Features
•
•
•
•
•
•
•
•
•
•
•
•
•
•
100% Compatible to AT45DB041
Single 2.5V - 3.0V or 2.7V - 3.6V Supply
Serial Interface Architecture
Page Program Operation
– Single Cycle Reprogram (Erase and Program)
– 2048 Pages (264 Bytes/Page) Main Memory
Optional Page and Block Erase Operations
Two 264-byte SRAM Data Buffers – Allows Receiving of Data
while Reprogramming of Nonvolatile Memory
Continuous Read Capability through Entire Array
Internal Program and Control Timer
Low Power Dissipation
– 4 mA Active Read Current Typical
– 2 µA CMOS Standby Current Typical
13 MHz Max Clock Frequency
Hardware Data Protection Feature
Serial Peripheral Interface (SPI) Compatible – Modes 0 and 3
CMOS and TTL Compatible Inputs and Outputs
Commercial and Industrial Temperature Ranges
4-megabit
2.5-volt Only
Serial
DataFlash
®
AT45DB041A
Recommend using
AT45DB041B for new
designs.
Description
The AT45DB041A is a 2.5-volt only, serial interface Flash memory suitable for
in-system reprogramming. Its 4,325,376 bits of memory are organized as 2048 pages
of 264 bytes each. In addition to the main memory, the AT45DB041A also contains
two SRAM data buffers of 264 bytes each. The buffers allow receiving of data while
a page in the main memory is being reprogrammed. Unlike conventional Flash
(continued)
Pin Configurations
Pin Name
CS
SCK
SI
SO
WP
RESET
RDY/BUSY
Function
Chip Select
Serial Clock
Serial Input
Serial Output
Hardware Page Write
Protect Pin
Chip Reset
Ready/Busy
PLCC
CS
NC
NC
GND
VCC
NC
NC
GND
NC
NC
CS
SCK
SI
SO
NC
NC
NC
NC
NC
NC
NC
1
2
3
4
5
6
7
8
9
10
11
12
13
14
RDY/BUSY
RESET
WP
NC
NC
VCC
GND
NC
NC
NC
CS
SCK
SI
SO
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28
27
26
25
24
23
22
21
20
19
18
17
16
15
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
TSOP Top View
Type 1
SOIC
28
27
26
25
24
23
22
21
20
19
18
17
16
15
VCC
NC
NC
WP
RESET
RDY/BUSY
NC
NC
NC
NC
NC
NC
NC
NC
CBGA Top View
Through Package
1
2
3
14
15
16
17
18
19
20
SCK
SI
SO
NC
NC
NC
NC
NC
NC
5
6
7
8
9
10
11
12
13
4
3
2
1
32
31
30
29
28
27
26
25
24
23
22
21
WP
RESET
RDY/BUSY
NC
NC
NC
NC
NC
NC
A
NC
NC
VCC
B
SCK
GND
C
CS RDY/BSY WP
D
SO
SI
NC
RESET
NC
NC
NC
DC
DC
NC
NC
NC
E
NC
Rev. 1432D–01/01
Note: PLCC package pins 16
and 17 are DON’T CONNECT.
1
ATMEL [ ATMEL CORPORATION ]
