1
Features
Low Voltage and Standard Voltage Operation
2.7 (V
CC
= 2.7V to 5.5V)
1.8 (V
CC
= 1.8V to 5.5V)
Internally Organized 2048 x 8 (16K)
2-Wire Serial Interface
Schmitt Trigger, Filtered Inputs for Noise Suppression
Bidirectional Data Transfer Protocol
100 kHz (1.8V, 2.5V, 2.7V) and 400 kHz (5V) Compatibility
Write Protect Pin for Hardware Data Protection
Cascadable Feature Allows for Extended Densities
16-Byte Page Write Mode
Partial Page Writes Are Allowed
Self-Timed Write Cycle (10 ms max)
High Reliability
Endurance: 1 Million Write Cycles
Data Retention: 100 Years
Automotive Grade and Extended Temperature Devices Available
8-lead PDIP and 8-lead JEDEC SOIC Packages
Description
The AT24C164 provides 16,384 bits of serial electrically erasable and programmable
read only memory (EEPROM) organized as 2048 words of 8 bits each. The device's
cascadable feature allows up to eight devices to share a common 2-wire bus. The
device is optimized for use in many industrial and commercial applications where low
power and low voltage operation are essential. The AT24C164 is available in space
saving 8-lead PDIP and 8-lead JEDEC SOIC packages and is accessed via a 2-wire
serial interface. In addition, this device is available in 2.7V (2.7V to 5.5V) and 1.8V
(1.8V to 5.5V) versions.
2-Wire Serial
EEPROM
16K (2048 x 8)
AT24C164
Rev. 0105FSEEPR08/02
Pin Configurations
Pin Name
Function
A0 - A2
Address Inputs
SDA
Serial Data
SCL
Serial Clock Input
WP
Write Protect
8-lead PDIP
1
2
3
4
8
7
6
5
A0
A1
A2
GND
VCC
WP
SCL
SDA
8-lead SOIC
1
2
3
4
8
7
6
5
A0
A1
A2
GND
VCC
WP
SCL
SDA
2
AT24C164
0105FSEEPR08/02
Block Diagram
Absolute Maximum Ratings*
Operating Temperature .................................. -55
C to +125C
*NOTICE:
Stresses beyond those listed under "Absolute
Maximum Ratings" may cause permanent dam-
age 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.
Storage Temperature ..................................... -65
C 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
WP
3
AT24C164
0105FSEEPR08/02
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 SELECT (A2, A1, A0): The A2, A1 and A0 pins are device address inputs that
may be hardwired or actively driven to V
DD
or V
SS
. These inputs allow the selection for
one of eight possible devices sharing a common bus. The AT24C164 can be made
compatible with the AT24C16 by tying A2, A1 and A0 to V
SS
. Device addressing is dis-
cussed in detail in the device addressing section.
WRITE PROTECT (WP): The write protect input, when tied low to GND, allows normal
write operations.
Memory Organization
The AT24C164 is internally organized with 256 pages of 8 bytes each. Random word
addressing requires an 11 bit data word address.
4
AT24C164
0105FSEEPR08/02
Note:
1. This parameter is characterized and is not 100% tested.
Note:
1. V
IL
min and V
IH
max are reference only and are not tested.
Pin Capacitance
(1)
Applicable over recommended operating range from T
A
= 25
C, f = 1.0 MHz, V
CC
= +1.8V.
Symbol
Test Condition
Max
Units
Conditions
C
I/O
Input/Output Capacitance (SDA)
8
pF
V
I/O
= 0V
C
IN
Input Capacitance (A
0
, A
1
, A
2
, SCL)
6
pF
V
IN
= 0V
DC Characteristics
Applicable over recommended operating range from: T
AI
= -40
C to +85C, V
CC
= +1.8V to +5.5V, T
AC
= 0
C to +70C,
V
CC
= +1.8V to +5.5V (unless otherwise noted).
Symbol
Parameter
Test Condition
Min
Typ
Max
Units
V
CC1
Supply Voltage
1.8
5.5
V
V
CC2
Supply Voltage
2.5
5.5
V
V
CC3
Supply Voltage
2.7
5.5
V
V
CC4
Supply Voltage
4.5
5.5
V
I
CC
Standby Current V
CC
= 5.0V
READ at 100 kHz
0.4
1.0
mA
I
CC
Standby Current V
CC
= 5.0V
WRITE at 100 kHz
2.0
3.0
mA
I
SB1
Standby Current V
CC
= 1.8V
V
IN
= V
CC
or V
SS
0.6
3.0
A
I
SB2
Standby Current V
CC
= 2.5V
V
IN
= V
CC
or V
SS
1.4
4.0
A
I
SB3
Standby Current V
CC
= 2.7V
V
IN
= V
CC
or V
SS
1.6
4.0
A
I
SB4
Standby Current V
CC
= 5.0V
V
IN
= V
CC
or V
SS
8.0
18.0
A
I
LI
Input Leakage Current
V
IN
= V
CC
or V
SS
0.10
3.0
A
I
LO
Output Leakage Current
V
OUT =
V
CC
or V
SS
0.05
3.0
A
V
IL
Input Low Level
(1)
-0.6
V
CC
x 0.3
V
V
IH
Input High Level
(1)
V
CC
x 0.7
V
CC
+ 0.5
V
V
OL2
Output Low Level V
CC
= 3.0V
I
OL
= 2.1 mA
0.4
V
V
OL1
Output Low Level V
CC
= 1.8V
I
OL
= 0.15 mA
0.2
V
5
AT24C164
0105FSEEPR08/02
Note:
1. This parameter is characterized and is not 100% tested.
AC Characteristics
Applicable over recommended operating range from T
A
= -40
C to +85C, V
CC
= +1.8V to +5.5V, CL = 1 TTL Gate and
100 pF (unless otherwise noted).
Symbol
Parameter
2.7-, 2.5-, 1.8-volt
5.0-volt
Units
Min
Max
Min
Max
f
SCL
Clock Frequency, SCL
100
400
kHz
t
LOW
Clock Pulse Width Low
4.7
1.2
s
t
HIGH
Clock Pulse Width High
4.0
0.6
s
t
I
Noise Suppression Time
(1)
100
50
ns
t
AA
Clock Low to Data Out Valid
0.1
4.5
0.1
0.9
s
t
BUF
Time the bus must be free before a new transmission can
start
(1)
4.7
1.2
s
t
HD.STA
Start Hold Time
4.0
0.6
s
t
SU.STA
Start Set-up Time
4.7
0.6
s
t
HD.DAT
Data In Hold Time
0
0
s
t
SU.DAT
Data In Set-up Time
200
100
ns
t
R
Inputs Rise Time
(1)
1.0
0.3
s
t
F
Inputs Fall Time
(1)
300
300
ns
t
SU.STO
Stop Set-up Time
4.7
0.6
s
t
DH
Data Out Hold Time
100
50
ns
t
WR
Write Cycle Time
10
10
ms
Endurance
(1)
5.0V, 25
C, Page Mode
1M
1M
Write
cycles
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