Features
•
Low-voltage and Standard-voltage Operation
─
1.8 (V
CC
= 1.8V to 5.5V)
•
•
•
•
•
•
•
•
•
•
Internally Organized 512 x 8 (4K), or 1024 x 8 (8K)
Two-wire Serial Interface
Schmitt Trigger, Filtered Inputs for Noise Suppression
Bidirectional Data Transfer Protocol
1 MHz (5V), 400 kHz (1.8V, 2.5V, 2.7V) Compatibility
Write Protect Pin for Hardware Data Protection
16-byte Page (4K, 8K) Write Modes
Partial Page Writes Allowed
Self-timed Write Cycle (5 ms max)
High-reliability
─
Endurance: 1 Million Write Cycles
─
Data Retention: 100 Years
•
8-lead PDIP, 8-lead JEDEC SOIC, 8-lead Ultra-Thin Mini-MAP (MLP 2x3), 5-lead
SOT23, 8-lead TSSOP and 8-ball dBGA2 Packages
•
Lead-free/Halogen-free
•
Die Sales: Wafer Form and Tape and Reel
Two-wire
Serial EEPROM
4K (512 x 8)
8K (1024 x 8)
AT24C04B
AT24C08B
Description
The AT24C04B/08B provides 4096/8192 bits of serial electrically erasable and
programmable read-only memory (EEPROM) organized as 512/1024 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 AT24C04B/08B is
available in space-saving 8-lead PDIP, 8-lead JEDEC SOIC, 8-lead Ultra-Thin Mini-
MAP (MLP 2x3), 5-lead SOT23, 8-lead TSSOP, and 8-ball dBGA2 packages and is
accessed via a Two-wire serial interface. In addition, the AT24C04B/08B is available in
1.8V (1.8V to 5.5V) version.
Figure 1. Pin Configurations
Pin Name
Description
8-lead Ultra-Thin
Mini-MAP (MLP 2x3)
V
CC
8
WP
7
SCL
6
SDA
5
1
A0
2
A1
3
A2
4
GND
Not Recommended
for New Design.
Replaced by
AT24C04C or
AT24C08C.
8-ball dBGA2
V
CC
WP
SCL
SDA
8
7
6
5
A0 – A2
SDA
SCL
WP
NC
GND
V
CC
Address Inputs
Serial Data
Serial Clock Input
Write Protect
No Connect
Ground
Power Supply
A0
A1
3
A2
4
GND
1
2
Bottom View
8-lead TSSOP
A0
A1
A2
GND
1
2
3
4
8
7
6
5
Bottom View
8-lead SOIC
V
CC
WP
SCL
SDA
A0
A1
A2
GND
1
2
3
4
8
7
6
5
V
CC
WP
SCL
SDA
Note:
For use of 5-lead SOT23
4K:
The software A2 and A1 bits in the
device address word must be set to zero
to properly communicate.
8K:
The software A2 bit in the device
address word must be set to zero to
properly communicate.
5-lead SOT23
SCL
GND
SDA
1
2
3
4
5
8-lead PDIP
WP
A0
A1
A2
GND
1
2
3
4
8
7
6
5
V
CC
WP
SCL
SDA
V
CC
5226G–SEEPR–11/09
Absolute Maximum Ratings
Operating Temperature ..........................
−55°C
to +125°C
Storage Temperature ...........................
−65°C
to + 150°C
Voltage on Any Pin with
Respect to Ground ..................................
−
0.1V 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 condition 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.
Figure 2.
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
LOAD
DATA WORD
ADDR/COUNTER
X DEC
EEPROM
Y DEC
SERIAL MUX
D
IN
D
OUT
D
OUT
/ACK
LOGIC
2
AT24C04B/08B
5226G–SEEPR–11/09
Two-wire Serial EEPROM
1.
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, A0):
The AT24C04B uses the A2 and A1 inputs for hard wire addressing and a
toal of four 4K devices may be addressed on a single bus system. The A0 pin is a no connect and can be connected to
ground (device addressing is discussed in detail under the Device Addressing section).
The AT24C08B only uses the A2 input for hardware addressing and a total of two 8K devices may be addressed on a
single bus system. The A0 and A1 pins are no connects and can be connected to ground (device addressing is
discussed in detail under the Device Addressing section).
Table 1. Write Protect
WP Pin Status
At V
CC
At GND
Part of the Array Protected
24C04B/08B
Full Array
Normal Read/Write Operations
3
5226G–SEEPR–11/09
2.
Memory Organization
AT24C04B, 4K SERIAL EEPROM:
Internally organized with 32 pages of 16 bytes each, the 4K requires a 9-bit data
word address for random word addressing.
AT24C08B, 8K SERIAL EEPROM:
Internally organized with 64 pages of 16 bytes each, the 8K requires a 10-bit
data word address for random word addressing.
Table 2. Pin Capacitance
(1)
Applicable over recommended operating range from T
A
= 25°C, f = 1.0 MHz, V
CC
= +1.8V
Symbol
C
I/O
C
IN
Test Condition
Input/Output Capacitance (SDA)
Input Capacitance (A
0
, A
1
, A
2
, SCL)
Max
8
6
Units
pF
pF
Conditions
V
I/O
= 0V
V
IN
= 0V
Note:
1.
This parameter is characterized and is not 100% tested.
Table 3. DC Characteristics
Applicable over recommended operating range from:
T
AI
= –40°C to +85°C,
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
Supply Voltage
Supply Voltage
Supply Voltage
Supply Voltage
Supply Current V
CC
= 5.0V
Supply Current V
CC
= 5.0V
Supply Current V
CC
= 1.8V
Supply Current V
CC
= 2.5V
Supply Current V
CC
= 2.7V
Supply 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
= 2.1 mA
I
OL
= 0.15 mA
READ at 100 kHz
WRITE at 100 kHz
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
- 0.6
V
CC
x 0.7
Parameter
Test Condition
Min
1.8
2.5
2.7
4.5
0.4
2.0
0.6
1.4
1.6
8.0
0.10
0.05
Typ
Max
5.5
5.5
5.5
5.5
1.0
3.0
3.0
4.0
4.0
18.0
3.0
3.0
V
CC
x 0.3
V
CC
+ 0.5
0.4
0.2
Units
V
V
V
V
mA
mA
µA
µA
µA
µA
µA
µA
V
V
V
V
Note:
1.
V
IL
min and V
IH
max are reference only and are not tested.
4
AT24C04B/08B
5226G–SEEPR–11/09
Two-wire Serial EEPROM
Table 4. AC Characteristics
Applicable over recommended operating range from T
AI
= –40°C to +85°C, V
CC
= +1.8V to +5.5V,
CL = 1 TTL Gate and 100 pF (unless otherwise noted)
1.8, 2.5, 2.7
Symbol
Parameter
Min
f
SCL
t
LOW
t
HIGH
t
I
t
AA
t
BUF
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, 25°C, Byte Mode
1M
0.6
50
5
1M
0.1
1.2
1.2
0.6
50
0.9
0.05
0.5
Max
400
0.4
0.4
40
0.55
Min
Max
1000
kHz
µs
µs
ns
µs
µs
5.0-volt
Units
t
HD.STA
t
SU.STA
t
HD.DAT
t
SU.DAT
t
R
t
F
T
SU.STO
t
DH
t
WR
Endurancec
(1)
0.6
0.6
0
100
0.3
300
0.25
0.25
0
100
0.3
100
.25
50
5
µs
µs
µs
ns
µs
ns
µs
ns
ms
Write cycles
Note:
1.
This parameter is ensured by characterization only.
5
5226G–SEEPR–11/09
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