Features
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Single 2.5V - 3.6V or 2.7V - 3.6V Supply
Serial Peripheral Interface (SPI) Compatible
20 MHz Max Clock Frequency
Page Program Operation
– Single Cycle Reprogram (Erase and Program)
– 2048 Pages (264 Bytes/Page) Main Memory
Supports 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
Low Power Dissipation
– 4 mA Active Read Current Typical
– 2 µA CMOS Standby Current Typical
Hardware Data Protection Feature
100% Compatible to AT45DB041 and AT45DB041A
5.0V-tolerant Inputs: SI, SCK, CS, RESET, and WP Pins
Commercial and Industrial Temperature Ranges
4-megabit
2.5-volt Only or
2.7-volt Only
DataFlash
®
AT45DB041B
Description
The AT45DB041B is a 2.5-volt or 2.7-volt only, serial interface Flash memory ideally
suited for a wide variety of digital voice-, image-, program code- and data-storage
applications. Its 4,325,376 bits of memory are organized as 2048 pages of 264 bytes
each. In addition to the main memory, the AT45DB041B also contains two SRAM data
buffers of 264 bytes each. The buffers allow receiving of data while a page in the main
memor y is being reprogrammed, as well as reading or writing a continuous
data stream. EEPROM emulation (bit or byte alterability) is easily handled with a self-
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
GND
NC
NC
CS
SCK
SI
SO
NC
NC
NC
NC
NC
NC
NC
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
TSOP Top View
Type 1
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
28-SOIC
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
VCC
NC
NC
WP
RESET
RDY/BUSY
NC
NC
NC
NC
NC
NC
NC
NC
CBGA Top View
through Package
1
2
3
A
NC
NC
VCC
8-SOIC
SI
SCK
RESET
CS
1
2
3
4
8
7
6
5
SO
GND
VCC
WP
B
SCK
GND
C
CS RDY/BSY WP
D
SO
SI
NC
RESET
NC
E
NC
Rev. 1938F–DFLSH–10/02
1
ATMEL [ ATMEL CORPORATION ]
