Rainbow Electronics AT24C164 User Manual
Features
• Low Voltage and Standard Voltage Operation
–2.7(V
–1.8(V
=2.7Vto5.5V)
CC
=1.8Vto5.5V)
CC
• 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
• PartialPageWritesAreAllowed
• 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
Pin Configurations
Pin Name Function
A0 - A2 Address Inputs
SDA Serial Data
SCL Serial Clock Input
WP Write Protect
8-lead PDIP
A0
A1
A2
GND
1
2
3
4
8
7
6
5
VCC
WP
SCL
SDA
A0
A1
A2
GND
8-lead SOIC
1
2
3
4
VCC
8
WP
7
SCL
6
SDA
5
Rev. 0105F–SEEPR–08/0 2
1
Absolute Maximum Ratings*
Operating Temperature .................................. -55°Cto+125°C
Storage Temperature ..................................... -65°Cto+150°C
Voltage on Any Pin
with Respect to Ground .....................................-1.0V to +7.0V
Maximum Operating Voltage .......................................... 6.25V
DC Output Current ........................................................ 5.0 mA
Block Diagram
WP
*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
AT24C164
0105F–SEEPR–08/02
AT24C164
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
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
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.
or VSS. These inputs allow the selection for
DD
. Device addressing is dis-
SS
0105F–SEEPR–08/02
3
Pin Capacitance
(1)
Applicable over recommended operating range from TA=25°C, f = 1.0 MHz, VCC= +1.8V.
Symbol Test Condition Max Units Conditions
C
I/O
C
IN
Input/Output Capacitance (SDA) 8 pF V
I/O
=0V
Input Capacitance (A0,A1,A2,SCL) 6 pF VIN=0V
Note: 1. This parameter is characterized and is not 100% tested.
DC Characteristics
Applicable over recommended operating range from: TAI=-40°Cto+85°C, VCC= +1.8V to +5.5V, TAC=0°Cto+70°C,
V
= +1.8V to +5.5V (unless otherwise noted).
CC
Symbol Parameter Test Condition Min Typ Max Units
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. V
Supply Voltage 1.8 5.5 V
Supply Voltage 2.5 5.5 V
Supply Voltage 2.7 5.5 V
Supply Voltage 4.5 5.5 V
Standby Current VCC= 5.0V READ at 100 kHz 0.4 1.0 mA
Standby Current VCC= 5.0V WRITE at 100 kHz 2.0 3.0 mA
Standby Current VCC=1.8V VIN=VCCor V
Standby Current VCC=2.5V VIN=VCCor V
Standby Current VCC=2.7V VIN=VCCor V
Standby Current VCC=5.0V VIN=VCCor V
Input Leakage Current VIN=VCCor V
Output Leakage Current V
Input Low Level
Input High Level
(1)
(1)
OUT =VCC
or V
SS
SS
SS
SS
SS
SS
-0.6 VCCx0.3 V
VCCx0.7 VCC+0.5 V
0.6 3.0 µA
1.4 4.0 µA
1.6 4.0 µA
8.0 18.0 µA
0.10 3.0 µA
0.05 3.0 µA
Output Low Level VCC=3.0V IOL=2.1mA 0.4 V
Output Low Level VCC=1.8V IOL=0.15mA 0.2 V
min and VIHmax are reference only and are not tested.
IL
4
AT24C164
0105F–SEEPR–08/02
AT24C164
AC Characteristics
Applicable over recommended operating range from TA=-40°Cto+85°C, VCC= +1.8V to +5.5V, CL = 1 TTL Gate and
100 pF (unless otherwise noted).
2.7-, 2.5-, 1.8-volt 5.0-volt
Symbol Parameter
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
Clock Frequency, SCL 100 400 kHz
Clock Pulse Width Low 4.7 1.2 µs
Clock Pulse Width High 4.0 0.6 µs
Noise Suppression Time
Clock Low to Data Out Valid 0.1 4.5 0.1 0.9 µs
Time the bus must be free before a new transmission can
(1)
start
Start Hold Time 4.0 0.6 µs
Start Set-up Time 4.7 0.6 µs
Data In Hold Time 0 0 µs
Data In Set-up Time 200 100 ns
Inputs Rise Time
Inputs Fall Time
Stop Set-up Time 4.7 0.6 µs
Data Out Hold Time 100 50 ns
WriteCycleTime 10 10 ms
(1)
5.0V, 25°C, Page Mode 1M 1M
UnitsMin Max Min Max
(1)
100 50 ns
4.7 1.2 µs
(1)
(1)
1.0 0.3 µs
300 300 ns
Write
cycles
Note: 1. This parameter is characterized and is not 100% tested.
0105F–SEEPR–08/02
5
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