Technical Data Sheet

M24C01/02-W M24C01/02-R
M24C02-F
1-Kbit and 2-Kbit serial I²C bus EEPROMs
Datasheet - production data
Features
• Compatible with all I2C bus modes:
– 400 kHz
– 100 kHz
TSSOP8 (DW)
169 mil width
SO8 (MN)
150 mil width
PDIP8 (BN)(1)
• Memory array:
– 1 Kbit (128 bytes) of EEPROM
– 2 Kbit (256 bytes) of EEPROM
– Page size: 16 bytes
• Single supply voltage:
– M24C01/02-W: 2.5 V to 5.5 V
– M24C01/02-R: 1.8 V to 5.5 V
– M24C02-F: 1.7 V to 5.5 V (full temperature
range) and 1.6 V to 1.7 V (limited
temperature range)
• Write:
– Byte Write within 5 ms
– Page Write within 5 ms
• Operating temperature range: from -40 °C up
to +85 °C
• Random and sequential Read modes
• Write protect of the whole memory array
UFDFPN8
(MC)
1. Not recommended for new designs
September 2013
This is information on a product in full production.
• Enhanced ESD/Latch-Up protection
• More than 4 million Write cycles
• More than 200-year data retention
• Packages:
– RoHS compliant and halogen-free
(ECOPACK®)
DocID024020 Rev 2
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www.st.com
Contents
M24C01/02-W M24C01/02-R M24C02-F
Contents
1
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2
Signal description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.1
Serial Clock (SCL) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.2
Serial Data (SDA) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.3
Chip Enable (E2, E1, E0) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.4
Write Control (WC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.5
VSS (ground) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.6
Supply voltage (VCC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.6.1
Operating supply voltage (VCC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.6.2
Power-up conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.6.3
Device reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.6.4
Power-down conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3
Memory organization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
4
Device operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
5
4.1
Start condition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
4.2
Stop condition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
4.3
Data input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
4.4
Acknowledge bit (ACK) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
4.5
Device addressing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
5.1
5.2
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Write operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
5.1.1
Byte Write . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
5.1.2
Page Write . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
5.1.3
Minimizing Write delays by polling on ACK . . . . . . . . . . . . . . . . . . . . . . 16
Read operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
5.2.1
Random Address Read . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
5.2.2
Current Address Read . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
5.2.3
Sequential Read . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
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Contents
6
Initial delivery state . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
7
Maximum rating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
8
DC and AC parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
9
Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
10
Part numbering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
11
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
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3
List of tables
M24C01/02-W M24C01/02-R M24C02-F
List of tables
Table 1.
Table 2.
Table 3.
Table 4.
Table 5.
Table 6.
Table 7.
Table 8.
Table 9.
Table 10.
Table 11.
Table 12.
Table 13.
Table 14.
Table 15.
Table 16.
Table 17.
Table 18.
Table 19.
Table 20.
Table 21.
Table 22.
Table 23.
4/34
Signal names . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Device select code . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Address byte . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Operating conditions (voltage range W) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Operating conditions (voltage range R) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Operating conditions (voltage range F, for devices identified by process letter T) . . . . . . . 20
Operating conditions (voltage range F, for all other devices) . . . . . . . . . . . . . . . . . . . . . . . 20
AC measurement conditions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Input parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Cycling performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Memory cell data retention . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
DC characteristics (M24C01/02-W, device grade 6). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
DC characteristics (M24C01/02-R, device grade 6) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
DC characteristics (M24C02-F, device grade 6). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
400 kHz AC characteristics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
100 kHz AC characteristics (I2C Standard mode). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
TSSOP8 – 8-lead thin shrink small outline, package mechanical data. . . . . . . . . . . . . . . . 28
SO8N – 8-lead plastic small outline, 150 mils body width, package data. . . . . . . . . . . . . . 29
PDIP8 – 8-pin plastic DIP, 0.25 mm lead frame, package mechanical data. . . . . . . . . . . . 30
UFDFPN8 (MLP8) – package dimensions (UFDFPN: Ultra thin Fine pitch
Dual Flat Package, No lead) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Ordering information scheme . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
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List of figures
List of figures
Figure 1.
Figure 2.
Figure 3.
Figure 4.
Figure 5.
Figure 6.
Figure 7.
Figure 8.
Figure 9.
Figure 10.
Figure 11.
Figure 12.
Figure 13.
Figure 14.
Figure 15.
Logic diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
8-pin package connections, top view . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
I2C bus protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Write mode sequences with WC = 0 (data write enabled) . . . . . . . . . . . . . . . . . . . . . . . . . 14
Write mode sequences with WC = 1 (data write inhibited) . . . . . . . . . . . . . . . . . . . . . . . . . 15
Write cycle polling flowchart using ACK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Read mode sequences . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
AC measurement I/O waveform . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Maximum Rbus value versus bus parasitic capacitance (Cbus) for
an I2C bus at maximum frequency fC = 400 kHz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
AC waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
TSSOP8 – 8-lead thin shrink small outline, package outline . . . . . . . . . . . . . . . . . . . . . . . 28
SO8N – 8-lead plastic small outline, 150 mils body width, package outline . . . . . . . . . . . . 29
PDIP8 – 8-pin plastic DIP, 0.25 mm lead frame, package outline . . . . . . . . . . . . . . . . . . . 30
UFDFPN8 (MLP8) – package outline (UFDFPN: Ultra thin Fine pitch
Dual Flat Package, No lead) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
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5
Description
1
M24C01/02-W M24C01/02-R M24C02-F
Description
The M24C01(C02) is a 1(2)-Kbit I2C-compatible EEPROM (Electrically Erasable
PROgrammable Memory) organized as 128 (256) × 8 bits.
The M24C01/02-W can be accessed with a supply voltage from 2.5 V to 5.5 V, the
M24C01/02-R can be accessed with a supply voltage from 1.8 V to 5.5 V, and the
M24C02-F can be accessed either with a supply voltage from 1.7 V to 5.5 V (over the full
temperature range) or with an extended supply voltage from 1.6 V to 1.7 V if the
temperature is reduced to 0 °C/ 85 °C. All these devices operate with a clock frequency of
400 kHz.
Figure 1. Logic diagram
VCC
3
E0-E2
SDA
M24xxx
SCL
WC
VSS
AI01844f
Table 1. Signal names
Signal name
Function
Direction
E2, E1, E0
Chip Enable
Input
SDA
Serial Data
I/O
SCL
Serial Clock
Input
WC
Write Control
Input
VCC
Supply voltage
-
VSS
Ground
-
Figure 2. 8-pin package connections, top view
E0
E1
E2
VSS
1
2
3
4
8
7
6
5
VCC
WC
SCL
SDA
AI01845f
2. See Section 9: Package mechanical data for package dimensions, and how to identify pin 1.
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Signal description
2
Signal description
2.1
Serial Clock (SCL)
The signal applied on the SCL input is used to strobe the data available on SDA(in) and to
output the data on SDA(out).
2.2
Serial Data (SDA)
SDA is an input/output used to transfer data in or data out of the device. SDA(out) is an
open drain output that may be wire-OR’ed with other open drain or open collector signals on
the bus. A pull-up resistor must be connected from Serial Data (SDA) to VCC (Figure 10
indicates how to calculate the value of the pull-up resistor).
2.3
Chip Enable (E2, E1, E0)
(E2,E1,E0) input signals are used to set the value that is to be looked for on the three least
significant bits (b3, b2, b1) of the 7-bit device select code. These inputs must be tied to VCC
or VSS, as shown in Table 2: Device select code. When not connected (left floating), these
inputs are read as low (0).
2.4
Write Control (WC)
This input signal is useful for protecting the entire contents of the memory from inadvertent
write operations. Write operations are disabled to the entire memory array when Write
Control (WC) is driven high. Write operations are enabled when Write Control (WC) is either
driven low or left floating.
When Write Control (WC) is driven high, device select and address bytes are
acknowledged, Data bytes are not acknowledged.
2.5
VSS (ground)
VSS is the reference for the VCC supply voltage.
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Signal description
M24C01/02-W M24C01/02-R M24C02-F
2.6
Supply voltage (VCC)
2.6.1
Operating supply voltage (VCC)
Prior to selecting the memory and issuing instructions to it, a valid and stable VCC voltage
within the specified [VCC(min), VCC(max)] range must be applied (see Operating conditions
in Section 8: DC and AC parameters). In order to secure a stable DC supply voltage, it is
recommended to decouple the VCC line with a suitable capacitor (usually of the order of
10 nF to 100 nF) close to the VCC/VSS package pins.
This voltage must remain stable and valid until the end of the transmission of the instruction
and, for a write instruction, until the completion of the internal write cycle (tW).
2.6.2
Power-up conditions
The VCC voltage has to rise continuously from 0 V up to the minimum VCC operating voltage
(see Operating conditions in Section 8: DC and AC parameters) and the rise time must not
vary faster than 1 V/µs.
2.6.3
Device reset
In order to prevent inadvertent write operations during power-up, a power-on-reset (POR)
circuit is included.
At power-up, the device does not respond to any instruction until VCC has reached the
internal reset threshold voltage. This threshold is lower than the minimum VCC operating
voltage (see Operating conditions in Section 8: DC and AC parameters). When VCC passes
over the POR threshold, the device is reset and enters the Standby Power mode; however,
the device must not be accessed until VCC reaches a valid and stable DC voltage within the
specified [VCC(min), VCC(max)] range (see Operating conditions in Section 8: DC and AC
parameters).
In a similar way, during power-down (continuous decrease in VCC), the device must not be
accessed when VCC drops below VCC(min). When VCC drops below the threshold voltage,
the device stops responding to any instruction sent to it.
2.6.4
Power-down conditions
During power-down (continuous decrease in VCC), the device must be in the Standby Power
mode (mode reached after decoding a Stop condition, assuming that there is no internal
write cycle in progress).
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Memory organization
The memory is organized as shown below.
Figure 3. Block diagram
WC
E2, E1, E0
High voltage
generator
Control logic
SCL
SDA
I/O shift register
Address register
and counter
Data
register
Y decoder
3
Memory organization
1 page
X decoder
MS30996V1
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Device operation
4
M24C01/02-W M24C01/02-R M24C02-F
Device operation
The device supports the I2C protocol. This is summarized in Figure 4. Any device that sends
data on to the bus is defined to be a transmitter, and any device that reads the data to be a
receiver. The device that controls the data transfer is known as the bus master, and the
other as the slave device. A data transfer can only be initiated by the bus master, which will
also provide the serial clock for synchronization. The device is always a slave in all
communications.
Figure 4. I2C bus protocol
SCL
SDA
SDA
Input
START
Condition
SCL
1
SDA
MSB
2
SDA
Change
STOP
Condition
3
7
8
9
ACK
START
Condition
SCL
1
SDA
MSB
2
3
7
8
9
ACK
STOP
Condition
AI00792B
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4.1
Device operation
Start condition
Start is identified by a falling edge of Serial Data (SDA) while Serial Clock (SCL) is stable in
the high state. A Start condition must precede any data transfer instruction. The device
continuously monitors (except during a Write cycle) Serial Data (SDA) and Serial Clock
(SCL) for a Start condition.
4.2
Stop condition
Stop is identified by a rising edge of Serial Data (SDA) while Serial Clock (SCL) is stable and
driven high. A Stop condition terminates communication between the device and the bus
master. A Read instruction that is followed by NoAck can be followed by a Stop condition to
force the device into the Standby mode.
A Stop condition at the end of a Write instruction triggers the internal Write cycle.
4.3
Data input
During data input, the device samples Serial Data (SDA) on the rising edge of Serial Clock
(SCL). For correct device operation, Serial Data (SDA) must be stable during the rising edge
of Serial Clock (SCL), and the Serial Data (SDA) signal must change only when Serial Clock
(SCL) is driven low.
4.4
Acknowledge bit (ACK)
The acknowledge bit is used to indicate a successful byte transfer. The bus transmitter,
whether it be bus master or slave device, releases Serial Data (SDA) after sending eight bits
of data. During the 9th clock pulse period, the receiver pulls Serial Data (SDA) low to
acknowledge the receipt of the eight data bits.
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Device operation
4.5
M24C01/02-W M24C01/02-R M24C02-F
Device addressing
To start communication between the bus master and the slave device, the bus master must
initiate a Start condition. Following this, the bus master sends the device select code, shown
in Table 2 (on Serial Data (SDA), most significant bit first).
Table 2. Device select code
Device type identifier(1)
Chip Enable address
RW
b7
b6
b5
b4
b3
b2
b1
b0
1
0
1
0
E2
E1
E0
RW
1. The most significant bit, b7, is sent first.
The 8th bit is the Read/Write bit (RW). This bit is set to 1 for Read and 0 for Write operations.
If a match occurs on the device select code, the corresponding device gives an
acknowledgment on Serial Data (SDA) during the 9th bit time. If the device does not match
the device select code, it deselects itself from the bus, and goes into Standby mode.
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5
Instructions
5.1
Write operations
Instructions
Following a Start condition the bus master sends a device select code with the R/W bit (RW)
reset to 0. The device acknowledges this, as shown in Figure 5, and waits for the address
byte. The device responds to each address byte with an acknowledge bit, and then waits for
the data byte.
Table 3. Address byte
A7
A6
A5
A4
A3
A2
A1
A0
When the bus master generates a Stop condition immediately after a data byte Ack bit (in
the “10th bit” time slot), either at the end of a Byte Write or a Page Write, the internal Write
cycle tW is triggered. A Stop condition at any other time slot does not trigger the internal
Write cycle.
After the Stop condition and the successful completion of an internal Write cycle (tW), the
device internal address counter is automatically incremented to point to the next byte after
the last modified byte.
During the internal Write cycle, Serial Data (SDA) is disabled internally, and the device does
not respond to any requests.
If the Write Control input (WC) is driven High, the Write instruction is not executed and the
accompanying data bytes are not acknowledged, as shown in Figure 6.
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Instructions
5.1.1
M24C01/02-W M24C01/02-R M24C02-F
Byte Write
After the device select code and the address byte, the bus master sends one data byte. If
the addressed location is Write-protected, by Write Control (WC) being driven high, the
device replies with NoAck, and the location is not modified. If, instead, the addressed
location is not Write-protected, the device replies with Ack. The bus master terminates the
transfer by generating a Stop condition, as shown in Figure 5.
Figure 5. Write mode sequences with WC = 0 (data write enabled)
WC
ACK
Byte address
ACK
Data in
Stop
Dev Select
Start
Byte Write
ACK
R/W
WC
ACK
Dev Select
Start
Page Write
ACK
Byte address
ACK
Data in 1
ACK
Data in 2
Data in 3
R/W
WC (cont'd)
ACK
Data in N
Stop
Page Write
(cont'd)
ACK
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Page Write
The Page Write mode allows up to 16 bytes to be written in a single Write cycle, provided
that they are all located in the same page in the memory: that is, the most significant
memory address bits, A8/A4, are the same. If more bytes are sent than will fit up to the end
of the page, a “roll-over” occurs, i.e. the bytes exceeding the page end are written on the
same page, from location 0.
The bus master sends from 1 to 16 bytes of data, each of which is acknowledged by the
device if Write Control (WC) is low. If Write Control (WC) is high, the contents of the
addressed memory location are not modified, and each data byte is followed by a NoAck, as
shown in Figure 6. After each transferred byte, the internal page address counter is
incremented.
The transfer is terminated by the bus master generating a Stop condition.
Figure 6. Write mode sequences with WC = 1 (data write inhibited)
WC
ACK
ACK
Byte address
NO ACK
Data in
Stop
Dev select
Start
Byte Write
R/W
WC
ACK
Page Write
Dev select
Start
ACK
Byte address
NO ACK
Data in 1
NO ACK
Data in 2
Data in 3
R/W
WC (cont'd)
NO ACK
Page Write
(cont'd)
NO ACK
Data in N
Stop
5.1.2
Instructions
AI02803d
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33
Instructions
5.1.3
M24C01/02-W M24C01/02-R M24C02-F
Minimizing Write delays by polling on ACK
The maximum Write time (tw) is shown in AC characteristics tables in Section 8: DC and AC
parameters, but the typical time is shorter. To make use of this, a polling sequence can be
used by the bus master.
The sequence, as shown in Figure 7, is:
•
Initial condition: a Write cycle is in progress.
•
Step 1: the bus master issues a Start condition followed by a device select code (the
first byte of the new instruction).
•
Step 2: if the device is busy with the internal Write cycle, no Ack will be returned and
the bus master goes back to Step 1. If the device has terminated the internal Write
cycle, it responds with an Ack, indicating that the device is ready to receive the second
part of the instruction (the first byte of this instruction having been sent during Step 1).
Figure 7. Write cycle polling flowchart using ACK
Write cycle
in progress
Start condition
Device select
with RW = 0
NO
First byte of instruction
with RW = 0 already
decoded by the device
ACK
returned
YES
NO
Next
Operation is
addressing the
memory
YES
Send Address
and Receive ACK
ReStart
Stop
NO
StartCondition
YES
Data for the
Write cperation
Device select
with RW = 1
Continue the
Write operation
Continue the
Random Read operation
AI01847e
AI01847d
16/34
DocID024020 Rev 2
M24C01/02-W M24C01/02-R M24C02-F
Read operations
Read operations are performed independently of the state of the Write Control (WC) signal.
After the successful completion of a Read operation, the device internal address counter is
incremented by one, to point to the next byte address.
For the Read instructions, after each byte read (data out), the device waits for an
acknowledgment (data in) during the 9th bit time. If the bus master does not acknowledge
during this 9th time, the device terminates the data transfer and switches to its Standby
mode.
Figure 8. Read mode sequences
ACK
Data out
Stop
Start
Dev select
NO ACK
R/W
ACK
Start
Dev select *
ACK
Byte address
R/W
ACK
Sequential
Current
Read
Dev select *
NO ACK
Data out
R/W
ACK
ACK
Data out 1
NO ACK
Data out N
Stop
Start
Dev select
R/W
ACK
Dev select *
ACK
Byte address
R/W
ACK
ACK
Dev select *
Start
Sequential
Random
Read
ACK
Start
Random
Address
Read
Stop
Current
Address
Read
Start
ACK
Data out 1
R/W
NO ACK
Data out N
Stop
5.2
Instructions
DocID024020 Rev 2
AI01942b
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33
Initial delivery state
5.2.1
M24C01/02-W M24C01/02-R M24C02-F
Random Address Read
A dummy Write is first performed to load the address into this address counter (as shown in
Figure 8) but without sending a Stop condition. Then, the bus master sends another Start
condition, and repeats the device select code, with the RW bit set to 1. The device
acknowledges this, and outputs the contents of the addressed byte. The bus master must
not acknowledge the byte, and terminates the transfer with a Stop condition.
5.2.2
Current Address Read
For the Current Address Read operation, following a Start condition, the bus master only
sends a device select code with the R/W bit set to 1. The device acknowledges this, and
outputs the byte addressed by the internal address counter. The counter is then
incremented. The bus master terminates the transfer with a Stop condition, as shown in
Figure 8, without acknowledging the byte.
5.2.3
Sequential Read
This operation can be used after a Current Address Read or a Random Address Read. The
bus master does acknowledge the data byte output, and sends additional clock pulses so
that the device continues to output the next byte in sequence. To terminate the stream of
bytes, the bus master must not acknowledge the last byte, and must generate a Stop
condition, as shown in Figure 8.
The output data comes from consecutive addresses, with the internal address counter
automatically incremented after each byte output. After the last memory address, the
address counter “rolls-over”, and the device continues to output data from memory address
00h.
6
Initial delivery state
The device is delivered with all the memory array bits set to 1 (each byte contains FFh).
18/34
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M24C01/02-W M24C01/02-R M24C02-F
7
Maximum rating
Maximum rating
Stressing the device outside the ratings listed in Table 4 may cause permanent damage to
the device. These are stress ratings only, and operation of the device at these, or any other
conditions outside those indicated in the operating sections of this specification, is not
implied. Exposure to absolute maximum rating conditions for extended periods may affect
device reliability.
Table 4. Absolute maximum ratings
Symbol
Parameter
Ambient operating temperature
TSTG
TLEAD
Storage temperature
Min.
Max.
Unit
-
130
°C
150
°C
–65
Lead temperature during soldering
see
note(1)
°C
(2)
°C
PDIP-specific lead temperature during soldering
-
260
IOL
DC output current (SDA = 0)
-
5
mA
VIO
Input or output range
–0.50
6.5
V
VCC
Supply voltage
–0.50
6.5
V
-
3000(4)
V
VESD
Electrostatic pulse (Human Body
model)(3)
1. Compliant with JEDEC Std J-STD-020D (for small body, Sn-Pb or Pb-free assembly), the ST ECOPACK®
7191395 specification, and the European directive on Restrictions of Hazardous Substances (RoHS)
2011/65/EU.
2. TLEAD max must not be applied for more than 10 s.
3. Positive and negative pulses applied on different combinations of pin connections, according to AECQ100-002 (compliant with JEDEC Std JESD22-A114, C1=100 pF, R1=1500 Ω).
4. 4000 V for devices identified by process letters S or G.
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33
DC and AC parameters
8
M24C01/02-W M24C01/02-R M24C02-F
DC and AC parameters
This section summarizes the operating and measurement conditions, and the DC and AC
characteristics of the device.
Table 5. Operating conditions (voltage range W)
Symbol
Min.
Max.
Unit
Supply voltage
2.5
5.5
V
TA
Ambient operating temperature
–40
85
°C
fC
Operating clock frequency
-
400
kHz
Min.
Max.
Unit
Supply voltage
1.8
5.5
V
TA
Ambient operating temperature
–40
85
°C
fC
Operating clock frequency
-
400
kHz
VCC
Parameter
Table 6. Operating conditions (voltage range R)
Symbol
VCC
Parameter
Table 7. Operating conditions (voltage range F,
for devices identified by process letter T)
Symbol
VCC
TA
fC
Parameter
Min.
Max.
Unit
V
Supply voltage
1.60
1.65
1.70
5.5
Ambient operating temperature: READ
-40
-40
-40
85
Ambient operating temperature: WRITE
0
-20
-40
85
Operating clock frequency
-
-
-
400
°C
kHz
Table 8. Operating conditions (voltage range F, for all other devices)
Symbol
Min.
Max.
Unit
Supply voltage
1.7
5.5
V
TA
Ambient operating temperature
-20
85
°C
fC
Operating clock frequency
-
400
kHz
VCC
20/34
Parameter
DocID024020 Rev 2
M24C01/02-W M24C01/02-R M24C02-F
DC and AC parameters
Table 9. AC measurement conditions
Symbol
Cbus
Parameter
Min.
Load capacitance
Max.
Unit
100
SCL input rise/fall time, SDA input fall time
-
pF
50
ns
Input levels
0.2 VCC to 0.8 VCC
V
Input and output timing reference levels
0.3 VCC to 0.7 VCC
V
Figure 9. AC measurement I/O waveform
Input voltage levels
Input and output
Timing reference levels
0.8VCC
0.7VCC
0.3VCC
0.2VCC
MS19774V1
Table 10. Input parameters
Parameter(1)
Symbol
Test condition
Min.
Max.
Unit
CIN
Input capacitance (SDA)
-
-
8
pF
CIN
Input capacitance (other pins)
-
-
6
pF
VIN < 0.3 VCC
15
70
kΩ
VIN > 0.7 VCC
500
-
kΩ
ZL
ZH
Input impedance (WC)
1. Characterized only, not tested in production.
Table 11. Cycling performance
Symbol
Parameter
Test condition(1)
Max.
Ncycle
Write cycle
endurance
TA ≤ 25 °C, VCC(min) < VCC < VCC(max)
4,000,000
TA = 85 °C, VCC(min) < VCC < VCC(max)
1,200,000
Unit
Write cycle
1. Cycling performance for products identified by process letter T.
Table 12. Memory cell data retention
Parameter
Data retention(1)
Test condition
TA = 55 °C
Min.
Unit
200
Year
1. For products identified by process letter T. The data retention behavior is checked in production, while the
200-year limit is defined from characterization and qualification results.
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33
DC and AC parameters
M24C01/02-W M24C01/02-R M24C02-F
Table 13. DC characteristics (M24C01/02-W, device grade 6)
Symbol
Parameter
ILI
Input leakage current
(SCL, SDA, E2, E1)
ILO
Output leakage
current
ICC
Supply current (Read)
ICC0
ICC1
Test conditions (in addition to those
in Table 5 and Table 9)
Min.
Max.
Unit
VIN = VSS or VCC, device in Standby
mode
-
±2
µA
SDA in Hi-Z, external voltage applied
on SDA: VSS or VCC
-
±2
µA
VCC = 5.5 V, fc = 400 kHz
-
1(1)
mA
VCC = 2.5 V, fc = 400 kHz
-
1
mA
Supply current (Write) During tW, 2.5 V ≤ VCC ≤ 5.5 V
-
Device not selected(3),
VIN = VSS or VCC, VCC = 2.5 V
-
2(4)
µA
Device not selected(3),
VIN = VSS or VCC, VCC = 5.5 V
-
3(4)
µA
Standby supply
current
0.5
(2)
VIL
Input low voltage
(SCL, SDA, WC)
-
–0.45
0.3 VCC
V
VIH
Input high voltage
(SCL, SDA, WC)
-
0.7 VCC
VCC +1
V
VOL
Output low voltage
IOL = 2.1 mA, VCC = 2.5 V or
IOL = 3 mA, VCC = 5.5 V
-
0.4
V
1. 2 mA for devices identified by process letter G or S.
2. For devices identified by process letter T, value averaged over tW, characterized only (not tested in
production).
3. The device is not selected after power-up, after a Read instruction (after the Stop condition), or after the
completion of the internal write cycle tW (tW is triggered by the correct decoding of a Write instruction).
4. 1 µA for previous devices identified by process letters G or S.
22/34
mA
DocID024020 Rev 2
M24C01/02-W M24C01/02-R M24C02-F
DC and AC parameters
Table 14. DC characteristics (M24C01/02-R, device grade 6)
Symbol
Test conditions(1) (in addition to
those in Table 6 and Table 9)
Parameter
Min.
Max.
Unit
ILI
Input leakage current
(E2, E1, SCL, SDA)
VIN = VSS or VCC, device in
Standby mode
-
±2
µA
ILO
Output leakage current
SDA in Hi-Z, external voltage
applied on SDA: VSS or VCC
-
±2
µA
ICC
Supply current (Read)
VCC = 1.8 V, fc= 400 kHz
-
0.8
mA
ICC0
Supply current (Write)
During tW, VCC1.8V ≤ VCC < 2.5 V
-
0.5(2)
mA
-
1
µA
2.5 V ≤ VCC
–0.45
0.3 VCC
V
VCC < 2.5 V
–0.45
0.25 VCC
V
Input high voltage
(SCL, SDA)
VCC < 2.5 V
0.75 VCC
6.5
V
Input high voltage
(WC)
VCC < 2.5 V
0.75 VCC VCC+ 0.6
Output low voltage
IOL = 0.7 mA, VCC = 1.8 V
ICC1
Standby supply current
VIL
Input low voltage
(SCL, SDA, WC)
VIH
VOL
selected(3)
Device not
,
VIN = VSS or VCC, VCC = 1.8 V
-
0.2
V
V
1. If the application uses the voltage range R device with 2.5 V ≤ Vcc ≤ 5.5 V and -40 °C < TA < +85 °C,
please refer to Table 13 instead of this table.
2. For devices identified by process letter T, value averaged over tW, characterized only (not tested in
production).
3. The device is not selected after power-up, after a Read instruction (after the Stop condition), or after the
completion of the internal write cycle tW (tW is triggered by the correct decoding of a Write instruction).
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33
DC and AC parameters
M24C01/02-W M24C01/02-R M24C02-F
Table 15. DC characteristics (M24C02-F, device grade 6)
Symbol
Test conditions(1) (in addition to
those in Table 7, Table 8 and
Table 9)
Parameter
Min.
Max.
Unit
ILI
Input leakage current
(E2,E1, SCL, SDA)
VIN = VSS or VCC, device in
Standby mode
-
±2
µA
ILO
Output leakage current
VOUT = VSS or VCC, SDA in Hi-Z,
-
±2
µA
ICC
Supply current (Read)
VCC = 1.6 V(2) or 1.7 V,
fc= 400 kHz
-
0.8
mA
ICC0
Supply current (Write)
During tW, VCC ≤ 1.8 V
-
0.5(3)
mA
-
1
µA
2.5 V ≤ VCC
–0.45
0.3 VCC
V
VCC < 2.5 V
–0.45
0.25 VCC
V
Input high voltage
(SCL, SDA)
VCC < 2.5 V
0.75 VCC
6.5
V
Input high voltage
(WC)
VCC < 2.5 V
0.75 VCC VCC+0.6
Output low voltage
IOL = 0.7 mA, VCC ≤ 1.8 V
ICC1
Standby supply current
VIL
Input low voltage
(SCL, SDA, WC)
VIH
VOL
(4),
Device not selected
VIN = VSS or VCC, VCC ≤ 1.8 V
-
0.2
V
V
1. If the application uses the voltage range F device with 2.5 V ≤ Vcc ≤ 5.5 V , please refer to Table 13 instead
of this table.
2. 1.6 V for devices identified by process letter T.
3. For devices identified by process letter T, value averaged over tW, characterized only (not tested in
production).
4. The device is not selected after power-up, after a Read instruction (after the Stop condition), or after the
completion of the internal write cycle tW (tW is triggered by the correct decoding of a Write instruction).
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M24C01/02-W M24C01/02-R M24C02-F
DC and AC parameters
Table 16. 400 kHz AC characteristics
Symbol
Alt.
fC
fSCL
Clock frequency
tCHCL
tHIGH
tCLCH
tLOW
tQL1QL2(1)
tF
tXH1XH2
tR
Parameter
Min.
Max.
Unit
-
400
kHz
Clock pulse width high
600
-
ns
Clock pulse width low
1300
-
ns
SDA (out) fall time
20(2)
300
ns
Input signal rise time
(3)
(3)
ns
(3)
(3)
ns
100
-
ns
0
-
ns
100
-
ns
-
900
ns
tXL1XL2
tF
Input signal fall time
tDXCX
tSU:DAT
Data in set up time
tCLDX
tHD:DAT
Data in hold time
tCLQX
(4)
tDH
Data out hold time
tCLQV
(5)
tAA
Clock low to next data valid (access time)
tCHDL
tSU:STA
Start condition setup time
600
-
ns
tDLCL
tHD:STA
Start condition hold time
600
-
ns
tCHDH
tSU:STO
Stop condition set up time
600
-
ns
tDHDL
tBUF
Time between Stop condition and next Start
condition
1300
-
ns
tW
tWR
Write time
-
5
ms
Pulse width ignored (input filter on SCL and
SDA) - single glitch
-
100
ns
tNS(1)
1. Characterized only, not tested in production.
2. With CL = 10 pF.
3. There is no min. or max. values for the input signal rise and fall times. It is however recommended by the
I²C specification that the input signal rise and fall times be more than 20 ns and less than 300 ns when
fC < 400 kHz.
4. The min value for tCLQX (Data out hold time) of the M24xxx devices offers a safe timing to bridge the
undefined region of the falling edge SCL.
5. tCLQV is the time (from the falling edge of SCL) required by the SDA bus line to reach either 0.3 VCC or
0.7 VCC, assuming that Rbus × Cbus time constant is within the values specified in Figure 10.
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33
DC and AC parameters
M24C01/02-W M24C01/02-R M24C02-F
Table 17. 100 kHz AC characteristics (I2C Standard mode)(1)
Symbol
Alt.
fC
fSCL
tCHCL
Parameter
Min.
Max.
Unit
Clock frequency
-
100
kHz
tHIGH
Clock pulse width high
4
-
µs
tCLCH
tLOW
Clock pulse width low
4.7
-
µs
tXH1XH2
tR
Input signal rise time
-
1
µs
tXL1XL2
tF
Input signal fall time
-
300
ns
tQL1QL2(2)
tF
SDA fall time
-
300
ns
tDXCX
tSU:DAT Data in setup time
250
-
ns
tCLDX
tHD:DAT Data in hold time
0
-
ns
200
-
ns
-
3450
ns
tSU:STA Start condition setup time
4.7
-
µs
tDLCL
tHD:STA Start condition hold time
4
-
µs
tCHDH
tSU:STO Stop condition setup time
4
-
µs
4.7
-
µs
tCLQX(3)
tDH
Data out hold time
tCLQV(4)
tAA
Clock low to next data valid (access time)
tCHDL
(5)
tDHDL
tBUF
Time between Stop condition and next Start
condition
tW
tWR
Write time
-
5
ms
Pulse width ignored (input filter on SCL and
SDA), single glitch
-
100
ns
tNS(2)
1. Values recommended by the I2C bus Standard-mode specification for a robust design of the I2C bus
application. Note that the M24xxx devices decode correctly faster timings as specified in Table 16: 400 kHz
AC characteristics.
2. Characterized only.
3. To avoid spurious Start and Stop conditions, a minimum delay is placed between SCL=1 and the falling or
rising edge of SDA.
4. tCLQV is the time (from the falling edge of SCL) required by the SDA bus line to reach either 0.3 VCC or
0.7 VCC, assuming that Rbus × Cbus time constant is within the values specified in Figure 10.
5. For a reStart condition, or following a Write cycle.
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M24C01/02-W M24C01/02-R M24C02-F
DC and AC parameters
Figure 10. Maximum Rbus value versus bus parasitic capacitance (Cbus) for
an I2C bus at maximum frequency fC = 400 kHz
Bus line pull-up resistor
(k )
100
The R bus x Cbustime constant
must be below the 400 ns
time constant line represented
on the left.
R
bu
s ×
C
bu
s =
Here Rbus × Cbus = 120 ns
40
10
VCC
Rbus
0n
4k
s
I²C bus
master
SCL
M24xxx
SDA
1
30 pF
10
100
Bus line capacitor (pF)
Cbus
1000
ai14796b
Figure 11. AC waveforms
Start
condition
Stop
condition
tXL1XL2
Start
condition
tCHCL
tXH1XH2
tCLCH
SCL
tDLCL
tXL1XL2
SDA In
tCHDL
tXH1XH2
SDA
Input
tDXCH
SDA
Change
tCLDX
tCHDH
tDHDL
WC
tDHWH
tWLDL
Stop
condition
Start
condition
SCL
SDA In
tW
tCHDH
tCHDL
Write cycle
tCHCL
SCL
tCLQV
SDA Out
tCLQX
Data valid
Data valid
DocID024020 Rev 2
tQL1QL2
AI00795i
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33
Package mechanical data
9
M24C01/02-W M24C01/02-R M24C02-F
Package mechanical data
In order to meet environmental requirements, ST offers these devices in different grades of
ECOPACK® packages, depending on their level of environmental compliance. ECOPACK®
specifications, grade definitions and product status are available at: www.st.com.
ECOPACK® is an ST trademark.
Figure 12. TSSOP8 – 8-lead thin shrink small outline, package outline
1. Drawing is not to scale.
Table 18. TSSOP8 – 8-lead thin shrink small outline, package mechanical data
inches(1)
millimeters
Symbol
Typ.
Min.
Max.
Typ.
Min.
Max.
A
–
–
1.200
–
–
0.0472
A1
–
0.050
0.150
–
0.0020
0.0059
A2
1.000
0.800
1.050
0.0394
0.0315
0.0413
b
–
0.190
0.300
–
0.0075
0.0118
c
–
0.090
0.200
–
0.0035
0.0079
CP
–
–
0.100
–
–
0.0039
D
3.000
2.900
3.100
0.1181
0.1142
0.1220
e
0.650
–
–
0.0256
–
–
E
6.400
6.200
6.600
0.2520
0.2441
0.2598
E1
4.400
4.300
4.500
0.1732
0.1693
0.1772
L
0.600
0.450
0.750
0.0236
0.0177
0.0295
L1
1.000
–
–
0.0394
–
–
α
–
0°
8°
–
0°
8°
1. Values in inches are converted from mm and rounded to four decimal digits.
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M24C01/02-W M24C01/02-R M24C02-F
Package mechanical data
Figure 13. SO8N – 8-lead plastic small outline, 150 mils body width, package outline
h x 45°
A2
A
c
ccc
b
e
0.25 mm
GAUGE PLANE
D
k
8
E1
E
1
L
A1
L1
SO-A
1. Drawing is not to scale.
Table 19. SO8N – 8-lead plastic small outline, 150 mils body width, package data
inches (1)
millimeters
Symbol
Typ
Min
Max
Typ
Min
Max
A
–
–
1.750
–
–
0.0689
A1
–
0.100
0.250
–
0.0039
0.0098
A2
–
1.250
–
–
0.0492
–
b
–
0.280
0.480
–
0.0110
0.0189
c
–
0.170
0.230
–
0.0067
0.0091
ccc
–
–
0.100
–
–
0.0039
D
4.900
4.800
5.000
0.1929
0.1890
0.1969
E
6.000
5.800
6.200
0.2362
0.2283
0.2441
E1
3.900
3.800
4.000
0.1535
0.1496
0.1575
e
1.270
–
–
0.0500
–
–
h
–
0.250
0.500
–
0.0098
0.0197
k
–
0°
8°
–
0°
8°
L
–
0.400
1.270
–
0.0157
0.0500
L1
1.040
–
–
0.0409
–
–
1. Values in inches are converted from mm and rounded to four decimal digits.
DocID024020 Rev 2
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33
Package mechanical data
M24C01/02-W M24C01/02-R M24C02-F
Figure 14. PDIP8 – 8-pin plastic DIP, 0.25 mm lead frame, package outline
E
b2
A2
A1
b
A
L
c
e
eA
eB
D
8
E1
1
PDIP-B
1. Drawing is not to scale.
2. Not recommended for new designs.
Table 20. PDIP8 – 8-pin plastic DIP, 0.25 mm lead frame, package mechanical data
inches(1)
millimeters
Symbol
Typ.
Min.
Max.
Typ.
Min.
Max.
A
–
–
5.33
–
–
0.2098
A1
–
0.38
–
–
0.0150
–
A2
3.30
2.92
4.95
0.1299
0.1150
0.1949
b
0.46
0.36
0.56
0.0181
0.0142
0.0220
b2
1.52
1.14
1.78
0.0598
0.0449
0.0701
c
0.25
0.20
0.36
0.0098
0.0079
0.0142
D
9.27
9.02
10.16
0.3650
0.3551
0.4000
E
7.87
7.62
8.26
0.3098
0.3000
0.3252
E1
6.35
6.10
7.11
0.2500
0.2402
0.2799
e
2.54
–
–
0.1000
–
–
eA
7.62
–
–
0.3000
–
–
eB
–
–
10.92
–
–
0.4299
L
3.30
2.92
3.81
0.1299
0.1150
0.1500
1. Values in inches are converted from mm and rounded to four decimal digits.
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M24C01/02-W M24C01/02-R M24C02-F
Package mechanical data
Figure 15. UFDFPN8 (MLP8) – package outline (UFDFPN: Ultra thin Fine pitch
Dual Flat Package, No lead)
D
e
MC
b
L1
L3
Pin 1
E
E2
K
L
A
D2
eee
A1
ZW_MEeV2
1. Drawing is not to scale.
2. The central pad (area E2 by D2 in the above illustration) is internally pulled to VSS. It must not be
connected to any other voltage or signal line on the PCB, for example during the soldering process.
Table 21. UFDFPN8 (MLP8) – package dimensions (UFDFPN: Ultra thin Fine pitch
Dual Flat Package, No lead)
inches(1)
millimeters
Symbol
Typ
Min
Max
Typ
Min
Max
A
0.550
0.450
0.600
0.0217
0.0177
0.0236
A1
0.020
0.000
0.050
0.0008
0.0000
0.0020
b
0.250
0.200
0.300
0.0098
0.0079
0.0118
D
2.000
1.900
2.100
0.0787
0.0748
0.0827
D2 (rev MC)
–
1.200
1.600
–
0.0472
0.0630
E
3.000
2.900
3.100
0.1181
0.1142
0.1220
E2 (rev MC)
–
1.200
1.600
–
0.0472
0.0630
e
0.500
–
–
0.0197
–
–
K (rev MC)
–
0.300
–
–
0.0118
–
L
–
0.300
0.500
–
0.0118
0.0197
L1
–
–
0.150
–
–
0.0059
L3
–
0.300
–
–
0.0118
–
eee(2)
–
0.080
–
–
0.0031
–
1. Values in inches are converted from mm and rounded to four decimal digits.
2. Applied for exposed die paddle and terminals. Exclude embedding part of exposed die paddle from
measuring.
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33
Part numbering
10
M24C01/02-W M24C01/02-R M24C02-F
Part numbering
Table 22. Ordering information scheme
Example:
M24C02
Device type
M24 = I2C serial access EEPROM
Device function
C01 = 1 Kbit (128 x 8 bit)
C02 = 2 Kbit (256 x 8 bit)
Operating voltage
W = VCC = 2.5 V to 5.5 V
R = VCC = 1.8 V to 5.5 V
F = VCC = 1.6 V or 1.7 V to 5.5 V
Package
BN = PDIP8(1)(2)
MN = SO8 (150 mil width)(3)
DW = TSSOP8 (169 mil width)(3)
MC = UFDFPN8 (MLP8)(3)
Device grade
6 = Industrial: device tested with standard test flow over –40 to 85 °C
Option
blank = standard packing
T = Tape and reel packing
Plating technology
P or G = ECOPACK® (RoHS compliant)
1. RoHS-compliant (ECOPACK1®)
2. Not recommended for new designs.
3. RoHS-compliant and halogen-free (ECOPACK2®)
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W MC 6
T
P
M24C01/02-W M24C01/02-R M24C02-F
11
Revision history
Revision history
Table 23. Document revision history
Date
17-Dec-2012
24-Sep-2013
Revision
Changes
1
New M24C01/02 datasheet resulting from splitting the previous
datasheet M24C08-x M24C04-x M24C02-x M24C01-x (revision 18)
into separate datasheets.
Added part number M24C02-F.
Updated ESD value in Table 4.
Updated standby supply current values (ICCI) in Table 13, Table 14
and Table 15.
2
Added:
– Table 11: Cycling performance
– Table 7: Operating conditions (voltage range F, for devices
identified by process letter T) and Table 8: Operating conditions
(voltage range F, for all other devices)
Updated:
– Features: supply voltage, write cycles and data retention
– Section 1: Description
– Note (1) under Table 4: Absolute maximum ratings
– Table 12: Memory cell data retention, Table 13: DC characteristics
(M24C01/02-W, device grade 6), Table 14: DC characteristics
(M24C01/02-R, device grade 6), Table 15: DC characteristics
(M24C02-F, device grade 6), Table 22: Ordering information
scheme
– Figure 11: AC waveforms
Renamed Figure 15 and Table 21.
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M24C01/02-W M24C01/02-R M24C02-F
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