Features
• Serial Peripheral Interface (SPI) Compatible
• Supports SPI Modes 0 (0,0) and 3 (1,1)
• 2.1 MHz Clock Rate
• 128-byte Page Mode Only for Write Operations
• Low-voltage and Standard-voltage Operation
– 2.7 (VCC = 2.7V to 5.5V)
• Block Write Protection
– Protect 1/4, 1/2, or Entire Array
• Write Protect (WP) Pin and Write Disable Instructions for
Both Hardware and Software Data Protection
• Self-Timed Write Cycle (5 ms Typical)
• High Reliability
– Endurance: 100,000 Write Cycles
– Data Retention: >40 Years
• 20-lead JEDEC SOIC and 8-lead Leadless Array Package
SPI Serial
EEPROMs
1M (131,072 x 8)
Description
AT25P1024
The AT25P1024 provides 1,048,576 bits of serial electrically erasable programmable
read only memory (EEPROM) organized as 131,072 words of 8 bits each. The device
is optimized for use in many industrial and commercial applications where low power
and low voltage operation are essential. The AT25P1024 is available in space saving
20-lead JEDEC SOIC and 8-lead LAP packages.
Note:
Not Recommended for new
design; Please refer to
AT25FS010 datasheet.
20-lead SOIC
Table 1. Pin Configurations
CS
SO
1
20
19
18
17
16
15
14
13
12
11
VCC
HOLD
NC
Pin Name
CS
Function
2
Chip Select
NC
3
NC
4
NC
SCK
SI
Serial Data Clock
Serial Data Input
Serial Data Output
Ground
NC
5
NC
NC
6
NC
NC
7
NC
SO
NC
8
NC
WP
GND
9
SCK
SI
GND
VCC
WP
10
Power Supply
Write Protect
Suspends Serial Input
No Connect
8-lead Leadless Array
HOLD
NC
VCC 8
HOLD 7
SCK 6
SI 5
1 CS
2 SO
3 WP
4 GND
Bottom View
The AT25P1024 is enabled through the Chip Select pin (CS) and accessed via a 3-
wire interface consisting of Serial Data Input (SI), Serial Data Output (SO), and Serial
Clock (SCK). All programming cycles are completely self-timed, and no separate
erase cycle is required before write.
1082I–SEEPR–7/06
1