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AT45DB021-JC Datasheet(PDF) 1 Page - ATMEL Corporation

Part # AT45DB021-JC
Description  2-Megabit 2.7-volt Only Serial DataFlash
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Manufacturer  ATMEL [ATMEL Corporation]
Direct Link  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

AT45DB021-JC Datasheet(HTML) 1 Page - ATMEL Corporation

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Features
Single 2.7V - 3.6V Supply
Serial Interface Architecture
Page Program Operation
– Single Cycle Reprogram (Erase and Program)
– 1024 Pages (264 Bytes/Page) Main Memory
Two 264-Byte SRAM Data Buffers – Allows Receiving of Data
while Reprogramming of Non-Volatile Memory
Internal Program and Control Timer
Fast Page Program Time – 7 ms Typical
120
µµµµs Typical Page to Buffer Transfer Time
Low Power Dissipation
– 4 mA Active Read Current Typical
–5
µµµµA CMOS Standby Current Typical
5 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
Description
The AT45DB021 is a 2.7-volt only, serial interface Flash memory suitable for in-sys-
tem reprogramming. Its 2,162,688 bits of memory are organized as 1024 pages of
264-bytes each. In addition to the main memory, the AT45DB021 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 memo-
ries that are accessed randomly with multiple address lines and a parallel interface,
the DataFlash uses a serial interface to sequentially access its data. The simple serial
interface facilitates hardware layout, increases system reliability, minimizes switching
2-Megabit
2.7-volt Only
Serial
DataFlash
®
AT45DB021
Rev. 0868B–07/98
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
(continued)
PLCC
5
6
7
8
9
10
11
12
13
29
28
27
26
25
24
23
22
21
SCK
SI
SO
NC
NC
NC
NC
NC
NC
WP
RESET
RDY/BUSY
NC
NC
NC
NC
NC
NC
TSOP Top View
Type 1
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
RDY/BUSY
RESET
WP
NC
NC
NC
VCC
GND
NC
NC
NC
NC
CS
SCK
SI
SO
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
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
Note: PLCC package pins 16
and 17 are DON’T CONNECT.


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