鈥?/div>
100% Compatible to AT45DB081 and AT45DB081A
Single 2.5V - 3.0V or 2.7V - 3.6V Supply
Serial Interface Architecture
Page Program Operation
鈥?Single Cycle Reprogram (Erase and Program)
鈥?4096 Pages (264 Bytes/Page) Main Memory
Optional Page and Block Erase Operations
Two 264-byte SRAM Data Buffers 鈥?Allows Receiving of Data
while Reprogramming of Nonvolatile Memory
Continuous Read Capability through Entire Array
Internal Program and Control Timer
Low Power Dissipation
鈥?4 mA Active Read Current Typical
鈥?2 碌A CMOS Standby Current Typical
20 MHz Max Clock Frequency
Hardware Data Protection Feature
Serial Peripheral Interface (SPI) Compatible 鈥?Modes 0 and 3
CMOS and TTL Compatible Inputs and Outputs
5.0V-tolerant Inputs: SI, SCK, CS, RESET and WP Pins
Commercial and Industrial Temperature Ranges
8-megabit
2.5-volt Only
Serial
DataFlash
廬
AT45DB081B
Description
The AT45DB081B is a 2.5-volt only, serial interface Flash memory suitable for
in-system reprogramming. Its 8,650,752 bits of memory are organized as 4096 pages
of 264 bytes each. In addition to the main memory, the AT45DB081B also contains
two SRAM data buffers of 264 bytes each. The buffers allow receiving of data while a
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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
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
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
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
A
NC
NC
VCC
B
SCK
GND
C
CS RDY/BSY WP
D
SO
SI
NC
RESET
NC
E
NC
Rev. 2225A鈥?1/01
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