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PDF LE24CBK22 Data sheet ( Hoja de datos )
| Número de pieza | LE24CBK22 | |
| Descripción | Two Wire Serial Interface EEPROM | |
| Fabricantes | Sanyo Semicon Device | |
| Logotipo |  |
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www.DataSheet.co.kr
Ordering number : EN*A1514A
CMOS IC
LE24CBK22 Two Wire Serial Interface EEPROM
(2K+2K EEPROM)
Overview
The dual port EEPROM series consists of two independent banks, and each bank can be controlled separately using
dedicated control pins. The two banks can each be controlled separately, but share the internal power supply system. In
addition, this product uses a 2-wire serial interface, and is the optimal device for realizing substantial reductions in
system cost and mounting area, as well as low power consumption.
The dual port EEPROM series also has a combined mode that allows the two-bank configuration (2K bits + 2K bits) to
be used as a pseudo one-bank configuration (4K bits) by setting the COBM pin low. Together with the 16-byte page
write function, this enables a reduction in the number of factory write processes.
This product incorporates SANYO's high performance CMOS EEPROM technology and realizes high-speed operation
and high-level reliability. The interface of this product is compatible with the I2C bus protocol, making it ideal as a
nonvolatile memory for small-scale parameter storage.
In addition, this product also supports DDC2TM, so it can also be used as an EDID data storage memory for display
equipment.
Functions
• Capacity
: 2K bits (256 × 8 bits) + 2K bits (256 × 8 bits), 4K bits in total
• Bank structure
: 2 banks (2K bits + 2K bits)
• Single supply voltage
• Interface
: 2.5V to 5.5V
: Two wire serial interface (I2C Bus*), VESA DDC2TM compliant**
• Operating clock frequency : 400kHz (max)
• Low power consumption : Standby: 5μA (max)
: Active (Read): 0.5mA (max)
* : I2C Bus is a trademark of Philips Corporation.
** : DDC and EDID are trademarks of Video Electronics Standard Association (VESA).
Continued on next page.
* This product is licensed from Silicon Storage Technology, Inc. (USA), and manufactured and sold by
SANYO Semiconductor Co., Ltd.
Any and all SANYO Semiconductor Co.,Ltd. products described or contained herein are, with regard to
"standard application", intended for the use as general electronics equipment (home appliances, AV equipment,
communication device, office equipment, industrial equipment etc.). The products mentioned herein shall not be
intended for use for any "special application" (medical equipment whose purpose is to sustain life, aerospace
instrument, nuclear control device, burning appliances, transportation machine, traffic signal system, safety
equipment etc.) that shall require extremely high level of reliability and can directly threaten human lives in case
of failure or malfunction of the product or may cause harm to human bodies, nor shall they grant any guarantee
thereof. If you should intend to use our products for applications outside the standard applications of our
customer who is considering such use and/or outside the scope of our intended standard applications, please
consult with us prior to the intended use. If there is no consultation or inquiry before the intended use, our
customer shall be solely responsible for the use.
Specifications of any and all SANYO Semiconductor Co.,Ltd. products described or contained herein stipulate
the performance, characteristics, and functions of the described products in the independent state, and are not
guarantees of the performance, characteristics, and functions of the described products as mounted in the
customer's products or equipment. To verify symptoms and states that cannot be evaluated in an independent
device, the customer should always evaluate and test devices mounted in the customer's products or
equipment.
10511 SY/82609 SY IM No.1514-1/20
Datasheet pdf - http://www.DataSheet4U.net/
1 page  
www.DataSheet.co.kr
AC Electric Characteristics
Fast Mode
Parameter
Slave mode SCL clock frequency
SCL clock low time
SCL clock high time
SDA output delay time
SDA data output hold time
Start condition setup time
Start condition hold time
Data in setup time
Data in hold time
Stop condition setup time
SCL, SDA rise time
SCL, SDA fall time
Bus release time
Noise suppression time
Write cycle time
Standard Mode
Parameter
Slave mode SCL clock frequency
SCL clock low time
SCL clock high time
SDA output delay time
SDA data output hold time
Start condition setup time
Start condition hold time
Data in setup time
Data in hold time
Stop condition setup time
SCL, SDA rise time
SCL, SDA fall time
Bus release time
Noise suppression time
Write cycle time
LE24CBK22
Symbol
fSCLS
tLOW
tHIGH
tAA
tDH
tSU.STA
tHD.STA
tSU.DAT
tHD.DAT
tSU.STO
tR
tF
tBUF
tSP
tWC
Symbol
fSCLS
tLOW
tHIGH
tAA
tDH
tSU.STA
tHD.STA
tSU.DAT
tHD.DAT
tSU.STO
tR
tF
tBUF
tSP
tWC
VDD=2.5V to 5.5V
min typ
0
1200
600
100
100
600
600
100
0
600
1200
max
400
900
300
300
100
5
unit
kHz
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ms
VDD=2.5V to 5.5V
min typ
0
4700
4000
100
100
4700
4000
250
0
4000
4700
max
100
3500
1000
300
100
5
unit
kHz
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ms
Bus Timing
SCL
SDA/IN
SDA/OUT
tF tHIGH tLOW
tSU.STA
tHD.STA tHD.DAT
tSU.DAT
tAA tDH
tR
tSP
tSU.STO
tSP
tBUF
No.1514-5/20
Datasheet pdf - http://www.DataSheet4U.net/
5 Page 
www.DataSheet.co.kr
LE24CBK22
7-2. Page writing
This product enables pages with up to 16 bytes to be written. The basic data transfer procedure is the same as for byte
writing: Following the start condition, the 7-bit device address and write command code “0,” word address (n), and
data (n) are input in this order while confirming acknowledge “0” every 9 bits. The page write mode is established if,
after data (n) is input, the write data (n+1) is input without inputting the stop condition. After this, the write data
equivalent to the largest page size can be received by a continuous process of repeating the receiving of the 8-bit
write data and generating the acknowledge signals.
At the point when the write data (n+1) has been input, the lower 4 bits (A0-A3) of the word addresses are
automatically incremented to form the (n+1) address. In this way, the write data can be successively input, and the
word address on the page is incremented each time the write data is input. If the write data exceeds 16 bytes or the
last address of the page is exceeded, the word address on the page is rolled over. Write data will be input into the
same address two or more times, but in such cases the write data that was input last will take effect. Finally, the
EEPROM internal write operation corresponding to the page size for which the write data is received starts from the
designated memory address when the stop condition is received.
Memory Address(n)
Data(n)
Data(n+1)
SDA
1
0
1
0
S2
S1
S0/
A8
W
A7 A6 A5 A4 A3 A2 A1 A0
ACK
R/W
D7 D6 D5 D4 D3 D2 D1 D0
ACK
D7 D6 - D1 D0
ACK
••
ACK
• • D7 D6 - D1 D0 D7 D6 - D1 D0
ACK
In bank mode: S2, S1, and S0 are valid.
In combined mode: A8 is valid. S2 and S1 are don’t care.
Data(n+x)
D7 D6 - D1 D0 D7 D6 - D1 D0
ACK
ACK
Access from master
7-3. Acknowledge polling
Acknowledge polling is used to find out when the EEPROM internal write operation is completed. When the stop
condition is received and the EEPROM starts rewriting, all operations are prohibited, and no response can be given to
the signals sent by the master device. Therefore, in order to find out when the EEPROM internal write operation is
completed, the start condition, device address and write command code are sent from the master device to the
EEPROM (slave device), and the response of the slave device is detected.
In other words, if the slave device does not send the acknowledge signal, it means that the internal write operation is
in progress; conversely, if it does send the acknowledge signal, it means that the internal write operation has been
completed.
SDA
During Write
During Write
1
0
1
0
S2
S1
S0/
A8
W
1
0
1
0
S2 S1 S0/
A8
W
NO ACK
R/W
NO ACK
R/W
End of Write
1
0
1
0
S2
S1
S0/
A8
W
••
ACK
R/W
In bank mode: S2, S1, and S0 are valid.
In combined mode: A8 is valid. S2 and S1 are don’t care.
Access from master
No.1514-11/20
Datasheet pdf - http://www.DataSheet4U.net/
11 Page | ||
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| PDF Descargar | [ Datasheet LE24CBK22.PDF ] | |
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