AT45DB081 Datasheet, PDF (1/16 Pages) ATMEL Corporation – 8-Megabit 2.7-volt Only Serial DataFlash

AT45DB081
Features
• Single 2.7V - 3.6V Supply
• Serial Interface Architecture
• Page Program Operation
– Single Cycle Reprogram (Erase and Program)
– 4096 Pages (264 Bytes/Page) Main Memory
• Two 264-Byte 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 µs Typical Page to Buffer Transfer Time
• Low Power Dissipation
– 4 mA Active Read Current Typical
– 2 µA CMOS Standby Current Typical
• 10 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 AT45DB081 is a 2.7-volt only, serial interface Flash memory suitable for in-sys-
tem reprogramming. Its 8,650,752 bits of memory are organized as 4096 pages of
264-bytes each. In addition to the main memory, the AT45DB081 also contains two
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 memories 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 facil-
itates hardware layout, increases system reliability, minimizes switching noise, and
Pin Configurations
(continued)
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
TSOP Top View
Type 1
SOIC
GND
1
NC
2
NC
3
CS
4
SCK
5
SI
6
SO
7
NC
8
NC
9
NC
10
NC
11
NC
12
NC
13
NC
14
28
VCC
27
NC
26
NC
25
WP
24
RESET
23
RDY/BUSY
22
NC
21
NC
20
NC
19
NC
18
NC
17
NC
16
NC
15
NC
RDY/BUSY 1
RESET 2
WP 3
NC 4
NC 5
NC 6
VCC 7
GND 8
NC 9
NC 10
NC 11
NC 12
CS 13
SCK 14
SI 15
SO 16
32 NC
31 NC
30 NC
29 NC
28 NC
27 NC
26 NC
25 NC
24 NC
23 NC
22 NC
21 NC
20 NC
19 NC
18 NC
17 NC
8-Megabit
2.7-volt Only
Serial
DataFlash^™
AT45DB081
0870A-A–6/97
1