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AT45DB021B-CC Datasheet(PDF) 1 Page - ATMEL Corporation

Part # AT45DB021B-CC
Description  2-megabit 2.7-volt Only DataFlash
Download  33 Pages
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Manufacturer  ATMEL [ATMEL Corporation]
Direct Link  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

AT45DB021B-CC Datasheet(HTML) 1 Page - ATMEL Corporation

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1
Features
Single 2.7V - 3.6V Supply
Serial Peripheral Interface (SPI) Compatible
Page Program Operation
– Single Cycle Reprogram (Erase and Program)
– 1024 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
– Ideal for Code Shadowing Applications
Low Power Dissipation
– 4 mA Active Read Current Typical
– 2 µA CMOS Standby Current Typical
20 MHz Max Clock Frequency
Hardware Data Protection Feature
100% Compatible to AT45DB021 and AT45DB021A
5.0V-tolerant Inputs: SI, SCK, CS, RESET and WP Pins
Commercial and Industrial Temperature Ranges
Description
The AT45DB021B is a 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 2,162,688 bits of memory are organized as 1024 pages of 264 bytes each. In addi-
tion to the main memory, the AT45DB021B also contains two SRAM data buffers
of 264 bytes each. The buffers allow receiving of data while a page in the main mem-
ory is being reprogrammed, as well as reading or writing a continuous data stream.
2-megabit
2.7-volt Only
DataFlash
®
AT45DB021B
Pin Configurations
Pin Name
Function
CS
Chip Select
SCK
Serial Clock
SI
Serial Input
SO
Serial Output
WP
Hardware Page Write
Protect Pin
RESET
Chip Reset
RDY/BUSY
Ready/Busy
CBGA Top View
through Package
A
B
C
123
VCC
WP
RESET
GND
RDY/BSY
SI
SCK
CS
SO
TSOP Top View
Type 1
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
RDY/BUSY
RESET
WP
NC
NC
VCC
GND
NC
NC
NC
CS
SCK
SI
SO
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
GND
NC
NC
CS
SCK
SI
SO
NC
NC
NC
NC
NC
NC
NC
VCC
NC
NC
WP
RESET
RDY/BUSY
NC
NC
NC
NC
NC
NC
NC
NC
8-SOIC
1
2
3
4
8
7
6
5
SI
SCK
RESET
CS
SO
GND
VCC
WP
Rev. 1937F–DFLSH–10/02


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