24AA1026-I/ST [MICROCHIP]
I2C/2-WIRE SERIAL EEPROM;
| 型号： | 24AA1026-I/ST |
| 厂家： | 
MICROCHIP |
| 描述： | I2C/2-WIRE SERIAL EEPROM 可编程只读存储器 电动程控只读存储器 电可擦编程只读存储器 |
| 文件： | 总32页 (文件大小：685K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
24AA1026/24LC1026/24FC1026
1024K I2C™ Serial EEPROM
This device is capable of both random and sequential
reads. Reads may be sequential within address
Device Selection Table:
Part
Number
VCC
Range
Max. Clock
Frequency
Temp.
Ranges
boundaries 0000h to FFFFh and 10000h to 1FFFFh.
Functional address lines allow up to four devices on the
same data bus. This allows for up to 4 Mbits total
system EEPROM memory. This device is available in
the standard 8-pin PDIP, SOIC, SOIJ and TSSOP
packages.
24AA1026
24LC1026
24FC1026
1.7-5.5V
2.5-5.5V
1.8-5.5V
400 kHz†
400 kHz*
1 MHz‡
I
I, E
I
†100 kHz for VCC < 2.5V
*100 kHz for VCC <4.5V, E-temp
Package Type
‡400 kHz for VCC < 2.5V
PDIP
NC
1
8
VCC
Features:
A1
A2
2
3
4
7
6
5
WP
• Low-Power CMOS Technology:
- Read current 450 A, maximum
- Standby current 5 A, maximum
• 2-Wire Serial Interface, I2C™ Compatible
• Cascadable up to Four Devices
SCL
SDA
VSS
SOIJ/SOIC/TSSOP
• Schmitt Trigger Inputs for Noise Suppression
• Output Slope Control to Eliminate Ground Bounce
• 100 kHz and 400 kHz Clock Compatibility
• 1 MHz Clock for FC Versions
1
8
7
NC
VCC
2
A1
WP
3
6
5
A2
SCL
SDA
• Page Write Time 3 ms, typical
• Self-Timed Erase/Write Cycle
4
VSS
• 128-Byte Page Write Buffer
• Hardware Write-Protect
Block Diagram
• ESD Protection >4000V
• More than 1 Million Erase/Write Cycles
• Data Retention >200 Years
A1A2 WP
HV Generator
• Factory Programming Available
• Packages include 8-lead PDIP, SOIJ, SOIC and
TSSOP
I/O
Control
Logic
Memory
Control
Logic
EEPROM
Array
XDEC
• RoHS Compliant
Page Latches
• Temperature Ranges:
- Industrial (I):
-40C to +85C
I/O
SCL
- Automotive (E): -40C to +125C
YDEC
SDA
Description:
V
CC
The Microchip Technology Inc. 24AA1026/24LC1026/
24FC1026 (24XX1026*) is a 128K x 8 (1024K bit)
Serial Electrically Erasable PROM, capable of
operation across a broad voltage range (1.7V to 5.5V).
It has been developed for advanced, low-power
applications such as personal communications or data
acquisition. This device has both byte write and page
write capability of up to 128 bytes of data.
Sense AMP
R/W Control
VSS
*24XX1026 is used in this document as a generic part number
for the 24AA1026/24LC1026/24FC1026 devices.
2011-2013 Microchip Technology Inc.
DS20002270D-page 1
24AA1026/24LC1026/24FC1026
1.0
ELECTRICAL CHARACTERISTICS
(†)
Absolute Maximum Ratings
VCC.............................................................................................................................................................................6.5V
All inputs and outputs w.r.t. VSS .......................................................................................................... -0.6V to VCC+1.0V
Storage temperature ...............................................................................................................................-65°C to +150°C
Ambient temperature with power applied................................................................................................-40°C to +125°C
ESD protection on all pins 4 kV
† NOTICE: Stresses above 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 those or any other conditions above those
indicated in the operational listings of this specification is not implied. Exposure to maximum rating conditions for
extended periods may affect device reliability.
TABLE 1-1:
DC CHARACTERISTICS
Industrial (I):
VCC = +1.7V to 5.5V TA = -40°C to +85°C
DC CHARACTERISTICS
Automotive (E): Vcc = +2.5V to 5.5V TA = -40°C to +125°C
Param.
Sym.
No.
Characteristic
Min.
Max.
Units
Conditions
—
A1, A2, SCL, SDA and
WP pins:
—
—
—
D1
D2
VIH
VIL
High-level input voltage
Low-level input voltage
0.7 VCC
—
—
V
0.3 VCC
0.2 VCC
V
V
VCC 2.5V
VCC < 2.5V
D3
VHYS
Hysteresis of Schmitt
Trigger inputs
0.05 VCC
—
V
VCC 2.5V (Note)
(SDA, SCL pins)
D4
D5
VOL
ILI
Low-level output voltage
Input leakage current
Output leakage current
—
—
0.40
±1
V
IOL = 3.0 mA @ VCC = 4.5V
IOL = 2.1 mA @ VCC = 2.5V
A
VIN = VSS or VCC
VIN = VSS or VCC
D6
D7
ILO
—
—
±1
10
A
VOUT = VSS or VCC
CIN,
Pin capacitance
pF
VCC = 5.0V (Note)
COUT
(all inputs/outputs)
TA = 25°C, FCLK = 1 MHz
D8
D9
ICC Read Operating current
ICC Write
—
—
—
450
5
A
mA
A
VCC = 5.5V, SCL = 400 kHz
VCC = 5.5V
ICCS
Standby current
5
SCL, SDA, VCC = 5.5V
A1, A2, WP = VSS
Note:
This parameter is periodically sampled and not 100% tested.
DS20002270D-page 2
2011-2013 Microchip Technology Inc.
24AA1026/24LC1026/24FC1026
TABLE 1-2:
AC CHARACTERISTICS
Industrial (I):
VCC = +1.7V to 5.5V TA = -40°C to +85°C
AC CHARACTERISTICS
Automotive (E): Vcc = +2.5V to 5.5V TA = -40°C to +125°C
Param.
Sym.
No.
Characteristic
Clock frequency
Min.
Max.
Units
Conditions
1
2
3
4
FCLK
THIGH
TLOW
TR
—
—
—
—
—
100
100
400
400
1000
kHz 1.7V VCC 2.5V
2.5V VCC 4.5V, E-temp
2.5V VCC 5.5V
1.8V VCC 2.5V (24FC1026 only)
2.5V VCC 5.5V (24FC1026 only)
Clock high time
Clock low time
4000
4000
600
600
500
—
—
—
—
—
ns
ns
ns
1.7V VCC 2.5V
2.5V VCC 4.5V, E-temp
2.5V VCC 5.5V
1.8V VCC 2.5V (24FC1026 only)
2.5V VCC 5.5V (24FC1026 only)
4700
4700
1300
1300
500
—
—
—
—
—
1.7V VCC 2.5V
2.5V VCC 4.5V, E-temp
2.5V VCC 5.5V
1.8V VCC 2.5V (24FC1026 only)
2.5V VCC 5.5V (24FC1026 only)
SDA and SCL rise time
(Note 1)
—
—
—
—
—
1000
1000
300
300
300
1.7V VCC 2.5V
2.5V VCC 4.5V, E-temp
2.5V VCC 5.5V
1.8V VCC 2.5V (24FC1026 only)
2.5V VCC 5.5V (24FC1026 only)
5
6
TF
SDA and SCL fall time
(Note 1)
—
—
300
100
ns
ns
All except 24FC1026
1.8V VCC 5.5V (24FC1026 only)
THD:STA Start condition hold time
4000
4000
600
600
250
—
—
—
—
—
1.7V VCC 2.5V
2.5V VCC 4.5V, E-temp
2.5V VCC 5.5V
1.8V VCC 2.5V (24FC1026 only)
2.5V VCC 5.5V (24FC1026 only)
7
TSU:STA Start condition setup time
4700
4700
600
600
250
—
—
—
—
—
ns
1.7V VCC 2.5V
2.5V VCC 4.5V, E-temp
2.5V VCC 5.5V
1.8V VCC 2.5V (24FC1026 only)
2.5V VCC 5.5V (24FC1026 only)
8
9
THD:DAT Data input hold time
TSU:DAT Data input setup time
0
—
ns
ns
(Note 2)
250
250
100
100
100
—
—
—
—
—
1.7V VCC 2.5V
2.5V VCC 4.5V, E-temp
2.5V VCC 5.5V
1.8V VCC 2.5V (24FC1026 only)
2.5V VCC 5.5V (24FC1026 only)
10
TSU:STO Stop condition setup time
4000
4000
600
600
250
—
—
—
—
—
ns
1.7V VCC 2.5V
2.5V VCC 4.5V, E-temp
2.5V VCC 5.5V
1.8V VCC 2.5V (24FC1026 only)
2.5V VCC 5.5V (24FC1026 only)
Note 1: Not 100% tested. CB = total capacitance of one bus line in pF.
2: As a transmitter, the device must provide an internal minimum delay time to bridge the undefined region (minimum
300 ns) of the falling edge of SCL to avoid unintended generation of Start or Stop conditions.
3: The combined TSP and VHYS specifications are due to new Schmitt Trigger inputs which provide improved noise spike
suppression. This eliminates the need for a TI specification for standard operation.
4: This parameter is not tested but established by characterization. For endurance estimates in a specific application,
please consult the Total Endurance™ Model which can be obtained from Microchip’s web site at www.microchip.com.
2011-2013 Microchip Technology Inc.
DS20002270D-page 3
24AA1026/24LC1026/24FC1026
Industrial (I):
VCC = +1.7V to 5.5V TA = -40°C to +85°C
AC CHARACTERISTICS (Continued)
Param.
Automotive (E): Vcc = +2.5V to 5.5V TA = -40°C to +125°C
Sym.
Characteristic
Min.
Max.
Units
Conditions
1.7V VCC 2.5V
2.5V VCC 4.5V, E-temp
2.5V VCC 5.5V
No.
11
12
13
14
15
TSU:WP WP setup time
4000
4000
600
600
600
—
—
—
—
—
ns
1.8V VCC 2.5V (24FC1026 only)
2.5V VCC 5.5V (24FC1026 only)
THD:WP WP hold time
4700
4700
1300
1300
1300
—
—
—
—
—
ns
ns
ns
1.7V VCC 2.5V
2.5V VCC 4.5V, E-temp
2.5V VCC 5.5V
1.8V VCC 2.5V (24FC1026 only)
2.5V VCC 5.5V (24FC1026 only)
TAA
Output valid from clock
—
—
—
—
—
3500
3500
900
900
400
1.7V VCC 2.5V
2.5V VCC 4.5V, E-temp
2.5V VCC 5.5V
1.8V VCC 2.5V (24FC1026 only)
2.5V VCC 5.5V (24FC1026 only)
(Note 2)
TBUF
Bus free time: Time the bus
must be free before a new
transmission can start
4700
4700
1300
1300
500
—
—
—
—
—
1.7V VCC 2.5V
2.5V VCC 4.5V, E-temp
2.5V VCC 5.5V
1.8V VCC 2.5V (24FC1026 only)
2.5V VCC 5.5V (24FC1026 only)
TSP
Input filter spike suppression
(SDA and SCL pins)
—
50
ns
All except 24FC1026 (Note 1 and Note 3)
16
17
TWC
Write cycle time (byte or page)
Endurance
—
5
ms
—
1,000,000
—
cycles Page mode, 25°C, VCC = 5.5V (Note 4)
Note 1: Not 100% tested. CB = total capacitance of one bus line in pF.
2: As a transmitter, the device must provide an internal minimum delay time to bridge the undefined region (minimum
300 ns) of the falling edge of SCL to avoid unintended generation of Start or Stop conditions.
3: The combined TSP and VHYS specifications are due to new Schmitt Trigger inputs which provide improved noise spike
suppression. This eliminates the need for a TI specification for standard operation.
4: This parameter is not tested but established by characterization. For endurance estimates in a specific application,
please consult the Total Endurance™ Model which can be obtained from Microchip’s web site at www.microchip.com.
FIGURE 1-1:
BUS TIMING DATA
5
4
D3
2
SCL
7
3
10
8
9
SDA
IN
6
15
14
12
13
SDA
OUT
(protected)
WP
11
(unprotected)
DS20002270D-page 4
2011-2013 Microchip Technology Inc.
24AA1026/24LC1026/24FC1026
2.0
PIN DESCRIPTIONS
The descriptions of the pins are listed in Table 2-1.
TABLE 2-1:
Name
PIN FUNCTION TABLE
PDIP
SOIJ
SOIC
TSSOP
Function
NC
A1
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
Not Connected
User Configurable Chip Select
User Configurable Chip Select
Ground
A2
VSS
SDA
SCL
WP
VCC
Serial Data
Serial Clock
Write-Protect Input
+1.7 to 5.5V (24AA1026)
+2.5 to 5.5V (24LC1026)
+1.8 to 5.5V (24FC1026)
2.1
A1, A2 Chip Address Inputs
The A1 and A2 inputs are used by the 24XX1026 for
multiple device operations. The levels on these inputs
are compared with the corresponding bits in the slave
address. The chip is selected if the comparison is true.
Up to four devices may be connected to the same bus
by using different Chip Select bit combinations. In most
applications, the chip address inputs A1 and A2 are
hard-wired to logic ‘0’ or logic ‘1’. For applications in
which these pins are controlled by a microcontroller or
other programmable device, the chip address pins
must be driven to logic ‘0’ or logic ‘1’ before normal
device operation can proceed.
2.2
Serial Data (SDA)
This is a bidirectional pin used to transfer addresses
and data into and data out of the device. It is an open-
drain terminal, therefore, the SDA bus requires a pull-
up resistor to VCC (typical 10 k for 100 kHz, 2 kfor
400 kHz and 1 MHz).
For normal data transfer SDA is allowed to change only
during SCL low. Changes during SCL high are
reserved for indicating the Start and Stop conditions.
2.3
Serial Clock (SCL)
This input is used to synchronize the data transfer from
and to the device.
2.4
Write-Protect (WP)
This pin must be connected to either VSS or VCC. If tied
to VSS, write operations are enabled. If tied to VCC,
write operations are inhibited, but read operations are
not affected.
2011-2013 Microchip Technology Inc.
DS20002270D-page 5
24AA1026/24LC1026/24FC1026
3.0
FUNCTIONAL DESCRIPTION
The 24XX1026 supports a bidirectional 2-wire bus and
data transmission protocol. A device that sends data
onto the bus is defined as a transmitter and a device
receiving data as a receiver. The bus must be
controlled by a master device which generates the
Serial Clock (SCL), controls the bus access, and
generates the Start and Stop conditions while the
24XX1026 works as a slave. Both master and slave
can operate as a transmitter or receiver, but the master
device determines which mode is activated.
DS20002270D-page 6
2011-2013 Microchip Technology Inc.
24AA1026/24LC1026/24FC1026
The data on the line must be changed during the low
period of the clock signal. There is one bit of data per
clock pulse.
4.0
BUS CHARACTERISTICS
The following bus protocol has been defined:
• Data transfer may be initiated only when the bus
is not busy.
Each data transfer is initiated with a Start condition and
terminated with a Stop condition. The number of the
data bytes transferred between the Start and Stop
conditions is determined by the master device.
• During data transfer, the data line must remain
stable whenever the clock line is high. Changes in
the data line while the clock line is high will be
interpreted as a Start or Stop condition.
4.5
Acknowledge
Accordingly, the following bus conditions have been
defined (Figure 4-1).
Each receiving device, when addressed, is obliged to
generate an Acknowledge signal after the reception of
each byte. The master device must generate an extra
clock pulse which is associated with this Acknowledge
bit.
4.1
Bus Not Busy (A)
Both data and clock lines remain high.
Note:
The 24XX1026 does not generate any
Acknowledge bits if an internal program-
ming cycle is in progress, however, the
control byte that is being polled must
match the control byte used to initiate the
write cycle.
4.2
Start Data Transfer (B)
A high-to-low transition of the SDA line while the clock
(SCL) is high determines a Start condition. All
commands must be preceded by a Start condition.
A device that acknowledges must pull-down the SDA
line during the Acknowledge clock pulse in such a way
that the SDA line is stable low during the high period of
the acknowledge related clock pulse. Of course, setup
and hold times must be taken into account. During
reads, a master must signal an end of data to the slave
by NOT generating an Acknowledge bit on the last byte
that has been clocked out of the slave. In this case, the
slave (24XX1026) will leave the data line high to enable
the master to generate the Stop condition.
4.3
Stop Data Transfer (C)
A low-to-high transition of the SDA line while the clock
(SCL) is high determines a Stop condition. All
operations must end with a Stop condition.
4.4
Data Valid (D)
The state of the data line represents valid data when,
after a Start condition, the data line is stable for the
duration of the high period of the clock signal.
FIGURE 4-1:
DATA TRANSFER SEQUENCE ON THE SERIAL BUS
(A)
(B)
(D)
(D)
(C) (A)
SCL
SDA
Start
Condition
Address or
Acknowledge
Valid
Data
Allowed
To Change
Stop
Condition
FIGURE 4-2:
ACKNOWLEDGE TIMING
Acknowledge
Bit
1
2
3
4
5
6
7
8
9
1
2
3
SCL
SDA
Data from transmitter
Data from transmitter
The transmitter must release the SDA line at this
point allowing the receiver to pull the SDA line low
to acknowledge the previous eight bits of data.
The receiver must release the SDA line at this
point so the transmitter can continue sending
data.
2011-2013 Microchip Technology Inc.
DS20002270D-page 7
24AA1026/24LC1026/24FC1026
FIGURE 5-1:
CONTROL BYTE
FORMAT
5.0
DEVICE ADDRESSING
A control byte is the first byte received following the
Start condition from the master device (Figure 5-1).
The control byte consists of a 4-bit control code; for the
24XX1026, this is set as ‘1010’ binary for read and
write operations. The next two bits of the control byte
are the Chip Select bits (A2, A1). The Chip Select bits
allow the use of up to four 24XX1026 devices on the
same bus and are used to select which device is
accessed. The Chip Select bits in the control byte must
correspond to the logic levels on the corresponding A2
and A1 pins for the device to respond. These bits are in
effect the two Most Significant bits (MSb) of the word
address. The next bit of the control byte is the block
select bit (B0). This bit acts as the A16 address bit for
accessing the entire array.
Read/Write Bit
Chip
Select
Bits
Block
Select
Bit
Control Code
S
1
0
1
0
A2 A1 B0 R/W ACK
Slave Address
Start Bit
Acknowledge Bit
5.1
Contiguous Addressing Across
Multiple Devices
The last bit of the control byte defines the operation to
be performed. When set to a one, a read operation is
selected, and when set to a zero, a write operation is
selected. The next two bytes received define the
address of the first data byte (Figure 5-2). The upper
address bits are transferred first, followed by the Least
Significant bits (LSb).
The Chip Select bits A2 and A1 can be used to expand
the contiguous address space for up to 4 Mbit by add-
ing up to four 24XX1026’s on the same bus. In this
case, software can use A1 of the control byte as
address bit A17 and A2 as address bit A18. It is not
possible to sequentially read across device boundar-
ies.
Following the Start condition, the 24XX1026 monitors
the SDA bus checking the device type identifier being
transmitted. Upon receiving a ‘1010’ code and
appropriate device select bits, the slave device outputs
an Acknowledge signal on the SDA line. Depending on
the state of the R/W bit, the 24XX1026 will select a read
or write operation.
Each device has internal addressing boundary
limitations. This divides each part into two segments of
512K bits. The block select bit ‘B0’ controls access to
each “half”.
Sequential read operations are limited to 512K blocks.
To read through four devices on the same bus, eight
random Read commands must be given.
This device has an internal addressing boundary
limitation that is divided into two segments of 512K bits.
Block select bit ‘B0’ is used to control access to each
segment.
FIGURE 5-2:
ADDRESS SEQUENCE BIT ASSIGNMENTS
Control Byte
Address High Byte
Address Low Byte
A
A
A
A
A
2
A
1
B
0
A
A
A
9
A
8
A
7
A
0
•
•
•
•
•
•
1
0
1
0
R/W
12 11 10
15 14 13
Block
Select
Bit
Chip
Select
Bits
Control
Code
DS20002270D-page 8
2011-2013 Microchip Technology Inc.
24AA1026/24LC1026/24FC1026
6.2
Page Write
6.0
6.1
WRITE OPERATIONS
Byte Write
The write control byte, word address and the first data
byte are transmitted to the 24XX1026 in the same way
as in a byte write. But instead of generating a Stop
condition, the master transmits up to 127 additional
bytes, which are temporarily stored in the on-chip page
buffer and will be written into memory after the master
has transmitted a Stop condition. After receipt of each
word, the seven lower Address Pointer bits are
internally incremented by one. If the master should
transmit more than 128 bytes prior to generating the
Stop condition, the address counter will roll over and
the previously received data will be overwritten. As with
the byte write operation, once the Stop condition is
received, an internal write cycle will begin (Figure 6-2).
If an attempt is made to write to the array with the WP
pin held high, the device will acknowledge the
command, but no write cycle will occur, no data will be
written and the device will immediately accept a new
command.
Following the Start condition from the master, the
control code (four bits), the Chip Select (two bits), the
block select (one bit), and the R/W bit (which is a logic
low) are clocked onto the bus by the master transmitter.
This indicates to the addressed slave receiver that the
address high byte will follow after it has generated an
Acknowledge bit during the ninth clock cycle.
Therefore, the next byte transmitted by the master is
the high-order byte of the word address and will be
written into the Address Pointer of the 24XX1026. The
next byte is the Least Significant Address Byte. After
receiving another Acknowledge signal from the
24XX1026, the master device will transmit the data
word to be written into the addressed memory location.
The 24XX1026 acknowledges again and the master
generates a Stop condition. This initiates the internal
write cycle and during this time, the 24XX1026 will not
generate Acknowledge signals as long as the control
byte being polled matches the control byte that was
used to initiate the write (Figure 6-1). If an attempt is
made to write to the array with the WP pin held high, the
device will acknowledge the command, but no write
cycle will occur, no data will be written and the device
will immediately accept a new command. After a byte
Write command, the internal address counter will point
to the address location following the one that was just
written.
6.3
Write Protection
The WP pin allows the user to write-protect the entire
array (00000-1FFFF) when the pin is tied to VCC. If tied
to VSS the write protection is disabled. The WP pin is
sampled at the Stop bit for every Write command
(Figure 1-1). Toggling the WP pin after the Stop bit will
have no effect on the execution of the write cycle.
Note:
Page write operations are limited to writ-
ing bytes within a single physical page,
regardless of the number of bytes actually
being written. Physical page boundaries
start at addresses that are integer
multiples of the page buffer size (or ‘page
size’) and end at addresses that are
integer multiples of [page size – 1]. If a
Page Write command attempts to write
across a physical page boundary, the
result is that the data wraps around to the
beginning of the current page (overwriting
data previously stored there), instead of
being written to the next page as might be
expected. It is therefore necessary for the
application software to prevent page write
operations that would attempt to cross a
page boundary.
Note:
When doing a write of less than 128 bytes
the data in the rest of the page is
refreshed along with the data bytes being
written. This will force the entire page to
endure a write cycle, for this reason
endurance is specified per page.
2011-2013 Microchip Technology Inc.
DS20002270D-page 9
24AA1026/24LC1026/24FC1026
FIGURE 6-1:
BYTE WRITE
S
T
A
R
T
BUS ACTIVITY
MASTER
S
T
O
P
Control
Byte
Address
High Byte
Address
Low Byte
Data
A A B
SDA LINE
S 1 0 1 0
0
P
2 1 0
A
C
K
A
C
K
A
C
K
A
C
K
BUS ACTIVITY
FIGURE 6-2:
PAGE WRITE
S
T
A
R
T
S
T
O
P
Control
Byte
Address
High Byte
Address
Low Byte
BUS ACTIVITY
MASTER
Data Byte 0
Data Byte 127
A A B
SDA LINE
P
S 1 0 1 0
0
2 1 0
A
C
K
A
C
K
A
C
K
A
C
K
A
C
K
BUS ACTIVITY
DS20002270D-page 10
2011-2013 Microchip Technology Inc.
24AA1026/24LC1026/24FC1026
FIGURE 7-1:
ACKNOWLEDGE
POLLING FLOW
7.0
ACKNOWLEDGE POLLING
Since the device will not acknowledge during a write
cycle, this can be used to determine when the cycle is
complete. (This feature can be used to maximize bus
throughput.) Once the Stop condition for a Write
command has been issued from the master, the device
initiates the internally timed write cycle. ACK polling
can be initiated immediately. This involves the master
sending a Start condition, followed by the control byte
for a Write command (R/W = 0). If the device is still
busy with the write cycle, then no ACK will be returned.
If no ACK is returned, then the Start bit and control byte
must be resent. If the cycle is complete, then the device
will return the ACK and the master can then proceed
with the next Read or Write command. See Figure 7-1
for flow diagram.
Send
Write Command
Send Stop
Condition to
Initiate Write Cycle
Send Start
Note:
Care must be taken when polling the
24XX1026. The control byte that was
used to initiate the write needs to match
the control byte used for polling.
Send Control Byte
with R/W = 0
Did Device
Acknowledge
(ACK = 0)?
No
Yes
Next
Operation
2011-2013 Microchip Technology Inc.
DS20002270D-page 11
24AA1026/24LC1026/24FC1026
8.2
Random Read
8.0
READ OPERATION
Random read operations allow the master to access
any memory location in a random manner. To perform
this type of read operation, first the word address must
be set. This is done by sending the word address to the
24XX1026 as part of a write operation (R/W bit set to
0). After the word address is sent, the master
generates a Start condition following the acknowledge.
This terminates the write operation, but not before the
internal Address Pointer is set. Then, the master issues
the control byte again, but with the R/W bit set to a one.
The 24XX1026 will then issue an acknowledge and
transmit the 8-bit data word. The master will not
acknowledge the transfer, but does generate a Stop
condition which causes the 24XX1026 to discontinue
Read operations are initiated in the same way as write
operations with the exception that the R/W bit of the
control byte is set to one. There are three basic types
of read operations: current address read, random read
and sequential read.
8.1
Current Address Read
The 24XX1026 contains an address counter that
maintains the address of the last word accessed,
internally incremented by one. Therefore, if the
previous read access was to address n (n is any legal
address), the next current address read operation
would access data from address n + 1.
transmission (Figure 8-2). After
command, the internal address counter will point to the
address location following the one that was just read.
a random Read
Upon receipt of the control byte with R/W bit set to one,
the 24XX1026 issues an acknowledge and transmits
the 8-bit data word. The master will not acknowledge
the transfer, but does generate a Stop condition and the
24XX1026 discontinues transmission (Figure 8-1).
8.3
Sequential Read
Sequential reads are initiated in the same way as a
random read except that after the 24XX1026 transmits
the first data byte, the master issues an acknowledge
as opposed to the Stop condition used in a random
read. This acknowledge directs the 24XX1026 to
transmit the next sequentially addressed 8-bit word
(Figure 8-3). Following the final byte transmitted to the
master, the master will NOT generate an acknowledge,
but will generate a Stop condition. To provide
sequential reads, the 24XX1026 contains an internal
Address Pointer which is incremented by one at the
completion of each operation. This Address Pointer
allows half the memory contents to be serially read
during one operation. Sequential read address
boundaries are 00000h to 0FFFFh and 10000h to
1FFFFh. The internal Address Pointer will
automatically roll over from address 0FFFFh to
address 00000h if the master acknowledges the byte
received from the array address, 0FFFFh. The internal
address counter will automatically roll over from
address 1FFFFh to address 10000h if the master
acknowledges the byte received from the array
address, 1FFFFh.
FIGURE 8-1:
CURRENT ADDRESS
READ
S
T
A
R
T
S
T
O
P
BUS ACTIVITY
MASTER
Control
Byte
Data
Byte
A A B
2 1 0
SDA LINE
S 1 0 1 0
1
P
A
C
K
N
O
BUS ACTIVITY
A
C
K
DS20002270D-page 12
2011-2013 Microchip Technology Inc.
24AA1026/24LC1026/24FC1026
FIGURE 8-2:
RANDOM READ
S
T
A
R
T
S
T
A
R
T
BUS ACTIVITY
MASTER
S
T
O
P
Control
Byte
Address
Address
Control
Byte
Data
Byte
High Byte
Low Byte
A A B
2 1 0
A A B
2 1 0
SDA LINE
S 1 0 1 0
0
S 1 0 1 0
1
P
N
O
A
C
K
A
C
K
A
C
K
A
C
K
BUS ACTIVITY
A
C
K
FIGURE 8-3:
SEQUENTIAL READ
S
T
O
P
Control
BUS ACTIVITY
MASTER
Byte
Data n
Data n + 1
Data n + X
Data n + 2
P
SDA LINE
A
C
K
A
C
K
A
C
K
A
C
K
N
O
BUS ACTIVITY
A
C
K
2011-2013 Microchip Technology Inc.
DS20002270D-page 13
24AA1026/24LC1026/24FC1026
9.0
9.1
PACKAGING INFORMATION
Package Marking Information
8-Lead PDIP (300 mil)
Example:
XXXXXXXX
TXXXXNNN
24LC1026
I/P 13F
e
3
YYWW
1028
8-Lead SOIC (3.90 mm)
Example
:
24L1026I
XXXXXXXT
XXXXYYWW
NNN
SN
1028
13F
e
3
8-Lead SOIJ (5.28 mm)
Example
:
24LC1026
I/SM
1028 13F
XXXXXXXX
TXXXXXXX
YYWWNNN
e
3
Example:
8-Lead TSSOP
XXXX
TYWW
4LG
I321
NNN
017
First Line Marking Codes
Part No.
24AA1026
TSSOP Package Codes
4AG
4LG
4FG
24LC1026
24FC1026
DS20002270D-page 14
2011-2013 Microchip Technology Inc.
24AA1026/24LC1026/24FC1026
Package Marking Information (Continued)
Legend: XX...X Part number or part number code
T
Temperature (I, E)
Y
Year code (last digit of calendar year)
Year code (last 2 digits of calendar year)
Week code (week of January 1 is week ‘01’)
Alphanumeric traceability code (2 characters for small packages)
JEDEC designator for Matte Tin (Sn)
YY
WW
NNN
e
3
Note:
For very small packages with no room for the JEDEC designator
, the marking will only appear on the outer carton or reel label.
e
3
Note: In the event the full Microchip part number cannot be marked on one line, it will
be carried over to the next line, thus limiting the number of available
characters for customer-specific information.
*
Standard marking consists of Microchip part number, year code, week code, traceability code (facility
code, mask rev#, and assembly code). For marking beyond this, certain price adders apply. Please
check with your Microchip Sales Office.
2011-2013 Microchip Technology Inc.
DS20002270D-page 15
24AA1026/24LC1026/24FC1026
ꢀꢁꢂꢃꢄꢅꢆꢇꢈꢄꢉꢊꢋꢌꢆꢍꢎꢄꢈꢆꢏꢐꢁꢂꢋꢐꢃꢆꢑꢇꢒꢆꢓꢆꢔꢕꢕꢆꢖꢋꢈꢆꢗꢘꢅꢙꢆꢚꢇꢍꢏꢇꢛ
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N
NOTE 1
E1
3
1
2
D
E
A2
A
L
A1
c
e
eB
b1
b
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DS20002270D-page 16
2011-2013 Microchip Technology Inc.
24AA1026/24LC1026/24FC1026
Note: For the most current package drawings, please see the Microchip Packaging Specification located at
http://www.microchip.com/packaging
2011-2013 Microchip Technology Inc.
DS20002270D-page 17
24AA1026/24LC1026/24FC1026
Note: For the most current package drawings, please see the Microchip Packaging Specification located at
http://www.microchip.com/packaging
DS20002270D-page 18
2011-2013 Microchip Technology Inc.
24AA1026/24LC1026/24FC1026
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2011-2013 Microchip Technology Inc.
DS20002270D-page 19
24AA1026/24LC1026/24FC1026
Note: For the most current package drawings, please see the Microchip Packaging Specification located at
http://www.microchip.com/packaging
DS20002270D-page 20
2011-2013 Microchip Technology Inc.
24AA1026/24LC1026/24FC1026
Note: For the most current package drawings, please see the Microchip Packaging Specification located at
http://www.microchip.com/packaging
2011-2013 Microchip Technology Inc.
DS20002270D-page 21
24AA1026/24LC1026/24FC1026
Note: For the most current package drawings, please see the Microchip Packaging Specification located at
http://www.microchip.com/packaging
DS20002270D-page 22
2011-2013 Microchip Technology Inc.
24AA1026/24LC1026/24FC1026
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N
E
E1
NOTE 1
1
2
b
e
c
φ
A
A2
A1
L
L1
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ꢼꢠꢬꢪ ꢼꢌꢎꢌꢐꢌꢄꢖꢌꢅꢟꢃꢑꢌꢄꢇꢃꢕꢄꢓꢅꢈꢇꢈꢉꢊꢊꢒꢅꢗꢃꢏꢘꢕꢈꢏꢅꢏꢕꢊꢌꢐꢉꢄꢖꢌꢓꢅꢎꢕꢐꢅꢃꢄꢎꢕꢐꢑꢉꢏꢃꢕꢄꢅꢡꢈꢐꢡꢕꢇꢌꢇꢅꢕꢄꢊꢒꢁ
ꢢꢃꢖꢐꢕꢖꢘꢃꢡ ꢫꢌꢖꢘꢄꢕꢊꢕꢜꢒ ꢟꢐꢉꢗꢃꢄꢜ ꢝꢣꢥꢽꢣꢶꢺꢩ
2011-2013 Microchip Technology Inc.
DS20002270D-page 23
24AA1026/24LC1026/24FC1026
Note: For the most current package drawings, please see the Microchip Packaging Specification located at
http://www.microchip.com/packaging
DS20002270D-page 24
2011-2013 Microchip Technology Inc.
24AA1026/24LC1026/24FC1026
APPENDIX A: REVISION HISTORY
Revision A (01/2011)
Original release.
Revision B (5/2011)
Added Automotive Temp.
Revision C (04/2012)
Revised document title (removed CMOS); Revised
Table 1-1, Param D9; Revised Section 5.1.
Revision D (07/2013)
Added TSSOP package.
2011-2013 Microchip Technology Inc.
DS20002270D-page 25
24AA1026/24LC1026/24FC1026
NOTES:
DS20002270D-page 26
2011-2013 Microchip Technology Inc.
24AA1026/24LC1026/24FC1026
THE MICROCHIP WEB SITE
CUSTOMER SUPPORT
Microchip provides online support via our WWW site at
www.microchip.com. This web site is used as a means
to make files and information easily available to
customers. Accessible by using your favorite Internet
browser, the web site contains the following
information:
Users of Microchip products can receive assistance
through several channels:
• Distributor or Representative
• Local Sales Office
• Field Application Engineer (FAE)
• Technical Support
• Product Support – Data sheets and errata,
application notes and sample programs, design
resources, user’s guides and hardware support
documents, latest software releases and archived
software
Customers
should
contact
their
distributor,
representative or Field Application Engineer (FAE) for
support. Local sales offices are also available to help
customers. A listing of sales offices and locations is
included in the back of this document.
• General Technical Support – Frequently Asked
Questions (FAQ), technical support requests,
online discussion groups, Microchip consultant
program member listing
Technical support is available through the web site
at: http://microchip.com/support
• Business of Microchip – Product selector and
ordering guides, latest Microchip press releases,
listing of seminars and events, listings of
Microchip sales offices, distributors and factory
representatives
CUSTOMER CHANGE NOTIFICATION
SERVICE
Microchip’s customer notification service helps keep
customers current on Microchip products. Subscribers
will receive e-mail notification whenever there are
changes, updates, revisions or errata related to a
specified product family or development tool of interest.
To register, access the Microchip web site at
www.microchip.com. Under “Support”, click on
“Customer Change Notification” and follow the
registration instructions.
2011-2013 Microchip Technology Inc.
DS20002270D-page 27
24AA1026/24LC1026/24FC1026
NOTES:
DS20002270D-page 28
2011-2013 Microchip Technology Inc.
24AA1026/24LC1026/24FC1026
PRODUCT IDENTIFICATION SYSTEM
To order or obtain information, e.g., on pricing or delivery, refer to the factory or the listed sales office.
PART NO.
Device
X
/XX
Examples:
Temperature Package
Range
a) 24AA1026T-I/SM: Tape and Reel, Indus-
trial Temperature, 1.7V, SOIJ package.
b) 24LC1026-I/P: Industrial Temperature,
2.5V, PDIP package.
2
Device:
24AA1026= 1024K Bit 1.7V I C CMOS Serial EEPROM
24AA1026T = 1024K Bit 1.7V I C CMOS Serial EEPROM
c) 24LC1026T-I/SM: Tape and Reel, Indus-
trial Temperature, 2.5V, SOIJ package.
d) 24FC1026-I/SN: Tape and Reel, Indus-
trial Temperature, 1.8V, SOIC package.
e) 24LC1026-I/ST: Industrial Temperature,
2.5V, TSSOP package
2
(Tape and Reel)
2
24LC1026 = 1024K Bit 2.5V I C CMOS Serial EEPROM
24LC1026T= 1024K Bit 2.5V I C CMOS Serial EEPROM
2
(Tape and Reel)
2
24FC1026= 1024K Bit 1.8V I C CMOS Serial EEPROM
24FC1026T= 1024K Bit 1.8V I C CMOS Serial EEPROM
f)
24LC1026-E/SM: Extended temperature,
2.5V, SOIJ package.
2
(Tape and Reel)
g) 24AA1026-E/ST: Extended Temperature,
1.7V, TSSOP package.
Temperature
Range:
I
E
=
=
-40°C to +85°C
-40°C to +125°C
Package:
P
=
=
=
=
Plastic DIP (300 mil Body), 8-lead
Plastic SOIJ (5.28 mm Body), 8-lead
Plastic SOIC (3.90 mm Body), 8-lead
Plastic TSSOP (4.4 mm Body), 8-lead
SM
SN
ST
2011-2013 Microchip Technology Inc.
DS20002270D-page 29
24AA1026/24LC1026/24FC1026
NOTES:
DS20002270D-page 30
2011-2013 Microchip Technology Inc.
Note the following details of the code protection feature on Microchip devices:
•
Microchip products meet the specification contained in their particular Microchip Data Sheet.
•
Microchip believes that its family of products is one of the most secure families of its kind on the market today, when used in the
intended manner and under normal conditions.
•
There are dishonest and possibly illegal methods used to breach the code protection feature. All of these methods, to our
knowledge, require using the Microchip products in a manner outside the operating specifications contained in Microchip’s Data
Sheets. Most likely, the person doing so is engaged in theft of intellectual property.
•
•
Microchip is willing to work with the customer who is concerned about the integrity of their code.
Neither Microchip nor any other semiconductor manufacturer can guarantee the security of their code. Code protection does not
mean that we are guaranteeing the product as “unbreakable.”
Code protection is constantly evolving. We at Microchip are committed to continuously improving the code protection features of our
products. Attempts to break Microchip’s code protection feature may be a violation of the Digital Millennium Copyright Act. If such acts
allow unauthorized access to your software or other copyrighted work, you may have a right to sue for relief under that Act.
Information contained in this publication regarding device
applications and the like is provided only for your convenience
and may be superseded by updates. It is your responsibility to
ensure that your application meets with your specifications.
MICROCHIP MAKES NO REPRESENTATIONS OR
WARRANTIES OF ANY KIND WHETHER EXPRESS OR
IMPLIED, WRITTEN OR ORAL, STATUTORY OR
OTHERWISE, RELATED TO THE INFORMATION,
INCLUDING BUT NOT LIMITED TO ITS CONDITION,
QUALITY, PERFORMANCE, MERCHANTABILITY OR
FITNESS FOR PURPOSE. Microchip disclaims all liability
arising from this information and its use. Use of Microchip
devices in life support and/or safety applications is entirely at
the buyer’s risk, and the buyer agrees to defend, indemnify and
hold harmless Microchip from any and all damages, claims,
suits, or expenses resulting from such use. No licenses are
conveyed, implicitly or otherwise, under any Microchip
intellectual property rights.
Trademarks
The Microchip name and logo, the Microchip logo, dsPIC,
FlashFlex, KEELOQ, KEELOQ logo, MPLAB, PIC, PICmicro,
PICSTART, PIC logo, rfPIC, SST, SST Logo, SuperFlash
and UNI/O are registered trademarks of Microchip Technology
Incorporated in the U.S.A. and other countries.
32
FilterLab, Hampshire, HI-TECH C, Linear Active Thermistor,
MTP, SEEVAL and The Embedded Control Solutions
Company are registered trademarks of Microchip Technology
Incorporated in the U.S.A.
Silicon Storage Technology is a registered trademark of
Microchip Technology Inc. in other countries.
Analog-for-the-Digital Age, Application Maestro, BodyCom,
chipKIT, chipKIT logo, CodeGuard, dsPICDEM,
dsPICDEM.net, dsPICworks, dsSPEAK, ECAN,
ECONOMONITOR, FanSense, HI-TIDE, In-Circuit Serial
Programming, ICSP, Mindi, MiWi, MPASM, MPF, MPLAB
Certified logo, MPLIB, MPLINK, mTouch, Omniscient Code
Generation, PICC, PICC-18, PICDEM, PICDEM.net, PICkit,
PICtail, REAL ICE, rfLAB, Select Mode, SQI, Serial Quad I/O,
Total Endurance, TSHARC, UniWinDriver, WiperLock, ZENA
and Z-Scale are trademarks of Microchip Technology
Incorporated in the U.S.A. and other countries.
SQTP is a service mark of Microchip Technology Incorporated
in the U.S.A.
GestIC and ULPP are registered trademarks of Microchip
Technology Germany II GmbH & Co. KG, a subsidiary of
Microchip Technology Inc., in other countries.
All other trademarks mentioned herein are property of their
respective companies.
© 2011-2013, Microchip Technology Incorporated, Printed in
the U.S.A., All Rights Reserved.
Printed on recycled paper.
ISBN: 9781620773246
QUALITY MANAGEMENT SYSTEM
CERTIFIED BY DNV
Microchip received ISO/TS-16949:2009 certification for its worldwide
headquarters, design and wafer fabrication facilities in Chandler and
Tempe, Arizona; Gresham, Oregon and design centers in California
and India. The Company’s quality system processes and procedures
are for its PIC® MCUs and dsPIC® DSCs, KEELOQ® code hopping
devices, Serial EEPROMs, microperipherals, nonvolatile memory and
analog products. In addition, Microchip’s quality system for the design
and manufacture of development systems is ISO 9001:2000 certified.
== ISO/TS 16949 ==
2011-2013 Microchip Technology Inc.
DS20002270D-page 31
Worldwide Sales and Service
AMERICAS
ASIA/PACIFIC
ASIA/PACIFIC
EUROPE
Corporate Office
2355 West Chandler Blvd.
Chandler, AZ 85224-6199
Tel: 480-792-7200
Fax: 480-792-7277
Technical Support:
http://www.microchip.com/
support
Asia Pacific Office
Suites 3707-14, 37th Floor
Tower 6, The Gateway
Harbour City, Kowloon
Hong Kong
Tel: 852-2401-1200
Fax: 852-2401-3431
India - Bangalore
Tel: 91-80-3090-4444
Fax: 91-80-3090-4123
Austria - Wels
Tel: 43-7242-2244-39
Fax: 43-7242-2244-393
Denmark - Copenhagen
Tel: 45-4450-2828
Fax: 45-4485-2829
India - New Delhi
Tel: 91-11-4160-8631
Fax: 91-11-4160-8632
France - Paris
Tel: 33-1-69-53-63-20
Fax: 33-1-69-30-90-79
India - Pune
Tel: 91-20-2566-1512
Fax: 91-20-2566-1513
Australia - Sydney
Tel: 61-2-9868-6733
Fax: 61-2-9868-6755
Web Address:
www.microchip.com
Germany - Munich
Tel: 49-89-627-144-0
Fax: 49-89-627-144-44
Japan - Osaka
Tel: 81-6-6152-7160
Fax: 81-6-6152-9310
Atlanta
Duluth, GA
Tel: 678-957-9614
Fax: 678-957-1455
China - Beijing
Tel: 86-10-8569-7000
Fax: 86-10-8528-2104
Italy - Milan
Tel: 39-0331-742611
Fax: 39-0331-466781
Japan - Tokyo
Tel: 81-3-6880- 3770
Fax: 81-3-6880-3771
China - Chengdu
Tel: 86-28-8665-5511
Fax: 86-28-8665-7889
Boston
Westborough, MA
Tel: 774-760-0087
Fax: 774-760-0088
Netherlands - Drunen
Tel: 31-416-690399
Fax: 31-416-690340
Korea - Daegu
Tel: 82-53-744-4301
Fax: 82-53-744-4302
China - Chongqing
Tel: 86-23-8980-9588
Fax: 86-23-8980-9500
Chicago
Itasca, IL
Tel: 630-285-0071
Fax: 630-285-0075
Spain - Madrid
Tel: 34-91-708-08-90
Fax: 34-91-708-08-91
Korea - Seoul
China - Hangzhou
Tel: 86-571-2819-3187
Fax: 86-571-2819-3189
Tel: 82-2-554-7200
Fax: 82-2-558-5932 or
82-2-558-5934
UK - Wokingham
Tel: 44-118-921-5869
Fax: 44-118-921-5820
Cleveland
Independence, OH
Tel: 216-447-0464
Fax: 216-447-0643
China - Hong Kong SAR
Tel: 852-2943-5100
Fax: 852-2401-3431
Malaysia - Kuala Lumpur
Tel: 60-3-6201-9857
Fax: 60-3-6201-9859
Dallas
Addison, TX
Tel: 972-818-7423
Fax: 972-818-2924
China - Nanjing
Tel: 86-25-8473-2460
Fax: 86-25-8473-2470
Malaysia - Penang
Tel: 60-4-227-8870
Fax: 60-4-227-4068
China - Qingdao
Tel: 86-532-8502-7355
Fax: 86-532-8502-7205
Philippines - Manila
Tel: 63-2-634-9065
Fax: 63-2-634-9069
Detroit
Farmington Hills, MI
Tel: 248-538-2250
Fax: 248-538-2260
China - Shanghai
Tel: 86-21-5407-5533
Fax: 86-21-5407-5066
Singapore
Tel: 65-6334-8870
Fax: 65-6334-8850
Indianapolis
Noblesville, IN
Tel: 317-773-8323
Fax: 317-773-5453
China - Shenyang
Tel: 86-24-2334-2829
Fax: 86-24-2334-2393
Taiwan - Hsin Chu
Tel: 886-3-5778-366
Fax: 886-3-5770-955
Los Angeles
China - Shenzhen
Tel: 86-755-8864-2200
Fax: 86-755-8203-1760
Taiwan - Kaohsiung
Tel: 886-7-213-7828
Fax: 886-7-330-9305
Mission Viejo, CA
Tel: 949-462-9523
Fax: 949-462-9608
China - Wuhan
Tel: 86-27-5980-5300
Fax: 86-27-5980-5118
Taiwan - Taipei
Tel: 886-2-2508-8600
Fax: 886-2-2508-0102
Santa Clara
Santa Clara, CA
Tel: 408-961-6444
Fax: 408-961-6445
China - Xian
Tel: 86-29-8833-7252
Fax: 86-29-8833-7256
Thailand - Bangkok
Tel: 66-2-694-1351
Fax: 66-2-694-1350
Toronto
Mississauga, Ontario,
Canada
China - Xiamen
Tel: 905-673-0699
Fax: 905-673-6509
Tel: 86-592-2388138
Fax: 86-592-2388130
China - Zhuhai
Tel: 86-756-3210040
Fax: 86-756-3210049
11/29/12
DS20002270D-page 32
2011-2013 Microchip Technology Inc.
相关型号：
24AA1026T-I/SM
128K X 8 I2C/2-WIRE SERIAL EEPROM, PDSO8, 5.28 MM, ROHS COMPLIANT, PLASTIC, SOIJ-8
MICROCHIP
24AA1026T-I/SN
128K X 8 I2C/2-WIRE SERIAL EEPROM, PDSO8, 3.90 MM, ROHS COMPLIANT, PLASTIC, SOIC-8
MICROCHIP
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