Features
• 100% Compatible to AT45D041
• Single 4.5V - 5.5V Supply
• Serial Interface Architecture
• Page Program Operation
– Single Cycle Reprogram (Erase and Program)
– 2048 Pages (264 Bytes/Page) Main Memory
• Optional 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
• Internal Program and Control Timer
• Low Power Dissipation
4-megabit
5-volt Only
Serial
– 15 mA Active Read Current Typical
– 10 µA CMOS Standby Current Typical
• 15 MHz Max Clock Frequency
• Hardware Data Protection Feature
DataFlash®
• Serial Peripheral Interface (SPI) Compatible – Modes 0 and 3
• CMOS and TTL Compatible Inputs and Outputs
• Commercial and Industrial Temperature Ranges
AT45D041A
Description
The AT45D041A is a 5-volt only, serial interface Flash memory suitable for in-
system reprogramming. Its 4,325,376 bits of memory are organized as 2048 pages of
264 bytes each. In addition to the main memory, the AT45D041A 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
(continued)
Recommend using
AT45DB041B for new
designs.
Pin Configurations
TSOP Top View
Pin Name
Function
Type 1
CS
Chip Select
Serial Clock
Serial Input
Serial Output
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
SCK
SI
3
NC
4
NC
5
VCC
GND
NC
6
7
SO
8
NC
9
Hardware Page Write
Protect Pin
NC
10
11
12
13
14
WP
CS
SCK
SI
RESET
Chip Reset
Ready/Busy
PLCC
SO
RDY/BUSY
SOIC
GND
NC
NC
CS
SCK
SI
1
28
27
26
25
24
23
22
21
20
19
18
17
16
15
VCC
NC
2
3
NC
SCK
SI
5
6
7
8
9
29 WP
4
WP
28 RESET
27 RDY/BUSY
26 NC
5
RESET
RDY/BUSY
NC
SO
NC
NC
6
SO
NC
NC
NC
NC
NC
NC
NC
7
25 NC
8
NC
NC 10
NC 11
NC 12
NC 13
24 NC
9
NC
23 NC
10
11
12
13
14
NC
NC
22 NC
NC
21 NC
NC
NC
Rev. 1496D–01/01
Note: PLCC package pins 16
and 17 are DON’T CONNECT.
1