24LC02B/P Microchip Technology, 24LC02B/P Datasheet - Page 7

• Manufacturer Part Number: 24LC02B/P
• Description: IC EEPROM 2KBIT 400KHZ 8DIP
• Manufacturer: Microchip Technology

Specifications of 24LC02B/P

• Memory Size: 2K (256 x 8)
• Package / Case: 8-DIP (0.300", 7.62mm)
• Operating Temperature: 0°C ~ 70°C
• Format - Memory: EEPROMs - Serial
• Memory Type: EEPROM
• Speed: 400kHz
• Interface: I²C, 2-Wire Serial
• Voltage - Supply: 2.5 V ~ 5.5 V
• Organization: 256 K x 8
• Interface Type: I2C
• Maximum Clock Frequency: 0.4 MHz
• Access Time: 900 ns
• Supply Voltage (max): 5.5 V
• Supply Voltage (min): 2.5 V
• Maximum Operating Current: 3 mA
• Maximum Operating Temperature: + 70 C
• Mounting Style: Through Hole
• Minimum Operating Temperature: 0 C
• Operating Supply Voltage: 2.5 V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant

5.0
A control byte is the first byte received following the
Start condition from the master device. The control byte
consists of a four-bit control code. For the 24XX02, this
is set as ‘
The next three bits of the control byte are “don’t cares”
for the 24XX02.
The last bit of the control byte defines the operation to
be performed. When set to ‘
selected. When set to ‘
Following the Start condition, the 24XX02 monitors the
SDA bus, checking the device type identifier being
transmitted and, upon a
outputs an Acknowledge signal on the SDA line.
Depending on the state of the R/W bit, the 24XX02 will
select a read or write operation.
FIGURE 5-2:
© 2009 Microchip Technology Inc.
Operation
Read
Write
DEVICE ADDRESSING
1010’
Control
x = “don’t care”
binary for read and write operations.
1010
1010
Code
1
Control
Code
0
0
ADDRESS SEQUENCE BIT ASSIGNMENTS
’, a write operation is selected.
‘1010’
1
Control Byte
Block Address
Block Address
Block Select
0
1
’, a read operation is
code, the slave device
x
Select
Block
bits
x
x
R/W
R/W
1
0
FIGURE 5-1:
A
7
Start Bit
x = “don’t care”
•
S
Address Low Byte
24AA02/24LC02B
•
1
Control Code
•
0
•
Slave Address
1
•
CONTROL BYTE
ALLOCATION
0
•
A
0
x
Select
Block
Bits
x
Acknowledge Bit
Read/Write Bit
x
DS21709J-page 7
R/W ACK