ATMEL AT24C01A Schmitt trigger, filtered inputs for noise suppression Datasheet

Features
• Standard-voltage Operation
– 2.7 (VCC = 2.7V to 5.5V)
• Automotive Temperature Range –40C to 125C
• Internally Organized 128 x 8 (1K), 256 x 8 (2K), 512 x 8 (4K),
1024 x 8 (8K) or 2048 x 8 (16K)
Two-wire Serial Interface
Schmitt Trigger, Filtered Inputs for Noise Suppression
Bidirectional Data Transfer Protocol
400 kHz Compatibility
Write Protect Pin for Hardware Data Protection
8-byte Page (1K, 2K), 16-byte Page (4K, 8K, 16K) Write Modes
Partial Page Writes are Allowed
Self-timed Write Cycle (5 ms max)
High-reliability
– Endurance: 1 Million Write Cycles
– Data Retention: 100 Years
• 8-lead JEDEC SOIC and 8-lead TSSOP Packages
•
•
•
•
•
•
•
•
•
Two-wire
Automotive
Temperature
Serial EEPROM
1K (128 x 8)
Description
The AT24C01A/02/04/08A/16A provides 1024/2048/4096/8192/16384 bits of serial
electrically erasable and programmable read-only memory (EEPROM) organized as
128/256/512/1024/2048 words of 8 bits each. The device is optimized for use in many
automotive applications where low-power and low-voltage operation are essential.
The AT24C01A/02/04/08A/16A is available in space-saving 8-lead JEDEC SOIC and
8-lead TSSOP packages and is accessed via a two-wire serial interface. In addition,
the entire family is available in 2.7V (2.7V to 5.5V) versions.
8-lead SOIC
Table 1. Pin Configurations
Pin Name
Function
A0  A2
Address Inputs
SDA
Serial Data
SCL
Serial Clock Input
WP
Write Protect
NC
No Connect
A0
A1
A2
GND
1
2
3
4
8
7
6
5
VCC
WP
SCL
SDA
8-lead TSSOP
A0
A1
A2
GND
1
2
3
4
8
7
6
5
VCC
WP
SCL
SDA
2K (256 x 8)
4K (512 x 8)
8K (1024 x 8)
16K (2048 x 8)
AT24C01A(1)
AT24C02(2)
AT24C04
AT24C08A
AT24C16A(3)
1. AT24C01A not recommended
for new design; Replaced by
AT24C01B Automotive.
2. AT24C02 not recommended for
new design; Replaced by
AT24C02B Automotive.
3. AT24C16A not recommended
for new design; replaced by
AT24C16C Automotive.
5092D–SEEPR–4/07
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
Figure 1. Block Diagram
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 bi-directional for serial data transfer. This pin is
open-drain driven and may be wire-ORed with any number of other open-drain or opencollector devices.
DEVICE/PAGE ADDRESSES (A2, A1, A0): The A2, A1 and A0 pins are device
address inputs that are hard wired for the AT24C01A and the AT24C02. As many as
eight 1K/2K devices may be addressed on a single bus system (device addressing is
discussed in detail under the Device Addressing section).
The AT24C04 uses the A2 and A1 inputs for hard wire addressing and a total of four 4K
devices may be addressed on a single bus system. The A0 pin is a no connect.
2
AT24C01A/02/04/08A/16A
5092D–SEEPR–4/07
AT24C01A/02/04/08A/16A
The AT24C08A only uses the A2 input for hardwire addressing and a total of two 8K
devices may be addressed on a single bus system. The A0 and A1 pins are no
connects.
The AT24C16A does not use the device address pins, which limits the number of
devices on a single bus to one. The A0, A1 and A2 pins are no connects.
WRITE PROTECT (WP): The AT24C01A/02/04/08A/16A has a Write Protect pin that
provides hardware data protection. The Write Protect pin allows normal read/write operations when connected to ground (GND). When the Write Protect pin is connected to
VCC, the write protection feature is enabled and operates as shown in the following
table.
Table 2. Write Protect
Memory Organization
Part of the Array Protected
WP Pin
Status
24C01A
24C02
24C04
24C08A
24C16A
At VCC
Full (1K) Array
Full (2K) Array
Full (4K) Array
Full (8K) Array
Full (16K) Array
At GND
Normal Read/Write Operations
AT24C01A, 1K SERIAL EEPROM: Internally organized with 16 pages of 8 bytes each,
the 1K requires a 7-bit data word address for random word addressing.
AT24C02, 2K SERIAL EEPROM: Internally organized with 32 pages of 8 bytes each,
the 2K requires an 8-bit data word address for random word addressing.
AT24C04, 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.
AT24C08A, 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.
AT24C16A, 16K SERIAL EEPROM: Internally organized with 128 pages of 16 bytes
each, the 16K requires an 11-bit data word address for random word addressing.
3
5092D–SEEPR–4/07
Table 3. Pin Capacitance(1)
Applicable over recommended operating range from TA = 25C, f = 1.0 MHz, VCC = +2.7V
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.
Table 4. DC Characteristics
Applicable over recommended operating range from: TA = 40C to +125C, VCC = +2.7V to +5.5V (unless otherwise noted)
Symbol
Parameter
Max
Units
VCC1
Supply Voltage
5.5
V
ICC
Supply Current VCC = 5.0V
Read at 100 kHz
0.4
1.0
mA
ICC
Supply Current VCC = 5.0V
Write at 100 kHz
2.0
3.0
mA
ISB1
Standby Current VCC = 2.7V
VIN = VCC or VSS
1.6
4.0
µA
ISB2
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
0.6
VCC x 0.3
V
VCC x 0.7
VCC + 0.5
V
VIL
Test Condition
Min
Typ
2.7
(1)
Input Low Level
(1)
VIH
Input High Level
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:
4
1. VIL min and VIH max are reference only and are not tested.
AT24C01A/02/04/08A/16A
5092D–SEEPR–4/07
AT24C01A/02/04/08A/16A
Table 5. AC Characteristics
Applicable over recommended operating range from TA = 40C to +125C, VCC = +2.7V to +5.5V, CL = 1 TTL Gate and
100 pF (unless otherwise noted)
AT24C01A/02/04/08A/16A
Symbol
Parameter
Min
fSCL
Clock Frequency, SCL
tLOW
Clock Pulse Width Low
tHIGH
Clock Pulse Width High
Max
Units
400
kHz
1.2
µs
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(2)
1.2
µs
tHD.STA
Start Hold Time
0.6
µs
tSU.STA
Start Set-up Time
0.6
µs
tHD.DAT
Data In Hold Time
0
µs
tSU.DAT
Data In Set-up Time
100
ns
tR
Inputs Rise Time(2)
(2)
50
ns
0.9
µs
300
ns
300
ns
tF
Inputs Fall Time
tSU.STO
Stop Set-up Time
0.6
µs
tDH
Data Out Hold Time
50
ns
Write Cycle Time
tWR
(2)
Endurance
Note:
5.0V, 25C, Page Mode
5
1M
ms
Write Cycles
1. This parameter is characterized and is not 100% tested (TA = 25C).
2. This parameter is characterized.
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 (see to
Figure 4 on page 7). 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 (see to Figure 5 on page 7).
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 (see Figure 5 on page 7).
ACKNOWLEDGE: All addresses and data words are serially transmitted to and from the
EEPROM in 8-bit words. The EEPROM sends a “0” to acknowledge that it has received
each word. This happens during the ninth clock cycle.
STANDBY MODE: The AT24C01A/02/04/08A/16A 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.
5
5092D–SEEPR–4/07
MEMORY RESET: After an interruption in protocol, power loss or system reset, any
two-wire part can be reset by following these steps:
1. Clock up to 9 cycles.
2. Look for SDA high in each cycle while SCL is high.
3. Create a start condition.
Bus Timing
Figure 2. SCL: Serial Clock, SDA: Serial Data I/O
Write Cycle Timing
Figure 3. SCL: Serial Clock, SDA: Serial Data I/O
SCL
SDA
8th BIT
ACK
WORDn
(1)
twr
STOP
CONDITION
Note:
6
START
CONDITION
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.
AT24C01A/02/04/08A/16A
5092D–SEEPR–4/07
AT24C01A/02/04/08A/16A
Figure 4. Data Validity
Figure 5. Start and Stop Definition
SDA
SCL
START
STOP
Figure 6. Output Acknowledge
7
5092D–SEEPR–4/07
Device Addressing
The 1K, 2K, 4K, 8K and 16K EEPROM devices all require an 8-bit device address word
following a start condition to enable the chip for a read or write operation (see to Figure
7 on page 9).
The device address word consists of a mandatory “1”, “0” sequence for the first four
most significant bits as shown. This is common to all the Serial EEPROM devices.
The next 3 bits are the A2, A1 and A0 device address bits for the 1K/2K EEPROM.
These 3 bits must compare to their corresponding hardwired input pins.
The 4K EEPROM only uses the A2 and A1 device address bits with the third bit being a
memory page address bit. The two device address bits must compare to their corresponding hardwired input pins. The A0 pin is no connect.
The 8K EEPROM only uses the A2 device address bit with the next two bits being for
memory page addressing. The A2 bit must compare to its corresponding hardwired
input pin. The A1 and A0 pins are no connect.
The 16K does not use any device address bits but instead the three bits are used for
memory page addressing. These page addressing bits on the 4K, 8K and 16K devices
should be considered the most significant bits of the data word address which follows.
The A0, A1 and A2 pins are no connect.
The eighth bit of the device address is the read/write operation select bit. A read operation is initiated if this bit is high and a write operation is initiated if this bit is low.
Upon a compare of the device address, the EEPROM will output a “0”. 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 “0” and then clock in the first 8-bit data word. Following receipt
of the 8-bit data word, the EEPROM will output a “0” 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 (see Figure 8 on page 10).
PAGE WRITE: The 1K/2K EEPROM is capable of an 8-byte page write, and the 4K, 8K
and 16K devices are capable of 16-byte page writes.
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 seven
(1K/2K) or fifteen (4K, 8K, 16K) more data words. The EEPROM will respond with a “0”
after each data word received. The microcontroller must terminate the page write
sequence with a stop condition (see Figure 9 on page 10).
The data word address lower three (1K/2K) or four (4K, 8K, 16K) 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 eight (1K/2K) or sixteen (4K, 8K, 16K) 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 send-
8
AT24C01A/02/04/08A/16A
5092D–SEEPR–4/07
AT24C01A/02/04/08A/16A
ing 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 “0”, 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 “1”. 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 the first byte of the same page.
Once the device address with the read/write select bit set to “1” 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 “0” but does generate a following
stop condition (see Figure 10 on page 10).
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 “0” but does generate a following stop condition (see Figure 11 on page 11).
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 “0” but does generate a following stop condition
(see Figure 12 on page 11).
Figure 7. Device Address
MSB
9
5092D–SEEPR–4/07
Figure 8. Byte Write
Figure 9. Page Write
(* = DON’T CARE bit for 1K)
Figure 10. Current Address Read
10
AT24C01A/02/04/08A/16A
5092D–SEEPR–4/07
AT24C01A/02/04/08A/16A
Figure 11. Random Read
(* = DON’T CARE bit for 1K)
Figure 12. Sequential Read
11
5092D–SEEPR–4/07
AT24C01A Ordering Information(1)
Ordering Code
Package
AT24C01A-10SQ-2.7
AT24C01A-10TQ-2.7
8S1
8A2
Note:
1.
Operation Range
Lead-free/Halogen-free/Automotive
Temperature
(40C to 125C)
This device is not recommended for new design. Please refer to AT24C01B Automotive datasheet.
Package Type
8S1
8-lead, 0.150" Wide, Plastic Gull Wing Small Outline (JEDEC SOIC)
8A2
8-lead, 0.170" Wide, Thin Shrink Small Outline Package (TSSOP)
Options
2.7
12
Low-voltage (2.7V to 5.5V)
AT24C01A/02/04/08A/16A
5092D–SEEPR–4/07
AT24C01A/02/04/08A/16A
AT24C02 Ordering Information(1)
Ordering Code
Package
AT24C02N-10SQ-2.7
AT24C02-10TQ-2.7
8S1
8A2
Note:
1.
Operation Range
Lead-free/Halogen-free/Automotive
Temperature
(40C to 125C)
This device is not recommended for new design. Please refer to AT24C02B Automotive datasheet.
Package Type
8S1
8-lead, 0.150" Wide, Plastic Gull Wing Small Outline (JEDEC SOIC)
8A2
8-lead, 0.170" Wide, Thin Shrink Small Outline Package (TSSOP)
Options
2.7
Low-voltage (2.7V to 5.5V)
13
5092D–SEEPR–4/07
AT24C04 Ordering Information
Ordering Code
Package
AT24C04N-10SQ-2.7
AT24C04-10TQ-2.7
8S1
8A2
Operation Range
Lead-free/Halogen-free/Automotive
Temperature
(40C to 125C)
Package Type
8S1
8-lead, 0.150" Wide, Plastic Gull Wing Small Outline (JEDEC SOIC)
8A2
8-lead, 0.170" Wide, Thin Shrink Small Outline Package (TSSOP)
Options
2.7
14
Low-voltage (2.7V to 5.5V)
AT24C01A/02/04/08A/16A
5092D–SEEPR–4/07
AT24C01A/02/04/08A/16A
AT24C08A Ordering Information
Ordering Code
Package
Operation Range
8S1
8A2
Lead-free/Halogen-free/
Automotive Temperature
(40C to 125C)
AT24C08AN-10SQ-2.7
AT24C08A-10TQ-2.7
Note:
For 2.7V devices used in the 4.5V to 5.5V range, please refer to performance values in the AC and DC characteristics tables
(Table 4 on page 4 and Table 5 on page 5).
Package Type
8S1
8-lead, 0.150" Wide, Plastic Gull Wing Small Outline (JEDEC SOIC)
8A2
8-lead, 0.170" Wide, Thin Shrink Small Outline Package (TSSOP)
Options
2.7
Low Voltage (2.7V to 5.5V)
15
5092D–SEEPR–4/07
AT24C16A Ordering Information
Ordering Code
Package
Operation Range
AT24C16AN-10SQ-2.7
AT24C16A-10TQ-2.7
8S1
8A2
Lead-free/Halogen-free/
Automotive Temperature
(40C to 125C)
Notes:
1. For 2.7V devices used in the 4.5V to 5.5V range, please refer to performance values in the AC and DC characteristics tables
(Table 4 on page 4 and Table 5 on page 5).
2. AT24C16A not recommended for new design; replaced by AT24C16C Automotive.
Package Type
8S1
8-lead, 0.150" Wide, Plastic Gull Wing Small Outline (JEDEC SOIC)
8A2
8-lead, 0.170" Wide, Thin Shrink Small Outline Package (TSSOP)
Options
2.7
16
Low Voltage (2.7V to 5.5V)
AT24C01A/02/04/08A/16A
5092D–SEEPR–4/07
AT24C01A/02/04/08A/16A
Packaging Information
8S1 – JEDEC SOIC
C
1
E
E1
L
N
∅
Top View
End View
e
B
COMMON DIMENSIONS
(Unit of Measure = mm)
A
A1
D
Side View
SYMBOL
MIN
NOM
MAX
A
1.35
–
1.75
A1
0.10
–
0.25
b
0.31
–
0.51
C
0.17
–
0.25
D
4.80
–
5.00
E1
3.81
–
3.99
E
5.79
–
6.20
e
NOTE
1.27 BSC
L
0.40
–
1.27
∅
0˚
–
8˚
Note: These drawings are for general information only. Refer to JEDEC Drawing MS-012, Variation AA for proper dimensions, tolerances, datums, etc.
10/7/03
R
1150 E. Cheyenne Mtn. Blvd.
Colorado Springs, CO 80906
TITLE
8S1, 8-lead (0.150" Wide Body), Plastic Gull Wing
Small Outline (JEDEC SOIC)
DRAWING NO.
8S1
REV.
B
17
5092D–SEEPR–4/07
8A2 – TSSOP
3
2 1
Pin 1 indicator
this corner
E1
E
L1
N
L
Top View
End View
COMMON DIMENSIONS
(Unit of Measure = mm)
SYMBOL
D
A
b
MIN
NOM
MAX
NOTE
2.90
3.00
3.10
2, 5
3, 5
E
e
A2
D
6.40 BSC
E1
4.30
4.40
4.50
A
–
–
1.20
A2
0.80
1.00
1.05
b
0.19
–
0.30
e
Side View
L
0.65 BSC
0.45
L1
Notes:
0.60
0.75
1.00 REF
1. This drawing is for general information only. Refer to JEDEC Drawing MO-153, Variation AA, for proper dimensions, tolerances,
datums, etc.
2. Dimension D does not include mold Flash, protrusions or gate burrs. Mold Flash, protrusions and gate burrs shall not exceed
0.15 mm (0.006 in) per side.
3. Dimension E1 does not include inter-lead Flash or protrusions. Inter-lead Flash and protrusions shall not exceed 0.25 mm
(0.010 in) per side.
4. Dimension b does not include Dambar protrusion. Allowable Dambar protrusion shall be 0.08 mm total in excess of the
b dimension at maximum material condition. Dambar cannot be located on the lower radius of the foot. Minimum space between
protrusion and adjacent lead is 0.07 mm.
5. Dimension D and E1 to be determined at Datum Plane H.
5/30/02
R
18
4
2325 Orchard Parkway
San Jose, CA 95131
TITLE
8A2, 8-lead, 4.4 mm Body, Plastic
Thin Shrink Small Outline Package (TSSOP)
DRAWING NO.
8A2
REV.
B
AT24C01A/02/04/08A/16A
5092D–SEEPR–4/07
AT24C01A/02/04/08A/16A
Revision History
Doc. Rev.
Date
Comments
5092D
8/2012
AT24C16A not recommended for new design; replaced by
AT24C16C Automotive.
5092D
4/2007
Added ‘Not recommended for new design’ notes to AT24C01A and
AT24C02 on pages 1, 12 and 13.
5092C
2/2007
Implemented revision history.
Removed PDIP offering and parts.
Added ‘AT24C02 Not Recommended for New Design’ note to page
1.
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