Features
Serial Peripheral Interface (SPI) Compatible
Supports SPI Modes 0 (0,0) and 3 (1,1)
Data Sheet Describes Mode 0 Operation
Low-voltage and Standard-voltage Operation
2.7 (V = 2.7V to 5.5V)
CC
1.8 (V = 1.8V to 5.5V)
CC
20 MHz Clock Rate (5V)
8-byte Page Mode
Block Write Protection
Protect 1/4, 1/2, or Entire Array
SPI Serial
Write Protect (WP) Pin and Write Disable Instructions for Both Hardware and Software
Data Protection
EEPROM
Self-timed Write Cycle (5 ms max)
High Reliability
1K (128x8)
Endurance: One Million Write Cycles
Data Retention: 100 Years
2K (256x8)
Automotive Devices Available
8-lead JEDEC PDIP, 8-lead JEDEC SOIC, 8-lead Ultra Thin mini-MAP (MLP 2x3) and 8-
lead TSSOP Packages
4K (512x8)
Die Sales: Wafer Form, Waffle Pack, Bumped Wafers
Description
AT25010A
The AT25010A/020A/040A provides 1024/2048/4096 bits of serial electrically eras-
AT25020A
able programmable read-only memory (EEPROM) organized as 128/256/512 words of
8 bits each. The device is optimized for use in many industrial and commercial appli-
AT25040A
cations where low-power and low-voltage operation are essential. The
AT25010A/020A/040A is available in space saving 8-lead PDIP, 8-lead JEDEC SOIC,
8-lead Ultra Thin mini-MAP (MLP 2x3), and 8-lead TSSOP packages.
The AT25010A/020A/040A is enabled through the Chip Select pin (CS) and accessed
Not
via a three-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
Recommended
separate erase cycle is required before write.
Block write protection is enabled by programming the status register with one of four
for New Design
blocks of write protection. Separate Program Enable and Program disable instructions
are provided for additional data protection. Hardware data protection is provided via
the WP pin to protect against inadvertent write attempts. The HOLD pin may be used
to suspend any serial communication without resetting the serial sequence.
Table 1. Pin Configuration
8-lead SOIC
8-lead PDIP
Pin Name Function
CS 1 8 VCC
CS 1 8 VC C
CS Chip Select
SO 2 7 HOLD
SO 2 7 HO L
WP 3 6 SCK
WP 3 6 SC K
SCK Serial Data Clock
GND 4 5 SI
GND 4 5 SI
SI Serial Data Input
8-lead Ultra Thin mini-MAP (MLP 2x3) 8-lead TSSOP
SO Serial Data Output
GND Ground
VCC 8 1 CS CS 1 8 VC C
HOLD 7 2 SO SO 2 7 HO L
VCC Power Supply
SCK 6 3 WP WP 3 6 SC K
SI 5 4 GND GND 4 5 SI
WP Write Protect
HOLD Suspends Serial Input
Bottom view
3348JSEEPR8/06Absolute Maximum Ratings*
*NOTICE: Stresses beyond those listed under Absolute
Operating Temperature 40C to + 125C
Maximum Ratings may cause permanent dam-
age to the device. This is a stress rating only and
Storage Temperature 65C to + 150C
functional operation of the device at these or any
Voltage on Any Pin other conditions beyond those indicated in the
with Respect to Ground 1.0V to + 7.0V operational sections of this specification is not
implied. Exposure to absolute maximum rating
Maximum Operating Voltage .......................................... 6.25V
conditions for extended periods may affect
device reliability.
DC Output Current........................................................ 5.0 mA
Figure 1. Block Diagram
MEMORY ARRAY
STATUS ADDRESS
128/256/512 X 8 DECODER
REGISTER
DATA
REGISTER
OUTPUT
BUFFER
MODE
DECODE
LOGIC
CLOCK
GENERATOR
2
AT25010A/020A/040A
3348JSEEPR8/06