AT24C01C and AT24C02C
I
2
C-Compatible (2-wire) Serial EEPROM
1-Kbit (128 x 8), 2-Kbit (256 x 8)
DATASHEET
Features
Low-voltage Operation
̶
V
CC
= 1.7V to 5.5V
Internally Organized as 128 x 8 (1K) or 256 x 8 (2K)
I
2
C Compatible (2-wire) Serial Interface
Schmitt Trigger, Filtered Inputs for Noise Suppression
Bidirectional Data Transfer Protocol
400kHz (1.7V) and 1MHz (2.5V, 2.7V, 5.0V) Compatibility
Write Protect Pin for Hardware Data Protection
8-byte Page Write Mode
̶
Partial Page Writes Allowed
Self-timed Write Cycle (5ms max)
High-reliability
̶
̶
Endurance: 1,000,000 Write Cycles
Data Retention: 100 Years
̶
8-lead PDIP, 8-lead JEDEC SOIC, 8-lead TSSOP, 8-pad UDFN, 5-lead
SOT23, and 8-ball VFBGA
Green Package Options (Pb/Halide-free/RoHS-compliant)
Die Sale Options: Wafer Form and Tape and Reel Available
Description
The Atmel
®
AT24C01C/02C provides 1024/2048-bits of Serial Electrically
Erasable and Programmable Read-Only Memory (EEPROM) organized as
128/256 words of eight bits each. Both devices include a cascading feature that
allows up to eight devices to share a common 2-wire bus. These devices are
optimized for use in many industrial and commercial applications where low
power and low voltage operation are essential. The AT24C01C/02C are available
in space saving 8-lead PDIP, 8-lead JEDEC SOIC, 8-lead TSSOP, 8-lead UDFN
,
5-lead SOT23, and 8-ball VFBGA packages. In addition, the entire family
operates from 1.7V to 5.5V V
CC
.
Atmel-8700H-SEEPROM-AT24C01C-02C-Datasheet_122016
1.
Pin Configurations and Pinouts
Table 1-1.
Pin
Number
1, 2, 3
Pin Descriptions
Pin
Symbol
A
0
– A
2
Asserted
State
—
Pin
Type
Input
Pin Name and Functional Description
Address Inputs:
The A
2
, A
1
, and A
0
pins are device address inputs that
are hard wired. As many as eight 1-Kbit or 2-Kbit devices may be
addressed on a single bus system.
Ground:
The ground reference for the power supply. GND should be
connected to the system ground.
Serial Data:
The SDA pin is bidirectional for serial data transfer. This pin
is open drain driven and may be wire-ORed with any number of other
open drain or open collector devices.
Serial Clock Input:
The SCL input is used to positive edge clock data
into each EEPROM device and negative edge clock data out of each
device.
Write Protect:
Provides hardware data protection. The Write Protect pin
allows normal read/write operations when connected to Ground (GND).
When the Write Protect pin is connected to V
CC
, the write protection
feature is enabled and operates as shown in
Table 5-1.
Device Power Supply:
The V
CC
pin is used to supply the source voltage
to the device. Operations at invalid V
CC
voltages may produce spurious
results and should not be attempted.
4
GND
—
Power
Input/
Output
5
SDA
—
6
SCL
—
Input
7
WP
Input
8
V
CC
—
Power
Note:
1.
For use of 5-lead SOT23, the software A2, A1, and A0 bits in the device address word must be set to zero to
properly communicate.
8-lead SOIC
A
0
A
1
A
2
GND
1
2
3
4
8
7
6
5
8-lead TSSOP
V
CC
WP
SCL
SDA
A
0
A
1
A
2
GND
1
2
3
4
8
7
6
5
8-pad UDFN
V
CC
WP
SCL
SDA
A
0
1
A
1
2
A
2
3
GND
4
8
7
6
5
V
CC
WP
SCL
SDA
Top View
8-lead PDIP
A
0
A
1
A
2
GND
1
2
3
4
8
7
6
5
Top View
5-lead SOT23
V
CC
WP
SCL
SDA
GND
SDA
2
3
4
Top View
8-ball VFBGA
WP
A
0
A
1
A
2
V
CC
GND
1
2
3
4
8
7
6
5
SCL
1
5
V
CC
WP
SCL
SDA
Top View
Top View
Top View
Note: Package drawings are not to scale.
2
AT24C01C/02C [DATASHEET]
Atmel-8700H-SEEPROM-AT24C01C-02C-Datasheet_122016
2.
Block Diagram
Figure 2-1.
Block Diagram
V
CC
GND
WP
SCL
SDA
Start
Stop
Logic
LOAD
Device
Address
Comparator
A
2
A
1
A
0
R/W
COMP
Serial
Control
Logic
EN
H.V. Pump/Timing
Data Recovery
INC
X DEC
LOAD
Data Word
Addr/counter
EEPROM
Y DEC
Serial MUX
D
IN
D
OUT
D
OUT
/ACK
Logic
3.
Absolute Maximum Ratings
Operating Temperature . . . . . . . . . . .-55C to +125C
Storage Temperature . . . . . . . . . . . . .-65C to +150C
Voltage on any pin
with respect to ground . . . . . . . . . . . . . -1.0V to +7.0V
Maximum Operating Voltage . . . . . . . . . . . . . . . 6.25V
DC Output Current . . . . . . . . . . . . . . . . . . . . . . .5.0mA
*Notice: Stresses beyond those listed under “Absolute
Maximum Ratings” may cause permanent
damage to the device. This is a stress rating
only and functional operation of the device at
these or any other conditions beyond those
indicated in the operational sections of this
specification is not implied. Exposure to
absolute maximum rating conditions for
extended periods may affect device reliability.
AT24C01C/02C [DATASHEET]
Atmel-8700H-SEEPROM-AT24C01C-02C-Datasheet_122016
3
4.
Memory Organization
AT24C01C, 1K Serial EEPROM:
Internally organized with 16 pages of eight bytes each, the 1K requires a 7-bit
data word address for random word addressing.
AT24C02C, 2K Serial EEPROM:
Internally organized with 32 pages of eight bytes each, the 2K requires an
8-bit data word address for random word addressing.
4.1
Pin Capacitance
Table 4-1.
Pin Capacitance
(1)
Applicable over recommended operating range from T
A
= 25C, f = 1.0MHz, V
CC
= 1.7V to 5.5V.
Symbol
C
I/O
C
IN
Note:
1.
Test Condition
Input/Output Capacitance (SDA)
Input Capacitance (A
0
, A
1
, A
2
, SCL)
This parameter is characterized and is not 100% tested.
Max
8
6
Units
pF
pF
Conditions
V
I/O
= 0V
V
IN
= 0V
4.2
DC Characteristics
Table 4-2.
DC Characteristics
Applicable over recommended operating range from: T
AI
= -40°C to +85°C, V
CC
= 1.7V to 5.5V (unless otherwise noted).
Symbol
V
CC1
V
CC2
V
CC3
I
CC1
I
CC2
I
SB1
I
SB2
I
SB3
I
LI
I
LO
V
IL
V
IH
V
OL1
V
OL2
Note:
1.
Parameter
Supply Voltage
Supply Voltage
Supply Voltage
Supply Current V
CC
= 5.0V
Supply Current V
CC
= 5.0V
Standby Current V
CC
= 1.7V
Standby Current V
CC
= 2.5V
Standby Current V
CC
= 5.5V
Input Leakage Current
Output Leakage Current
Input Low Level
(1)
Input High Level
(1)
Output Low Level V
CC
= 1.7V
Output Low Level V
CC
= 3.0V
I
OL
= 0.15mA
I
OL
= 2.1mA
Read at 400kHz
Write at 400kHz
V
IN
= V
CC
or V
SS
V
IN
= V
CC
or V
SS
V
IN
= V
CC
or V
SS
V
IN
= V
CC
or V
SS
V
OUT
= V
CC
or V
SS
-0.6
V
CC
x 0.7
0.10
0.05
Test Condition
Min
1.7
2.5
4.5
0.4
2.0
Typ
Max
5.5
5.5
5.5
1.0
3.0
1.0
2.0
6.0
3.0
3.0
V
CC
x 0.3
V
CC
+ 0.5
0.2
0.4
Units
V
V
V
mA
mA
μA
μA
μA
μA
μA
V
V
V
V
V
IL
min and V
IH
max are reference only and are not tested.
4
AT24C01C/02C [DATASHEET]
Atmel-8700H-SEEPROM-AT24C01C-02C-Datasheet_122016
4.3
AC Characteristics
Table 4-3.
AC Characteristics
Applicable over recommended operating range from T
AI
= -40C to +85C, V
CC
= 1.7V to 5.5V, CL = 1TTL Gate and 100pF
(unless otherwise noted). Test conditions are listed in
Note 2.
1.7V
Symbol
f
SCL
t
LOW
t
HIGH
t
I
t
AA
t
BUF
t
HD.STA
t
SU.STA
t
HD.DAT
t
SU.DAT
t
R
t
F
t
SU.STO
t
DH
t
WR
Endurance
(1)
Note:
1.
2.
Parameter
Clock Frequency, SCL
Clock Pulse Width Low
Clock Pulse Width High
Noise Suppression Time
Clock Low to Data Out Valid
Time the bus must be free before a
new transmission can start.
Start Hold Time
Start Setup Time
Data In Hold Time
Data In Setup Time
Inputs Rise Time
(1)
Inputs Fall Time
(1)
Stop Setup Time
Data Out Hold Time
Write Cycle Time
3.3V, +25C, Page Mode
0.6
50
5
1,000,000
0.1
1.2
0.6
0.6
0
100
0.3
300
.25
50
5
1.2
0.6
100
0.9
0.05
0.5
0.25
0.25
0
100
0.3
100
Min
Max
400
0.4
0.4
50
0.55
2.5V, 5.0V
Min
Max
1000
Units
kHz
μs
μs
ns
μs
μs
μs
μs
μs
ns
μs
ns
μs
ns
ms
Write Cycles
This parameter is ensured by characterization only.
AC measurement conditions:
R
L
(connects to V
CC
): 1.3 k (2.5V, 5V), 10 k (1.7V)
Input pulse voltages: 0.3 V
CC
to 0.7 V
CC
Input rise and fall times:
50ns
Input and output timing reference voltages: 0.5 V
CC
AT24C01C/02C [DATASHEET]
Atmel-8700H-SEEPROM-AT24C01C-02C-Datasheet_122016
5
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