Features
• 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-megabit
– 4 mA Active Read Current Typical
2.5-volt Only or
2.7-volt Only
DataFlash®
– 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
Description
AT45DB041B
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
memory 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-
TSOP Top View
Pin Configurations
Type 1
Pin Name
Function
RDY/BUSY
RESET
WP
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
2
CS
Chip Select
Serial Clock
Serial Input
Serial Output
3
NC
4
SCK
SI
NC
5
VCC
GND
NC
6
7
8
NC
9
SO
NC
10
11
12
13
14
CS
SCK
SI
Hardware Page Write
Protect Pin
WP
SO
RESET
Chip Reset
Ready/Busy
RDY/BUSY
28-SOIC
CBGA Top View
through Package
GND
NC
NC
CS
SCK
SI
1
28
27
26
25
24
23
22
21
20
19
18
17
16
15
VCC
NC
1
2
3
2
3
NC
4
WP
A
B
C
D
E
5
RESET
RDY/BUSY
NC
NC
NC
6
8-SOIC
SO
NC
NC
NC
NC
NC
NC
NC
7
SCK
GND
VCC
8
NC
9
NC
CS RDY/BSY WP
SI
SCK
1
2
3
4
8
7
6
5
SO
10
11
12
13
14
NC
GND
VCC
WP
SO
NC
SI
RESET
NC
NC
RESET
CS
NC
NC
NC
NC
Rev. 1938F–DFLSH–10/02
1