S-24C02B (Seiko)
2-WIRE CMOS SERIAL E2PROM

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Rev.3.2_00
2-WIRE CMOS SERIAL E2PROM
S-24C01B/02B/04B
The S-24C01B/02B/04B is a 2-wired, low power and
wide range operation 1k bit, 2k bit, 4k bit E2PROM
organized as 128 words × 8 bits, 256 words × 8 bits,
and 512 words × 8 bits in each.
Page write and sequential read are available.
„ Features
Low power consumption Standby : 1.0 µA Max. (VCC=5.5 V)
Oprating : 0.8 mA Max. (VCC=5.5 V)
0.3 mA Max. (Vcc=3.3 V)
Wide operating voltage range :
2.0 to 5.5
Page write :
8 bytes / page (S-24C01B/02B)
16 bytes / page (S-24C04B)
Sequential read
Operating Frequency :
Endurance :
400 kHz (VCC=5 V±10 %)
106 cycles/word
Data retention :
10 years
Write protection
S-24C01B : 100%
S-24C02B/04B : 50%
S-24C01B :
1k bit
S-24C02B :
2k bit
S-24C04B :
4k bit
„ Package
Package name
Package
Drawing code
Tape
8-Pin DIP
DP008-A
8-Pin SOP(JEDEC)
FJ008-A
FJ008-D
8-Pin MSOP
FN008-A
FN008-A
Remark For details, please refer to “Product Code Structure”.
Reel
FJ008-D
FN008-A
Caution This product is intended to use in general electronic devices such as consumer electronics,
office equipment, and communications devices. Before using the product in medical
equipment or automobile equipment including car audio, keyless entry and engine control
unit, contact to SII is indispensable.
Seiko Instruments Inc.
1


S-24C02B (Seiko)
2-WIRE CMOS SERIAL E2PROM

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2-WIRE CMOS SERIAL E2PROM
S-24C01B/02B/04B
Rev.3.2_00
„ Pin Assignment
8-Pin DIP
Top view
NC
NC
NC
GND
1
2
3
4
8 VCC
7 WP
6 SCL
5 SDA
Figure 1
S-24C01BDP
S-24C02BDP
S-24C04BDP
Table 1
Pin No. Symbol
Description
1 NC No Connection1
2 NC No Connection1
3 NC No Connection1
4
GND
Ground
5
SDA
Serial data input/output
6 SCL Serial clock input
Write Protection pin
7 WP Connected to Vcc: Protection valid
Connected to GND: Protection invalid
8
VCC
Power supply
1. Connect to GND or Vcc.
Remark See Dimensions for details of the package drawings.
8-Pin SOP(JEDEC)
Top view
NC 1 8 VCC
NC 2 7 WP
NC 3 6 SCL
GND 4 5 SDA
Figure 2
S-24C01BFJ
S-24C02BFJ
S-24C04BFJ
Table 2
Pin No. Symbol
Description
1 NC No Connection1
2 NC No Connection1
3 NC No Connection1
4
GND
Ground
5
SDA
Serial data input/output
6
SCL
Serial clock input
Write Protection pin
7 WP Connected to Vcc: Protection valid
Connected to GND: Protection invalid
8
VCC
Power supply
1. Connect to GND or Vcc.
Remark See Dimensions for details of the package drawings.
2 Seiko instruments inc.


S-24C02B (Seiko)
2-WIRE CMOS SERIAL E2PROM

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Rev.3.2_00
2-WIRE CMOS SERIAL E2PROM
S-24C01B/02B/04B
8-Pin MSOP
Top view
VCC
WP
SCL
SDA
1
2
3
4
8
7
6
5
NC
NC
NC
GND
Figure 3
S-24C01BMFN
S-24C02BMFN
S-24C04BMFN
Table 3
Pin No. Symbol
Description
8 NC No Connection1
7 NC No Connection1
6 NC No Connection1
5
GND
Ground
4
SDA
Serial data input/output
3 SCL Serial clock input
Write Protection pin
2 WP Connected to Vcc: Protection valid
Connected to GND: Protection invalid
1
VCC
Power supply
1. Connect to GND or Vcc.
Remark See Dimensions for details of the package drawings.
Seiko Instruments Inc.
3


S-24C02B (Seiko)
2-WIRE CMOS SERIAL E2PROM

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2-WIRE CMOS SERIAL E2PROM
S-24C01B/02B/04B
„ Block Diagram
SCL
SDA
Start / Stop
Detector
Serial Clock
Controller
LOAD
Device Address
Comparator
COMP
LOAD
INC
R/W
Address
Counter
Y Decoder
DIN
DOUT
Figure 4
Rev.3.2_00
WP VCC
GND
High-Voltage Generator
Data Register
X Decoder
E2PROM
Selector
Data Output
ACK Output
Controller
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S-24C02B (Seiko)
2-WIRE CMOS SERIAL E2PROM

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Rev.3.2_00
2-WIRE CMOS SERIAL E2PROM
S-24C01B/02B/04B
„ Absolute Maximum Ratings
Table 4
Parameter
Symbol
Ratings
Unit
Power supply voltage
VCC
0.3 to +7.0
V
Input voltage
VIN 0.3 to VCC+0.3
Output voltage
VOUT
0.3 to VCC
Operating ambient temperature
Topr
40 to +85
°C
Storage temperature
Tstg
65 to +150
°C
Caution The absolute maximum ratings are rated values exceeding which the
product could suffer physical damage. These values must therefore
not be exceeded under any condition.
„ Recommended Operating Conditions
Parameter
Power supply voltage
High level input voltage
Low level input voltage
Symbol
VCC
VIH
VIL
Table 5
Conditions
VCC=2.5 to 5.5 V
VCC=2.0 to 2.5 V
VCC=2.5 to 5.5 V
VCC=2.0 to 2.5 V
Min.
2.0
0.7×VCC
0.8×VCC
0.0
0.0
Typ.
Max.
5.5
VCC
VCC
0.3×VCC
0.2×VCC
Unit
V
„ Pin Capacitance
Parameter
Input capacitance
Input/output capacitance
Symbol
CIN
CI/O
Table 6
Conditions
VIN=0 V (SCL, WP)
VI/O=0 V (SDA)
(Ta=25 °C, f=1.0 MHz, Vcc=5 V)
Min. Typ. Max. Unit
− − 10 pF
− − 10 pF
„ Endurance
Parameter
Endurance
Symbol
NW
Table 7
Operating temperatrue
40 to +85 °C
Min.
106
Typ. Max.
Unit
− − cycles/word
Seiko Instruments Inc.
5


S-24C02B (Seiko)
2-WIRE CMOS SERIAL E2PROM

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2-WIRE CMOS SERIAL E2PROM
S-24C01B/02B/04B
Rev.3.2_00
„ DC Electrical Characteristics
Parameter
Current consumption
(READ)
Current consumption
(PROGRAM)
Symbol
ICC1
ICC2
Conditions
Table 8
Vcc=4.5 to 5.5 V
VCC=2.5 to 4.5 V
Min. Typ. Max. Min. Typ. Max.
− − 0.8 − − 0.3
− − 4.0 − − 1.5
VCC=2.0 to 2.5 V
Min. Typ. Max.
− − 0.2
− − 1.5
Unit
mA
mA
Parameter
Standby current
consumption
Input leakage current
Output leakage current
Low level output voltage
Current address hold voltage
Symbol
ISB
ILI
ILO
VOL
VAH
Conditions
VIN=VCC or GND
VIN=GND to VCC
VOUT=GND to VCC
IOL=3.2 mA
IOL=1.5 mA
Table 9
VCC=4.5 to 5.5 V
Min. Typ. Max.
− − 1.0
0.1 1.0
0.1 1.0
− − 0.4
− − 0.3
1.5 5.5
VCC=2.5 to 4.5 V
Min. Typ. Max.
− − 0.6
0.1 1.0
0.1 1.0
− − 0.4
− − 0.3
1.5 4.5
VCC=2.0 to 2.5 V
Min. Typ. Max.
Unit
− − 0.4 µA
0.1 1.0 µA
0.1 1.0 µA
− − −V
− − 0.5 V
1.5 2.5 V
6 Seiko instruments inc.


S-24C02B (Seiko)
2-WIRE CMOS SERIAL E2PROM

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Rev.3.2_00
„ AC Electrical Characteristics
Table 10 Measurement Conditions
Input pulse voltage
0.1×VCC to 0.9×VCC
Input pulse rising/falling time 20 ns
Output judgment voltage
Output load
0.5×VCC
100 pF+ Pullup resistance 1.0 k
2-WIRE CMOS SERIAL E2PROM
S-24C01B/02B/04B
SDA
VCC
R=1.0 k
C=100 pF
Parameter
SCL clock frequency
SCL clock time “L”
SCL clock time “H”
SDA output delay time
SDA output hold time
Start condition setup time
Start condition hold time
Data input setup time
Data input hold time
Stop condition setup time
SCL SDA rising time
SCL SDA falling time
Bus release time
Noise suppression time
SCL
tSU.STA
SDA IN
SDA OUT
Symbol
fSCL
tLOW
tHIGH
tAA
tDH
tSU.STA
tHD.STA
tSU.DAT
tHD.DAT
tSU.STO
tR
tF
tBUF
tI
Table 11
VCC=4.5 to 5.5 V
Min. Typ. Max.
0 400
1.0
0.9
0.1 0.9
50
0.6
0.6
100
0−−
0.6
− − 0.3
− − 0.3
1.3
− − 50
Figure 5 Output Load Circuit
VCC=2.0 to 4.5 V
Min. Typ. Max.
0 100
4.7
4.0
0.1 3.5
100
4.7
4.0
200
0−−
4.7
− − 1.0
− − 0.3
4.7
− − 100
Unit
kHz
µs
µs
µs
ns
µs
µs
ns
ns
µs
µs
µs
µs
ns
tF tHIGH
tLOW
tR
tHD.STA tHD.DAT
tSU.DAT
tSU.STO
tAA tDH
tBUF
Figure 6 Bus Timing
Seiko Instruments Inc.
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S-24C02B (Seiko)
2-WIRE CMOS SERIAL E2PROM

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2-WIRE CMOS SERIAL E2PROM
S-24C01B/02B/04B
Item
Write time
Symbol
tWR
Table 12
Min. Typ.
4.0
Rev.3.2_00
Max.
10.0
Unit
ms
tWR
SCL
SDA
D0
Write data
Acknowledge
Stop Condition
Start Condition
Figure 7 Write Cycle Timing
8 Seiko instruments inc.


S-24C02B (Seiko)
2-WIRE CMOS SERIAL E2PROM

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Rev.3.2_00
2-WIRE CMOS SERIAL E2PROM
S-24C01B/02B/04B
„ Pin Functions
1. SDA (Serial Data Input/Output) Pin
The SDA pin is used for bilateral transmission of serial data. It consists of a signal input pin and an Nch
open-drain transistor output pin.
Usually pull up the SDA line via resistance to the VCC, and use it with other open-drain or open-collector
output devices connected in a wired OR configuration.
2. SCL (Serial Clock Input) Pin
The SCL pin is used for serial clock input. It is capable of processing signals at the rising and falling
edges of the SCL clock input signal. Make sure the rising time and falling time conform to the
specifications.
3. WP Pin
The WP pin is used for write protection. When there is no need for write protection, connect the pin to
the GND; when there is a need for write protection, connect the pin to the Vcc.
Remark Please refer to the Application Note “TIPS,TRICKS AND TRAPS WHEN USING THE
S-24C/24CS SERIES” for equivalent circuit of each pin.
Seiko Instruments Inc.
9


S-24C02B (Seiko)
2-WIRE CMOS SERIAL E2PROM

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2-WIRE CMOS SERIAL E2PROM
S-24C01B/02B/04B
Rev.3.2_00
„ Operation
1. Start Condition
When the SCL line is “H” the SDA line changes from “H” to “L”. This allows the device to go to the start
condition.
All operations begin from the start condition.
2. Stop Condition
When the SCL line is “H” the SDA line changes from “L” to “H”. This allows the device to go to the stop
condition.
When the device receives the stop condition signal during a read sequence, the read operation is
interrupted, and the device goes to standby mode.
When the device receives the stop condition signal during write sequence, the retrieval of write data is
halted, and the E2PROM initiates rewrite.
tSU.STA tHD.STA
tSU.STO
SCL
SDA
Start Condition
Stop Condition
Figure 8 Start/Stop Condition
10 Seiko instruments inc.


S-24C02B (Seiko)
2-WIRE CMOS SERIAL E2PROM

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Rev.3.2_00
2-WIRE CMOS SERIAL E2PROM
S-24C01B/02B/04B
3. Data Transmission
Changing the SDA line while the SCL line is “L” allows the data to be transmitted. A start or stop condition is
recognized when the SDA line changes while the SCL line is “H”.
tSU.DAT
tHD.DAT
SCL
SDA
Figure 9 Data Transmission Timing
4. Acknowledgment
The unit of data transmission is 8 bits. By turning the SDA line “L” the slave device mounted on the system
bus which receives the data during the 9th clock cycle outputs the acknowledgment signal verifying the data
reception. When the E2PROM is rewriting, the device does not output the acknowledgment signal.
SCL
(E2PROM Input)
SDA
(Master Output)
1
89
SDA
(E2PROM Output) Start Condition
Acknowledge
Output
tAA tDH
Figure 10 Acknowledge Output Timing
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S-24C02B (Seiko)
2-WIRE CMOS SERIAL E2PROM

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2-WIRE CMOS SERIAL E2PROM
S-24C01B/02B/04B
Rev.3.2_00
5. Device Addressing
To perform data communications, the master device mounted on the system outputs the start condition signal
to the slave device. Next, the master device outputs 7-bit length device address and a 1-bit length read/write
instruction code onto the SDA bus.
Upper 4 bits of the device address are called the “Device Code”, and set to “1010”. Successive 3 bits are
“don’t care” bits.
When the comparison results match, the slave device outputs the acknowledgment signal during the 9th clock
cycle.
Device Code
Don’t care
S-24C01B/02B 1 0 1 0 X X X R/W
MSB
Device Code
Slave / Page
Address
LSB
S-24C04B
1 0 1 0X X
MSB
Figure 11 Device Address
P0 R/W
LSB
In the S-24C04B, 7th bit becomes “P0”. “P0” is a page address bit and is equivalent to an additional
uppermost bit of the word address. Accordingly, when P0=”0”, the former half area corresponding to 2 k bits
(addresses from 000h to 0FFh) in the entire memory are selected; when P0=”1”, the latter half area
corresponding to 2 k bits (addresses from 100h to 1FFh) in all areas of the memory are selected.
12 Seiko instruments inc.


S-24C02B (Seiko)
2-WIRE CMOS SERIAL E2PROM

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Rev.3.2_00
2-WIRE CMOS SERIAL E2PROM
S-24C01B/02B/04B
6. Write
6.1 Byte Write
When the E2PROM receives a 7-bit length device address and a 1-bit read/write instruction code “0”,
following the start condition signal, it outputs the acknowledgment signal. Next, when the E2PROM receives
an 8-bit length word address, it outputs the acknowledgment signal.
After the E2PROM receives 8-bit write data and outputs the acknowledgment signal, it receives the stop
condition signal. Next, the E2PROM at the specified memory address starts to rewrite.
When the E2PROM is rewriting, all operations are prohibited and the acknowledgment signal is not output.
SW
TR
AI
R
DEVICE
T
T
ADDRESS E
WORD ADDRESS
DATA
S
T
O
P
SDA LINE
1 0 1 0 X X P0 0
W7 W6 W5 W4 W3 W2 W1 W0 D7 D6 D5 D4 D3 D2 D1 D0
M L RA
S S /C
B B WK
AA
CC
KK
Remark1. W7 is optional in the S-24C01B.
2. P0 is ‘don’t care’ in the S-24C01B/02B.
ADR INC
(ADDRESS INCREMENT)
Figure 12 Byte Write
Seiko Instruments Inc.
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S-24C02B (Seiko)
2-WIRE CMOS SERIAL E2PROM

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2-WIRE CMOS SERIAL E2PROM
S-24C01B/02B/04B
Rev.3.2_00
6.2 Page Write
Up to 8 bytes per page can be written in the S-24C01/02B.
Up to 16 bytes per page can be written in the S-24C04B.
Basic data transmission procedures are the same as those in the “Byte Write”. However, when the E2PROM
receives 8-bit write data which corresponds to the page size, the page can be written.
When the E2PROM receives a 7-bit length device address and a 1-bit read/write instruction code “0”,
following the start condition signal, it outputs the acknowledgment signal. When the E2PROM receives an
8-bit length word address, it outputs the acknowledgment signal.
After the E2PROM receives 8-bit write data and outputs the acknowledgment signal, it receives 8-bit write
data corresponding to the next word address, and outputs the acknowledgment signal. The E2PROM
repeats reception of 8-bit write data and output of the acknowledgment signal in succession. It is capable of
receiving write data corresponding to the maximum page size.
When the E2PROM receives the stop condition signal, it starts to rewrite, corresponding to the size of the
page, on which write data, starting from the specified memory address, is received.
SDA
LINE
SW
TR
A
R
T
DEVICE
ADDRESS
I
T
E WORD ADDRESS (n)
DATA (n)
DATA (n+1)
1 0 1 0 X X P0 0
W7 W6 W5 W4 W3 W2 W1 W0
D7 D6 D5 D4 D3 D2 D1 D0
D7
M LRA A A
S S/C C C
B B WK K K
D0 D7
A
C
K
Remark.1. W7 is optional in the S-24C01B.
2. P0 is ‘don’t care’ in the S-24C01B/02B.
ADR INC
ADR INC
DATA (n+x)
S
T
O
P
D0
A
C
K
ADR INC
Figure 13 Page Write
In the S-24C01/02B, the lower 3 bits of the word address are automatically incremented each when the
E2PROM receives 8-bit write data.
Even if the write data exceeds 8 bytes, the upper 5 bits at the word address remain unchanged, the lower 3
bits are rolled over and overwritten.
In the S-24C04B, the lower 4 bits at the word address are automatically incremented each when the E2PROM
receives 8-bit write data.
Even when the write data exceeds 16 bytes, the upper 4 bits of the word address and page address P0
remain unchanged, and the lower 4 bits are rolled over and overwritten.
14 Seiko instruments inc.


S-24C02B (Seiko)
2-WIRE CMOS SERIAL E2PROM

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Rev.3.2_00
2-WIRE CMOS SERIAL E2PROM
S-24C01B/02B/04B
6.3 Acknowledgment Polling
Acknowledgment polling is used to know when the rewriting of the E2PROM is finished.
After the E2PROM receives the stop condition signal and once it starts to rewrite, all operations are
prohibited. Also, the E2PROM cannot respond to the signal transmitted by the master device.
Accordingly, the master device transmits the start condition signal and the device address read/write
instruction code to the E2PROM (namely, the slave device) to detect the response of the slave device. This
allows users to know when the rewriting of the E2PROM is finished.
That is, if the slave device does not output the acknowledgment signal, it means that the E2PROM is
rewriting; when the slave device outputs the acknowledgment signal, you can know that rewriting has been
completed. It is recommended to use read instruction “1” for the read/write instruction code transmitted by
the master device.
6.4 Write Protection
The S-24C01B/02B/04B are capable of protecting the memory. When the WP pin is connected to VCC,
writing to all memory area is prohibite in the S-24C01B, writing to 50% of the latter half of memory area is
prohibited in the S-24C02B/04B. (prohibited adress are 080h to 0FFh in the S-24C02B; 100h to 1FFh in the
S-24C04B) Even when writing is prohibited, since the controller inside the IC is operating, the response to
the signal transmitted by the master device is not available during the time of writing (tWR).
When the WP pin is connected to GND, the write protection becomes invalid, and writing in all memory area
becomes available. However, when there is no need for using write protection, always connect the WP pin
to GND. The write protection is valid in the operating voltage range.
Seiko Instruments Inc.
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S-24C02B (Seiko)
2-WIRE CMOS SERIAL E2PROM

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2-WIRE CMOS SERIAL E2PROM
S-24C01B/02B/04B
Rev.3.2_00
7. Read
7.1 Current Address Read
The E2PROM is capable of storing the last accessed memory address during both writing and reading. The
memory address is stored as long as the power voltage is more than the retention voltage VAH.
Accordingly, when the master device recognizes the position of the address pointer inside the E2PROM,
data can be read from the memory address of the current address pointer without assigning a word
address. This is called “Current Address Read”.
“Current Address Read” is explained for when the address counter inside the E2PROM is an “n” address.
When the E2PROM receives a 7-bit length device address and a 1-bit read/write instruction code “1”,
following the start condition signal, it outputs the acknowledgment signal. However, in the S-24C04B, page
address P0 becomes invalid, and the memory address of the current address pointer becomes valid.
Next, 8-bit length data at an “n” address is output from the E2PROM, in synchronization with the SCL clock.
The address counter is incremented at the falling edge of the SCL clock by which the 8th bit of data is
output, and the address counter goes to address n+1.
The master device does not output the acknowledgment signal and transmits the stop condition signal to
finish reading.
S
TR
A
R
T
DEVICE
ADDRESS
E
A
D
NO ACK from
Master Device
S
T
O
P
SDA LINE
1 0 1 0 X X P0 1 D7 D6 D5 D4 D3 D2 D1 D0
M LR A
S S/ C
B BW K
Remark P0 is ‘don’t care’ in the S-24C01B/02B
DATA
ADR INC
Figure 14 Current Address Read
For recognition of the address pointer inside the E2PROM, take into consideration the following:
The memory address counter inside the E2PROM is automatically incremented for every falling edge of the
SCL clock by which the 8th bit of data is output during the time of reading. During the time of writing, upper
bits of the memory address (upper 5 bits of the word address in the S-24C01B/02B; upper 4 bits of the word
address and page address P0 in the S-24C04B) are left unchanged and are not incremented.
1. S-24C01B/02B is the upper 5 bits of the word address.
S-24C04B is the upper 4 bits of the word address and the page address P0.
16 Seiko instruments inc.


S-24C02B (Seiko)
2-WIRE CMOS SERIAL E2PROM

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Rev.3.2_00
2-WIRE CMOS SERIAL E2PROM
S-24C01B/02B/04B
7.2 Random Read
Random read is a mode used when the data is read from arbitrary memory addresses.
To load a memory address into the address counter inside the E2PROM, first perform a dummy write
according to the following procedures:
When the E2PROM receives a 7-bit length device address and a 1-bit read/write instruction code “0”,
following the start condition signal, it outputs the acknowledgment signal.
Next, the E2PROM receives an 8-bit length word address and outputs the acknowledgment signal. Last, the
memory address is loaded into the address counter of the E2PROM.
the E2PROM receives the write data during byte or page writing. However, data reception is not performed
during dummy write.
The memory address is loaded into the memory address counter inside the E2PROM during dummy write.
After that, the master device can read the data starting from the arbitrary memory address by transmitting a
new start condition signal and performing the same operation as that in the “Current Address Read”.
That is, when the E2PROM receives a 7-bit length device address and a 1-bit read/write instruction code “1”,
following the start condition signal, it outputs the acknowledgment signal.
Next, 8-bit length data is output from the E2PROM, in synchronization with the SCL clock. The master device
does not output an acknowledgment signal and transmits the stop condition signal to finish reading.
SW
S
TR
TR
AI
AE
R
DEVICE
T
R
DEVICE
A
T
ADDRESS
E
WORD ADDRESS (n)
T
ADDRESS
D
NO ACK from
Master Device
DATA
S
T
O
P
SDA
LINE
1 0 1 0 X X P0 0
W7 W6 W5 W4 W3 W2 W1 W0
1 0 1 0 X X P0 1 D7 D6 D5 D4 D3 D2 D1 D0
M LR A
S S/ C
B BW K
AM
CS
KB
LR A
S/ C
BW K
ADR INC
DUMMY WRITE
Remark1. W7 is optional in the S-24C01B.
2. P0 is “don’t care” in the S-24C01B/02B.
Figure 15 Random Read
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S-24C02B (Seiko)
2-WIRE CMOS SERIAL E2PROM

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2-WIRE CMOS SERIAL E2PROM
S-24C01B/02B/04B
Rev.3.2_00
7.3 Sequential Read
When the E2PROM receives a 7-bit length device address and a 1-bit read/write instruction code “1” in both
current and random read operations, following the start condition signal, it outputs the acknowledgment
signal.
When 8-bit length data is output from the E2PROM, in synchronization with the SCL clock, the memory
address counter inside the E2PROM is automatically incremented at the falling edge of the SCL clock, by
which the 8th data is output.
When the master device transmits the acknowledgment signal, the next memory address data is output.
When the master device transmits the acknowledgment signal, the memory address counter inside the
E2PROM is incremented and read data in succession. This is called “Sequential Read”.
When the master device does not output an acknowledgement signal and transmits the stop condition
signal, the read operation is finished.
Data can be read in the “Sequential Read” mode in succession. When the memory address counter reaches
the last word address, it rolls over to the first memory address.
SDA
LINE
R
DEVICE E
ADDRESS A
D
1
D7
RA
/C
WK
A
C
K
D0 D7
A
C
K
D0 D7
A
C
K
D0 D7
NO ACK from
Master Device
D0
S
T
O
P
DATA(n)
DATA (n+1)
DATA (n+2)
DATA (n+x)
ADR INC
ADR INC
Figure 16 Sequential Read
ADR INC
ADR INC
18 Seiko instruments inc.


S-24C02B (Seiko)
2-WIRE CMOS SERIAL E2PROM

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Rev.3.2_00
2-WIRE CMOS SERIAL E2PROM
S-24C01B/02B/04B
8. Address Increment Timing
The address increment timing is as follows. During reading operation, the memory address counter is
automatically incremented at the falling edge of the SCL clock (the 8th read data is output).
During writing operation, the memory address counter is also automatically incremented at the falling edge of
the SCL clock when the 8th bit write data is fetched.
SCL
SDA
891
R / W=1
ACK Output
D7 Output
8
D0 Output
9
Address Increment
Figure 17 Address Increment Timing in Reading
SCL
SDA
891
R / W=0
ACK Output D7 Input
89
D0 Input
ACK Output
Address Increment
Figure 18 Address Increment Timing in Writing
Seiko Instruments Inc.
19


S-24C02B (Seiko)
2-WIRE CMOS SERIAL E2PROM

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2-WIRE CMOS SERIAL E2PROM
S-24C01B/02B/04B
Rev.3.2_00
„ Precautions
Generally, an E2PROM may cause a malfunction by the operation in low voltage range induced by power
ON/OFF. The S-24C01B/02B/04B initialize themselves by the power on clear circuit at power on.
Attention should be paid to the followings so as to operate the power on clear circuit correctly, otherwise
malfunction may occur.
1. All input and output pins should be connected to the VCC or the GND level so as not to be floating.
2. Raise the power voltage up to the operation voltage from 0 V without staying at middle range.
3. Raising speed of the power voltage should be faster than 40 ms/V.
4. Power off interval before power on should be longer than 100 ms.
Do not apply an electrostatic discharge to this IC that exceeds the performance ratings of the built-in
electrostatic protection circuit.
SII claims no responsibility for any and all disputes arising out of or in connection with any infringement of
the products including this IC upon patents owned by a third party.
„ I2C Bus License
Purchase of I2C components of Seiko Instruments Inc., conveys a license under the Philips I2C Patent.
Rights to use these components in an I2C system, is granted provided that the system conforms to the I2C
Standard Specification as defined by Philips.
Please note that a product or a system incorporating this IC may infringe upon the Philips I2C Patent Rights
depending upon its configuration. In the event of such infringement Seiko Instruments Inc., shall not bear
any responsibility for any matters with regard to and arising from such patent infringement.
20 Seiko instruments inc.


S-24C02B (Seiko)
2-WIRE CMOS SERIAL E2PROM

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Rev.3.2_00
„ Characteristics
1. DC Characteristics
1.1 Current consumption (READ) ICC1
Ambient temperature Ta
VCC=5.5 V
fSCL=100 kHz
DATA=0101
200
100
0
40
0 85
Ta (°C)
1.3 Current consumption (READ) ICC1
Ambient temperature Ta
VCC=1.8 V
fSCL=100 kHz
DATA=0101
40
20
0
40
0 85
Ta (°C)
1.5 Current consumption (READ) ICC1
Power supply voltage VCC
Ta=25 °C
fSCL=400 kHz
DATA=0101
200
100
0
2 3 456 7
VCC (V)
2-WIRE CMOS SERIAL E2PROM
S-24C01B/02B/04B
1.2 Current consumption (READ) ICC1
Ambient temperature Ta
VCC=3.3 V
fSCL=100 kHz
DATA=0101
200
100
0
40 0
85
Ta (°C)
1.4 Current consumption (READ) ICC1
Power supply voltage VCC
Ta=25 °C
fSCL=100 kHz
DATA=0101
100
50
0
2 3 4 56 7
VCC (V)
1.6 Current consumption (READ) ICC1
Clock frequency fscl
VCC=5.0 V
Ta=25 °C
200
100
0
100 k 200 k 300 k 400 k
fSCL(Hz)
Seiko Instruments Inc.
21


S-24C02B (Seiko)
2-WIRE CMOS SERIAL E2PROM

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2-WIRE CMOS SERIAL E2PROM
S-24C01B/02B/04B
Rev.3.2_00
1.7 Current consumption (PROGRAM) ICC2
Ambient temperature Ta
VCC=5.5 V
1.0
0.5
0
40 0
85
Ta (°C)
1.9 Current consumption (PROGRAM) ICC2
Ambient temperature Ta
VCC=2.5 V
1.0
0.5
0
40 0
85
Ta (°C)
1.11 Standby current consumption ISB
Ambient temperature Ta
VCC=5.5 V
10-7
10-8
10-9
10-10
10-11
40 0
85
Ta (°C)
1.8 Current consumption (PROGRAM) ICC2
Ambient temperature Ta
VCC=3.3 V
1.0
0.5
0
40 0
85
Ta (°C)
1.10 Current consumption (PROGRAM) ICC2
Power supply voltage VCC
Ta=25 °C
1.0
0.5
0
2 3 4 56 7
VCC (V)
1.12 Input leakage current ILI
Ambient temperature Ta
VCC=5.5 V
SDA, SCL, WP=0V
1.0
0.5
0
40 0
85
Ta (°C)
22 Seiko instruments inc.


S-24C02B (Seiko)
2-WIRE CMOS SERIAL E2PROM

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Rev.3.2_00
1.13 Input leakage current ILI
Ambient temperature Ta
VCC=5.5 V
SDA, SCL, WP=5.5 V
1.0
0.5
0
40 0
85
Ta (°C)
1.15 Output leakage current ILO
Ambient temperature Ta
VCC=5.5 V
SDA=5.5 V
1.0
0.5
0
40 0
85
Ta (°C)
1.17 Low level output voltage VOL
Ambient temperature Ta
VCC=4.5 V
0.3 IOL=3.2 mA
0.2
0.1
40 0
85
Ta (°C)
2-WIRE CMOS SERIAL E2PROM
S-24C01B/02B/04B
1.14 Output leakage current ILO
Ambient temperature Ta
VCC=5.5 V
SDA=0 V
1.0
0.5
0
40 0
85
Ta (°C)
1.16 Low level output voltage VOL
Low level output current IOL
Ta=25 °C
0.2 VCC=3.3 V
0.1
VCC=5 V
0
1 2 3 45 6
IOL (mA)
1.18 Low level output voltage VOL
Ambient temperature Ta
VCC=1.8 V
0.3 IOL=100 µA
0.2
0.1
40 0
85
Ta (°C)
Seiko Instruments Inc.
23


S-24C02B (Seiko)
2-WIRE CMOS SERIAL E2PROM

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2-WIRE CMOS SERIAL E2PROM
S-24C01B/02B/04B
1.19 Low level output current IOL
Ambient temperature Ta
VCC=4.5 V
VOL=0.45 V
20
10
0
40 0
85
Ta (°C)
1.21 High input inversion voltage VIH
Power supply voltageVCC
Ta=25 °C
SDA, SCL, WP
3.0
2.0
1.0
0 1 2 34 5 6 7
VCC(V)
1.23 Low input inversion voltage VIL
Power supply voltageVCC
Ta=25 °C
SDA, SCL, WP
3.0
2.0
1.0
0 1 2 34 5 67
VCC (V)
Rev.3.2_00
1.20 Low level output current IOL
Ambient temperature Ta
VCC=1.8 V
VOL=0.1 V
2.0
1.0
0
40 0
85
Ta (°C)
1.22 High input inversion voltage VIH
Ambient temperature Ta
VCC=5.0 V
SDA, SCL, WP
3.0
2.0
1.0
0 40 0
85
Ta (°C)
1.24 Low input inversion voltage VIL
Ambient temperature Ta
Ta=5.0 V
SDA, SCL, WP
3.0
2.0
1.0
0 40
0 85
Ta (°C)
24 Seiko instruments inc.


S-24C02B (Seiko)
2-WIRE CMOS SERIAL E2PROM

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Rev.3.2_00
2. AC Characteristics
2.1 Maximum operating frequency fmax
Power supply voltage VCC
Ta=25 °C
1M
100 k
10 k
1234 5
VCC (V)
2.3 Write time tWR
Ambient temperature Ta
VCC=4.5 V
6
4
2
40 0
85
Ta (°C)
2.5 SDA output delay time tAA
Ambient temperature Ta
VCC=4.5 V
1.5
1.0
0.5
40 0
85
Ta (°C)
2-WIRE CMOS SERIAL E2PROM
S-24C01B/02B/04B
2.2 Write time tWR
Power supply voltage VCC
Ta=25 °C
4
3
2
1
1 2 3 4 56 7
VCC (V)
2.4 Write time tWR
Ambient temperature Ta
VCC=2.5 V
6
4
2
40 0
85
Ta (°C)
2.6 SDA output delay time tAA
Ambient temperature Ta
VCC=2.7 V
1.5
1.0
0.5
40 0
85
Ta (°C)
Seiko Instruments Inc.
25


S-24C02B (Seiko)
2-WIRE CMOS SERIAL E2PROM

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2-WIRE CMOS SERIAL E2PROM
S-24C01B/02B/04B
2.7 Data output delay time tAA
Ambient temperature Ta
VCC=1.8 V
3.0
2.0
1.0
40 0
85
Ta (°C)
Rev.3.2_00
26 Seiko instruments inc.


S-24C02B (Seiko)
2-WIRE CMOS SERIAL E2PROM

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Rev.3.2_00
„ Product Code Structure
S-24C0xB xx - xx x
2-WIRE CMOS SERIAL E2PROM
S-24C01B/02B/04B
P code (Distincion for package process)
IC direction in tape specification (Except 8-Pin DIP)
Package code
Product name
DP
FJ
MFN
: DIP
: SOP
: MSOP
S-24C01B : 1 k bits
S-24C02B : 2 k bits
S-24C04B : 4 k bits
Product
name
S-24C01B
S-24C02B
S-24C04B
Package
code
DP
FJ
MFN
Taping
specification
-TB
-TB
Package
drawing
DP008-A
FJ008-A
FN008-A
Tape
drawing
FJ008-D
FJ008-A
Reel
drawing
FJ008-D
FN008-N
NOTE 1. Package dimensions of FJ(SOP) are same in the range of deviation.
2. Please contact an SII local representative for details.
Seiko Instruments Inc.
27


S-24C02B (Seiko)
2-WIRE CMOS SERIAL E2PROM

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9.3(9.6max.)
85
1
1.0
4
1.5
7.62
2.54 0.5±0.1
0.3
+0.1
-0.05
0° to 15°
No. DP008-A-P-SD-1.1
TITLE
No.
SCALE
UNIT
DIP8-A-PKG Dimensions
DP008-A-P-SD-1.1
mm
Seiko Instruments Inc.


S-24C02B (Seiko)
2-WIRE CMOS SERIAL E2PROM

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5.02±0.2
85
14
0.20±0.05
1.27 0.4±0.05
No. FJ008-A-P-SD-2.1
TITLE
No.
SCALE
UNIT
SOP8J-A-PKG Dimensions
FJ008-A-P-SD-2.1
mm
Seiko Instruments Inc.


S-24C02B (Seiko)
2-WIRE CMOS SERIAL E2PROM

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2.0±0.05
ø1.55±0.05
4.0±0.1(10 pitches:40.0±0.2)
0.3±0.05
5°max.
ø2.0±0.05
6.7±0.1
8.0±0.1
2.1±0.1
18
45
Feed direction
No. FJ008-D-C-SD-1.1
TITLE
No.
SCALE
UNIT
SOP8J-D-Carrier Tape
FJ008-D-C-SD-1.1
mm
Seiko Instruments Inc.




S-24C02B.pdf
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