ATMEL AT24C164-10PI-2.7 2-wire serial eeprom Datasheet

Features
• Low Voltage and Standard Voltage Operation
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– 5.0 (VCC = 4.5V to 5.5V)
– 2.7 (VCC = 2.7V to 5.5V)
– 2.5 (VCC = 2.5V to 5.5V)
– 1.8 (VCC = 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
– ESD Protection: >3,000V
Automotive Grade and Extended Temperature Devices Available
8-Pin JEDEC SOIC and 8-Pin PDIP Packages
2-Wire Serial
EEPROM
16K (2048 x 8)
AT24C164
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-pin PDIP and 8-pin SOIC packages and is accessed via a 2-wire serial interface. In addition, this device is available in 5.0V (4.5V to 5.5V), 2.7V (2.7V to 5.5V),
2.5V (2.5V to 5.5V) and 1.8V (1.8V to 5.5V) versions.
Pin Configurations
Pin Name
Function
A0 to A2
Address Inputs
SDA
Serial Data
SCL
Serial Clock Input
WP
Write Protect
2-Wire, 16K
Serial EEPROM
8-Pin PDIP
A0
A1
A2
GND
1
2
3
4
8
7
6
5
8-Pin SOIC
VCC
WP
SCL
SDA
A0
A1
A2
GND
1
2
3
4
8
7
6
5
VCC
WP
SCL
SDA
Rev. 0105D–07/98
1
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 .....................................-1.0V to +7.0V
Maximum Operating Voltage........................................... 6.25V
*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.
DC Output Current........................................................ 5.0 mA
Block Diagram
WP
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 VDD or VSS. These inputs allow the selection for
2
AT24C164
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 VSS. Device addressing is discussed
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.
AT24C164
Pin Capacitance(1)
Applicable over recommended operating range from TA = 25°C, f = 1.0 MHz, VCC = +1.8V.
Symbol
Test Condition
CI/O
CIN
Note:
Max
Units
Conditions
Input/Output Capacitance (SDA)
8
pF
VI/O = 0V
Input Capacitance (A0, A1, A2, SCL)
6
pF
VIN = 0V
1. This parameter is characterized and is not 100% tested.
DC Characteristics
Applicable over recommended operating range from: TAI = -40°C to +85°C, VCC = +1.8V to +5.5V, TAC = 0°C to +70°C,
VCC = +1.8V to +5.5V (unless otherwise noted).
Symbol
Parameter
VCC1
Supply Voltage
VCC2
Max
Units
1.8
5.5
V
Supply Voltage
2.5
5.5
V
VCC3
Supply Voltage
2.7
5.5
V
VCC4
Supply Voltage
4.5
5.5
V
ICC
Standby Current VCC = 5.0V
READ at 100 KHz
0.4
1.0
mA
ICC
Standby Current VCC = 5.0V
WRITE at 100 KHz
2.0
3.0
mA
ISB1
Standby Current VCC = 1.8V
VIN = VCC or VSS
0.6
3.0
µA
ISB2
Standby Current VCC = 2.5V
VIN = VCC or VSS
1.4
4.0
µA
ISB3
Standby Current VCC = 2.7V
VIN = VCC or VSS
1.6
4.0
µA
ISB4
Standby Current VCC = 5.0V
VIN = VCC or VSS
8.0
18.0
µA
ILI
Input Leakage Current
VIN = VCC or VSS
0.10
3.0
µA
ILO
Output Leakage Current
VOUT = VCC or VSS
0.05
3.0
µA
VIL
Input Low Level(1)
-0.6
VCC x 0.3
V
VIH
Input High Level(1)
VCC x 0.7
VCC + 0.5
V
VOL2
Output Low Level VCC = 3.0V
IOL = 2.1 mA
0.4
V
VOL1
Output Low Level VCC = 1.8V
IOL = 0.15 mA
0.2
V
Note:
Test Condition
Min
Typ
1. VIL min and VIH max are reference only and are not tested.
3
AC Characteristics
Applicable over recommended operating range from TA = -40°C to +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
Symbol
Parameter
fSCL
Clock Frequency, SCL
tLOW
Clock Pulse Width Low
tHIGH
Clock Pulse Width High
Min
Max
5.0-volt
Min
100
Max
Units
400
KHz
4.7
1.2
µs
4.0
0.6
µs
(1)
tI
Noise Suppression Time
tAA
Clock Low to Data Out Valid
0.1
tBUF
Time the bus must be free before a new
transmission can start(1)
4.7
1.2
µs
tHD.STA
Start Hold Time
4.0
0.6
µs
tSU.STA
Start Set-up Time
4.7
0.6
µs
tHD.DAT
Data In Hold Time
0
0
µs
tSU.DAT
Data In Set-up Time
200
100
ns
tR
Inputs Rise Time(1)
1.0
0.3
µs
tF
Inputs Fall Time(1)
300
300
ns
tSU.STO
Stop Set-up Time
4.7
0.6
µs
tDH
Data Out Hold Time
100
50
ns
tWR
Write Cycle Time
Endurance(1)
5.0V, 25°C, Page Mode
Notes:
100
4.5
0.1
10
1M
50
ns
0.9
µs
10
1M
ms
Write
cycles
1. This parameter is characterized and is not 100% tested.
Device Operation
CLOCK and DATA TRANSITIONS: The SDA pin is normally pulled high with an external device. Data on the SDA
pin may change only during SCL low time periods (refer to
Data Validity timing diagram). Data changes during SCL
high periods will indicate a start or stop condition as
defined below.
START CONDITION: A high-to-low transition of SDA with
SCL high is a start condition which must precede any other
command (refer to Start and Stop Definition timing diagram).
STOP CONDITION: A low-to-high transition of SDA with
SCL high is a stop condition. After a read sequence, the
stop command will place the EEPROM in a standby power
mode (refer to Start and Stop Definition timing diagram).
4
AT24C164
ACKNOWLEDGE: All addresses and data words are serially transmitted to and from the EEPROM in 8-bit words.
The EEPROM sends a zero to acknowledge that it has
received each word. This happens during the ninth clock
cycle.
STANDBY MODE: The AT24C164 features a low power
standby mode which is enabled: a) upon power-up and b)
after the receipt of the STOP bit and the completion of any
internal operations.
MEMORY RESET: After an interruption in protocol, power
loss or system reset, the AT24C164 can be reset by following these steps:
(a) Clock up to 9 cycles, (b) look for SDA high in each cycle
while SCL is high and then (c) create a start condition as
SDA is high.
AT24C164
Bus Timing
SCL: Serial Clock, SDA: Serial Data I/O
Write Cycle Timing
SCL: Serial Clock, SDA: Serial Data I/O
(1)
Note:
1.
The write cycle time tWR is the time from a valid stop condition of a write sequence to the end of the internal clear/write
cycle.
5
Data Validity
Start and Stop Definition
Output Acknowledge
6
AT24C164
AT24C164
Device Addressing
The AT24C164 requires an 8-bit device address word following a start condition to enable the chip for read or write
operations (refer to Figure 1). The most significant bit must
be a one followed by the A2, A1 and A0 device select bits
(the A1 bit must be the compliment of the A1 input pin signal). The next 3 bits are used for memory block addressing
and select one of the eight 256 x 8 memory blocks. These
bits should be considered the three most significant bits of
the data word address. The eighth bit of the device address
is the read/write select bit. A read operation is selected if
this bit is high or a write operation is selected if this bit is
low.
Upon a compare of the device address, the EEPROM will
output a zero. If a compare is not made, the chip will return
to a standby state.
Write Operations
BYTE WRITE: A write operation requires an 8-bit data
word address following the device address word and
acknowledgment. Upon receipt of this address, the
EEPROM will again respond with a zero and then clock in
the first 8-bit data word. Following receipt of the 8-bit data
word, the EEPROM will output a zero and the addressing
device, such as a microcontroller, must terminate the write
sequence with a stop condition. At this time the EEPROM
enters an internally-timed write cycle, tWR, to the nonvolatile
memory. All inputs are disabled during this write cycle and
the EEPROM will not respond until the write is complete
(refer to Figure 2).
PAGE WRITE: The AT24C164 is capable of a 16-byte
page write. A page write is initiated the same as a byte
write, but the microcontroller does not send a stop condition after the first data word is clocked in. Instead, after the
EEPROM acknowledges receipt of the first data word, the
microcontroller can transmit up to fifteen more data words.
The EEPROM will respond with a zero after each data
word received. The microcontroller must terminate the
page write sequence with a stop condition (refer to Figure
3).
The data word address lower 4 bits are internally incremented following the receipt of each data word. The higher
data word address bits are not incremented retaining the
memory page row location. When the word address, internally generated, reaches the page boundary, the following
byte is placed at the beginning of the same page. If more
than sixteen data words are transmitted to the EEPROM,
the data word address will “roll over” and previous data will
be overwritten.
ACKNOWLEDGE POLLING: Once the internally-timed
write cycle has started and the EEPROM inputs are disabled, acknowledge polling can be initiated. This involves
sending a start condition followed by the device address
word. The read/write bit is representative of the operation
desired. Only if the internal write cycle has completed will
the EEPROM respond with a zero allowing the read or
write sequence to continue.
Read Operations
Read operations are initiated the same way as write operations with the exception that the read/write select bit in the
device address word is set to one. There are three read
operations: current address read, random address read
and sequential read.
CURRENT ADDRESS READ: The internal data word
address counter maintains the last address accessed during the last read or write operation, incremented by one.
This address stays valid between operations as long as the
chip power is maintained. The address “roll over” during
read is from the last byte of the last memory page to the
first byte of the first page. The address “roll over” during
write is from the last byte of the current page to first byte of
the same page.
Once the device address with the read/write select bit set
to one is clocked in and acknowledged by the EEPROM,
the current address data word is serially clocked out. The
microcontroller does not respond with an input zero but
does generate a following stop condition (refer to Figure 4).
RANDOM READ: A random read requires a “dummy” byte
write sequence to load in the data word address. Once the
device address word and data word address are clocked in
and acknowledged by the EEPROM, the microcontroller
must generate another start condition. The microcontroller
now initiates a current address read by sending a device
address with the read/write select bit high. The EEPROM
acknowledges the device address and serially clocks out
the data word. The microcontroller does not respond with a
zero but does generate a following stop condition (refer to
Figure 5).
SEQUENTIAL READ: Sequential reads are initiated by
either a current address read or a random address read.
After the microcontroller receives a data word, it responds
with an acknowledge. As long as the EEPROM receives an
acknowledge, it will continue to increment the data word
address and serially clock out sequential data words. When
the memory address limit is reached, the data word
address will “roll over” and the sequential read will continue. The sequential read operation is terminated when
the microcontroller does not respond with a zero but does
generate a following stop condition (refer to Figure 6).
7
Figure 1. Device Address
Figure 2. Byte Write
Figure 3. Page Write
Figure 4. Current Address Read
Figure 5. Random Read
8
AT24C164
AT24C164
Figure 6. Sequential Read
9
Ordering Information
tWR (max)
(ms)
ICC (max)
(µA)
ISB (max)
(µA)
fMAX
(KHz)
10
3000
18
3000
10
10
10
Ordering Code
Package
400
AT24C164-10PC
AT24C164-10SC
8P3
8S1
Commercial
(0°C to 70°C)
18
400
AT24C164-10PI
AT24C164-10SI
8P3
8S1
Industrial
(-40°C to 85°C)
1500
4
100
AT24C164-10PC-2.7
AT24C164-10SC-2.7
8P3
8S1
Commercial
(0°C to 70°C)
1500
4
100
AT24C164-10PI-2.7
AT24C164-10SI-2.7
8P3
8S1
Industrial
(-40°C to 85°C)
1000
4
100
AT24C164-10PC-2.5
AT24C164-10SC-2.5
8P3
8S1
Commercial
(0°C to 70°C)
1000
4
100
AT24C164-10PI-2.5
AT24C164-10SI-2.5
8P3
8S1
Industrial
(-40°C to 85°C)
800
4
100
AT24C164-10PC-1.8
AT24C164-10SC-1.8
8P3
8S1
Commercial
(0°C to 70°C)
800
4
100
AT24C164-10PI-1.8
AT24C164-10SI-1.8
8P3
8S1
Industrial
(-40°C to 85°C)
Package Type
8P3
8 Lead, 0.300" Wide, Plastic Dual Inline Package (PDIP)
8S1
8 Lead, 0.150" Wide, Plastic Gull Wing Small Outline Package (JEDEC SOIC)
Options
Blank
Standard Operation (4.5V to 5.5V)
-2.7
Low-Voltage (2.7V to 5.5V)
-2.5
Low-Voltage (2.5V to 5.5V)
-1.8
Low-Voltage (1.8V to 5.5V)
10
AT24C164
Operation Range
AT24C164
Packaging Information
8P3, 8-Lead, 0.300” Wide, Plastic Dual Inline
Package (PDIP)
Dimensions in Inches and (Millimeters)
8S1, 8-Lead, 0.150” Wide, Plastic Gull Wing Small
Outline (JEDEC SOIC)
Dimensions in Inches and (Millimeters)
JEDEC STANDARD MS-001 BA
.400 (10.16)
.355 (9.02)
.020 (.508)
.013 (.330)
PIN
1
.280 (7.11)
.240 (6.10)
.300 (7.62) REF
.210 (5.33) MAX
.037 (.940)
.027 (.690)
.244 (6.20)
.228 (5.79)
.050 (1.27) BSC
.100 (2.54) BSC
.196 (4.98)
.189 (4.80)
SEATING
PLANE
.068 (1.73)
.053 (1.35)
.015 (.380) MIN
.150 (3.81)
.115 (2.92)
.070 (1.78)
.045 (1.14)
.022 (.559)
.014 (.356)
.010 (.254)
.004 (.102)
.325 (8.26)
.300 (7.62)
.012 (.305)
.008 (.203)
.157 (3.99)
.150 (3.81)
PIN 1
0
REF
15
.430 (10.9) MAX
0
REF
8
.010 (.254)
.007 (.203)
.050 (1.27)
.016 (.406)
11
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