AT24HC04B
I
2
C-Compatible (2-Wire) Serial EEPROM
4K (512 x 8)
DATASHEET
Features
Write Protect Pin for Hardware Data Protection
̶
̶
Utilizes Different Array Protection Compared to the AT24C04B
1.8V (V
CC
= 1.8V to 5.5V)
Low-voltage and Standard-voltage Operation
Internally Organized 512 x 8 (4K)
2-Wire Serial Interface
Schmitt Trigger, Filtered Inputs for Noise Suppression
Bidirectional Data Transfer Protocol
1MHz (5V) and 400kHz (1.8V, 2.5V, 2.7V) Clock Rate
16-byte Page
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, and 8-lead TSSOP Packages
Die Sales: Wafer Form, Tape and Reel, and Bumped Wafers
Description
The Atmel
®
AT24HC04B provides 4,096 bits of Serial Electrically Erasable and
Programmable Read-Only Memory (EEPROM) organized as 512 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
AT24HC04B is available in space-saving 8-lead PDIP, 8-lead JEDEC SOIC, and
8-lead TSSOP packages and is accessed via a 2-wire serial interface. In addition,
the entire family is available in 1.8V (1.8V to 5.5V) version.
Atmel-5227H-SEEPROM-AT24HC04B-Datasheet_122015
1.
Pin Configurations and Pinouts
Table 1-1.
Pin Name
NC
A1 and A2
SDA
SCL
WP
V
CC
Pin Configuration
Function
No Connect
Address Inputs
Serial Data
Serial Clock Input
Top View
NC
A1
A2
GND
8-lead PDIP
1
2
3
4
8
7
6
5
8-lead SOIC
V
CC
WP
SCL
SDA
NC
A1
A2
GND
1
8
V
CC
WP
SCL
SDA
2
7
3
6
4
5
Top View
Write Protect
Device Power Supply
NC
A1
A2
GND
8-lead TSSOP
1
2
3
4
8
7
6
5
V
CC
WP
SCL
SDA
Top View
Note:
Drawings are not to scale.
2.
Absolute Maximum Ratings*
Operating Temperature . . . . . . . . . . .-40C 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 . . . . . . . . . . . . . . . . . . . . . . 5.0 mA
*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.
2
AT24HC04B [DATASHEET]
Atmel-5227H-SEEPROM-AT24HC04B-Datasheet_122015
3.
Block Diagram
Figure 3-1.
Block Diagram
VCC
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
EEPROM
LOAD
DATA WORD
ADDR/COUNTER
Y DEC
SERIAL MUX
D
IN
D
OUT
D
OUT
/ACK
LOGIC
4.
Pin Description
Serial Clock (SCL):
The SCL input is used to positive edge clock data into each EEPROM device and negative
edge clock data out of each device.
Serial Data (SDA):
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.
Device/Page Addresses (A2, A1, and A0):
The A2 and A1 pins are device address inputs that must be
hardwired for the AT24HC04B. As many as four 4K devices may be addressed on a single bus system. The
A0 pin is a no connect. (Device addressing and Page addressing are discussed in detail in
Section 7., “Device
Addressing and Page Addressing”).
Write Protect (WP):
The AT24HC04B has a WP pin which provides hardware data protection. The WP pin
allows normal read/write operations when connected to ground (GND). When the WP pin is connected to V
CC
,
the write protection feature is enabled and operates as shown.
Table 4-1.
Write Protect
Part of the Array Protected
Upper Half (2K) Array
Normal Read/Write Operations
WP Pin Status
At V
CC
At GND
AT24HC04B [DATASHEET]
Atmel-5227H-SEEPROM-AT24HC04B-Datasheet_122015
3
5.
Memory Organization
AT24HC04B, 4K Serial EEPROM:
The 4K is internally organized with 32 pages of 16 bytes each. Random
word addressing requires an 9-bit data word address.
5.1
Pin Capacitance
(1)
Applicable over recommended operating range from T
AI
= 25C, f = 1.0MHz, V
CC
= +1.8V.
Symbol
C
I/O
C
IN
Note:
1.
Test Condition
Input/Output Capacitance (SDA)
Input Capacitance (A
0
, A
1
, A
2
, and SCL)
This parameter is characterized and is not 100% tested.
Max
8
6
Units
pF
pF
Conditions
V
I/O
= 0V
V
IN
= 0V
5.2
DC Characteristics
Applicable over recommended operating range from: T
AI
= -40C to +85C, V
CC
= +1.8V to +5.5V (unless otherwise noted).
Symbol
V
CC1
V
CC2
V
CC3
V
CC4
I
CC
I
CC
I
SB1
I
SB2
I
SB3
I
SB4
I
LI
I
LO
V
IL
V
IH
V
OL2
V
OL1
Note:
1.
Parameter
Supply Voltage
Supply Voltage
Supply Voltage
Supply Voltage
Supply Current V
CC
= 5.0V
Supply Current V
CC
= 5.0V
Standby Current V
CC
= 1.8V
Standby Current V
CC
= 2.5V
Standby Current V
CC
= 2.7V
Standby Current V
CC
= 5.0V
Input Leakage Current
Output Leakage Current
Input Low Level
(1)
Input High Level
(1)
Output Low Level V
CC
= 3.0V
Output Low Level V
CC
= 1.8V
I
OL
= 2.10mA
I
OL
= 0.15mA
Read at 100kHz
Write at 100kHz
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
IN
= V
CC
or V
SS
V
OUT
= V
CC
or V
SS
0.60
V
CC
x 0.70
Test Condition
Min
1.80
2.50
2.70
4.50
0.40
2
0.60
1.40
1.60
8
0.10
0.05
Typ
Max
5.50
5.50
5.50
5.50
1
3
3
4
4
18
3
3
V
CC
x 0.30
V
CC
+ 0.50
0.40
0.20
Units
V
V
V
V
mA
mA
μA
μA
μA
μA
μA
μA
V
V
V
V
V
IL
min and V
IH
max are reference only and are not tested.
4
AT24HC04B [DATASHEET]
Atmel-5227H-SEEPROM-AT24HC04B-Datasheet_122015
Table 5-1.
AC Characteristics
Applicable over recommended operating range from T
AI
= –40C to +85C, V
CC
= +5.5V, CL = 1 TTL Gate and 100pF (unless
otherwise noted). Test conditions are listed in
Note 2.
1.8V, 2.5V, 2.7V
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)
Notes:
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
5.0V, 25C, Byte Mode
0.60
50
5
1,000,000
0.10
1.20
0.60
0.60
0
100
0.30
300
.25
50
5
1.20
0.60
50
0.90
0.05
0.50
0.25
0.25
0
100
0.30
100
Min
Max
400
0.40
0.40
40
0.55
Min
5V
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:
RL (connects to V
CC
): 1.3k (2.5V, 5.5V), 10k (1.7V)
Input pulse voltages: 0.3V
CC
to 0.7V
CC
Input rise and fall times:
50ns
Input and output timing reference voltages: 0.5 x V
CC
AT24HC04B [DATASHEET]
Atmel-5227H-SEEPROM-AT24HC04B-Datasheet_122015
5
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