24AA04-I/SNG Microchip Technology, 24AA04-I/SNG Datasheet - Page 15

• Manufacturer Part Number: 24AA04-I/SNG
• Description: EEPROM Serial-I2C 4K-Bit 2Block x 256 x 8 1.8V/2.5V/3.3V/5V 8-Pin SOIC N Tube
• Manufacturer: Microchip Technology

Specifications of 24AA04-I/SNG

• Package: 8SOIC N
• Interface Type: Serial-I2C
• Density: 4 Kb
• Maximum Operating Frequency: 0.4 MHz
• Maximum Random Access Time: 900 ns
• Typical Operating Supply Voltage: 1.8|2.5|3.3|5 V
• Organization: 2Blockx256x8
• Data Retention: 200(Min) Year
• Operating Temperature: -40 to 85 °C

5.7.1
Chip Select bits A2, A1 and A0 can be used to expand
the contiguous address space by adding up to eight
24XXs on the same bus. Software can use the three
address bits of the control byte as the three Most
Significant bits of the address byte. For example, in the
24XX32 devices, software can use A0 of the control
byte as address bit A12; A1 as address bit A13; and A2
as address bit A14 (Table 5-1). It is not possible to
sequentially read across device boundaries.
TABLE 5-1:
© 2007 Microchip Technology Inc.
1K (24C01C)
1K (24XX014)
2K (24C02C)
2K (24XX024/025)
32K (24XX32)
64K (24XX64)
128K (24XX128)
256K (24XX256)
512K (24XX512)
1024K (24XX1025)
Note 1:
2:
3:
CONTIGUOUS ADDRESSING
Up to two 24XX128 or 24XX256 devices in the MSOP package can be added for up to 256 kb or 512 kb of
address space, respectively. Bits A0 and A1 must be set to ‘0’.
Using the block select bit ‘B0’, up to four 24XX1025 devices can be cascaded together.
For proper operation of the 24XX1025 the A2 pin must be tied to a logic high. Software addressing uses
B0 to select between upper and lower 512 Kbit segments of memory.
ACROSS MULTIPLE DEVICES
CONTROL BYTE ADDRESS BITS
Maximum
Devices
8
8
4
8
8
8
8
8
8
8
(1)
(1)
(2)
Address Space
Contiguous
Maximum
256 Kb
512 Kb
16 Kb
16 Kb
24AAXX/24LCXX/24FCXX
4 Mb
1 Mb
2 Mb
4 Mb
8 Kb
8 Kb
Chip Select Bit
A16*
A17*
B0
A10
A10
A10
A10
A14
A15
A18
A2
(3)
Chip Select Bit
A15*
A16*
A13
A14
A17
A17
A1
A9
A9
A9
A9
DS21930C-page 15
Chip Select Bit
A12
A13
A14
A15
A16
A16
A0
A8
A8
A8
A8