Features
• Single-voltage Operation
•
•
•
•
•
•
•
•
•
– 5V Read
– 5V Reprogramming
Fast Read Access Time – 55 ns
Internal Program Control and Timer
16-Kbyte Boot Block with Lockout
Fast Erase Cycle Time – 10 seconds
Byte-by-byte Programming – 50 µs/Byte
Hardware Data Protection
DATA Polling for End of Program Detection
Low Power Dissipation
– 50 mA Active Current
– 100 µA CMOS Standby Current
Typical 10,000 Write Cycles
Description
The AT49F040 is a 5-volt-only in-system Flash Memory. Its 4 megabits of memory is
organized as 524,288 words by 8 bits. Manufactured with Atmel’s advanced nonvolatile CMOS technology, the device offers access times to 55 ns with power dissipation
of just 275 mW over the commercial temperature range. When the device is deselected, the CMOS standby current is less than 100 µA.
The device contains a user-enabled “boot block” protection feature. The AT49F040
locates the boot block at lowest order addresses (“bottom boot”).
(continued)
Pin Configurations
Function
A0 - A18
Addresses
CE
Chip Enable
OE
Output Enable
WE
Write Enable
I/O0 - I/O7
Data Inputs/Outputs
A18
A16
A15
A12
A7
A6
A5
A4
A3
A2
A1
A0
I/O0
I/O1
I/O2
GND
TSOP Top View
Type 1
Not Recommended
for New Design
Contact Atmel to discuss
the latest design in trends
and options
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
WE
A17
A14
A13
A8
A9
A11
OE
A10
CE
I/O7
I/O6
I/O5
I/O4
I/O3
A7
A6
A5
A4
A3
A2
A1
A0
I/O0
4
3
2
1
32
31
30
OE
A10
CE
I/O7
I/O6
I/O5
I/O4
I/O3
GND
I/O2
I/O1
I/O0
A0
A1
A2
A3
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
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
A12
A15
A16
A18
VCC
WE
A17
PLCC Top View
A14
A13
A8
A9
A11
OE
A10
CE
I/O7
I/O1
I/O2
GND
I/O3
I/O4
I/O5
I/O6
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
AT49F040
DIP Top View
Pin Name
A11
A9
A8
A13
A14
A17
WE
VCC
A18
A16
A15
A12
A7
A6
A5
A4
4-megabit
(512K x 8)
5-volt Only
Flash Memory
Rev. 0998D–03/01
1
