP
A16
A15
A12
A7
4
5
6
A7
A6
A5
A4
A3
5
6
7
8
9
29 A14
28 A13
27 A8
26 A9
25 A11
24 OE
23 A10
22 CE
21 O7
7
8
9
10
11
12
13
14
15
16
01
A2 10
A1 11
A0 12
O0 13
O0
A0
A6
A1
A5
A2
Rev. 0557B–10/98
A4
A3
1