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PDF ( 数据手册 , 数据表 ) 24AA025E64

零件编号 24AA025E64
描述 2K I2C Serial EEPROMs
制造商 Microchip
LOGO Microchip LOGO 


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24AA025E64 数据手册, 描述, 功能
24AA02E48/24AA025E48/
24AA02E64/24AA025E64
2K I2C Serial EEPROMs with EUI-48™ or EUI-64™ Node Identity
Device Selection Table
Part Number
VCC
Range
Max. Clock
Frequency
24AA02E48
24AA025E48
24AA02E64
24AA025E64
1.7V-5.5V
1.7V-5.5V
1.7V-5.5V
1.7V-5.5V
400 kHz(1)
400 kHz(1)
400 kHz(1)
400 kHz(1)
Note 1: 100 kHz for VCC <2.5V
Temp. Ranges Cascadable
I No
I Yes
I No
I Yes
Page Size
8-Byte
16-Byte
8-Byte
16-Byte
Node
Address
EUI-48™
EUI-48™
EUI-64™
EUI-64™
Features
• Pre-Programmed Globally Unique, 48-bit or 64-bit
Node Address
• Compatible with EUI-48™ and EUI-64™
• Single Supply with Operation Down to 1.7V
• Low-Power CMOS Technology:
- Read current 1 mA, maximum
- Standby current: 1 µA, maximum (I-Temp.)
5 µA, maximum (E-Temp.)
• 2-Wire Serial Interface, I2C Compatible
• Schmitt Trigger Inputs for Noise Suppression
• Output Slope Control to Eliminate Ground Bounce
• 100 kHz and 400 kHz Clock Compatibility
• Page Write Time 3 ms, typical
• Self-Timed Erase/Write Cycle
• Page Write Buffer:
- 8-byte page (24AA02E48/24AA02E64)
- 16-byte page (24AA025E48/24AA025E64)
• ESD Protection >4,000V
• More than 1 Million Erase/Write Cycles
• Data Retention >200 Years
• Factory Programming Available
• Available Packages:
- 8-lead SOIC and 5-lead SOT-23
(24AA02E48/24AA02E64)
- 8-lead SOIC and 6-lead SOT-23
(24AA025E48/24AA025E64)
• RoHS Compliant
• Available for Extended Temperature Ranges:
- Industrial (I): -40°C to +85°C
- Automotive (E): -40°C to +125°C
Description
The Microchip Technology Inc.
24AA02E48/24AA025E48/24AA02E64/24AA025E64
(24AA02XEXX) is a 2 Kbit Electrically Erasable
PROM. The device is organized as two blocks of
128 x 8-bit memory with a 2-wire serial interface.
Low-voltage design permits operation down to 1.7V,
with maximum standby currents of only 1 µA for
I-Temp. and 5 µA for E-Temp., as well as a maximum
active current of 1 mA. The 24AA02XEXX also has a
page write capability for up to eight bytes of data
(16 bytes on the 24AA025E48/24AA025E64). The
24AA02XEXX is available in the standard 8-pin
SOIC, 5-lead SOT-23, and 6-lead SOT-23 packages.
Note:
24AA02XEXX is used in this document as
a generic part number for the
24AA02E48/24AA025E48/24AA02E64/2
4AA025E64 devices.
Packages (24AA02E48/24AA02E64)
SOT-23
SOIC
SCL 1
Vss
SDA
2
3
5 NC NC 1
NC 2
NC 3
4 Vcc VSS 4
8 VCC
7 NC
6 SCL
5 SDA
Packages (24AA025E48/24AA025E64)
SOT-23
SOIC
SCL
VSS
SDA
1
2
3
6 VCC A0 1
5 A0
4 A1
A1 2
A2 3
VSS 4
8 VCC
7 NC
6 SCL
5 SDA
2008-2016 Microchip Technology Inc.
DS20002124G-page 1







24AA025E64 pdf, 数据表
24AA02E48/24AA025E48/24AA02E64/24AA025E64
5.0 DEVICE ADDRESSING
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
24AA02XEXX, this is set as ‘1010binary for read and
write operations. For the 24AA02E48/24AA02E64 the
next three bits of the control byte are “don’t cares”.
For the 24AA025E48/24AA025E64, the next three bits
of the control byte are the Chip Select bits (A2, A1, A0).
The Chip Select bits allow the use of up to eight
24AA025E48/24AA025E64 devices on the same bus
and are used to select which device is accessed. The
Chip Select bits in the control byte must correspond to
the logic levels on the corresponding A2, A1 and A0
pins for the device to respond. These bits are in effect
the three Most Significant bits of the word address.
For the 6-pin SOT-23 package, the A2 address pin is
not available. During device addressing, the A2 Chip
Select bit should be set to ‘0’.
The last bit of the control byte defines the operation to
be performed. When set to ‘1’, a read operation is
selected. When set to ‘0’, a write operation is selected.
Following the Start condition, the 24AA02XEXX moni-
tors the SDA bus, checking the device type identifier
being transmitted and, upon a 1010code, the slave
device outputs an Acknowledge signal on the SDA line.
Depending on the state of the R/W bit, the
24AA02XEXX will select a read or write operation.
Operation
Read
Write
Control
Code
1010
1010
Chip Select
Chip Address
Chip Address
R/W
1
0
FIGURE 5-1:
CONTROL BYTE
ALLOCATION
Control Code
Read/Write Bit
Chip
Select
Bits
S 1 0 1 0 A2* A1* A0* R/W ACK
Slave Address
Start Bit
Acknowledge Bit
Note: * Bits A0, A1 and A2 are “don’t cares” for
the 24AA02E48/24AA02E64.
5.1 Contiguous Addressing Across
Multiple Devices
The Chip Select bits A2, A1 and A0 can be used to
expand the contiguous address space for up to 16K bits
by adding up to eight 24AA025E48/24AA025E64
devices on the same bus. In this case, software can
use A0 of the control byte as address bit A8, A1 as
address bit A9 and A2 as address bit A10. It is not
possible to sequentially read across device
boundaries.
For the SOT-23 package, up to four
24AA025E48/24AA025E64 devices can be added for
up to 8K bits of address space. In this case, software
can us A0 of the control byte as address bit A8, and
A1 as address bit A9. It is not possible to sequentially
read across device boundaries.
FIGURE 5-2:
ADDRESS SEQUENCE BIT ASSIGNMENTS
Control Byte
Address Low Byte
1 0 1 0 A2* A1* A0*R/W
A
7
A
0
Note:
Control
Code
Chip
Select
bits
* Bits A0, A1 and A2 are “don’t cares” for the 24AA02E48/24AA02E64.
DS20002124G-page 8
2008-2016 Microchip Technology Inc.







24AA025E64 equivalent, schematic
24AA02E48/24AA025E48/24AA02E64/24AA025E64
10.0 PACKAGING INFORMATION
10.1 Package Marking Information
8-Lead SOIC (3.90 mm)
XXXXXXXT
XXXXYYWW
NNN
Example
24A2E48I
SN e31625
13F
5-Lead SOT-23 (1-Line Marking)
XXNN
Example
2K3F
6-Lead SOT-23 (1-Line Marking)
XXNN
Example
HS3F
5-Lead SOT-23 (2-Line Marking)
XXXXY
WWNNN
6-Lead SOT-23 (2-Line Marking)
XXXXY
WWNNN
Example
AAAB6
251L7
Example
AAAC6
251L7
1st Line Marking Code
Part Number
SOT-23
SOIC
I-Temp.
E-Temp.
I-Temp.
24AA02E48
24AA025E48
24AA02E64
24AA025E64
2KNN(1,2)
HSNN(1,2)
AAABY(3)
AAACY(3)
AABLY(3)
AABMY(3)
AABNY(3)
AABPY(3)
24A2E48I
4A25E48I
24A2E64I
4A25E64I
Note 1: NN = Alphanumeric traceability code
2: These parts use the 1-line SOT-23 marking format
3: These parts use the 2-line SOT-23 marking format
E-Temp.
24A2E48E
4A25E48E
24A2E64E
4A25E64E
DS20002124G-page 16
2008-2016 Microchip Technology Inc.










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