参数资料
| 型号： | 24LC128-E/P |
| 厂商： | Microchip Technology |
| 文件页数： | 5/38页 |
| 文件大小： | 0K |
| 描述： | IC EEPROM 128KBIT 400KHZ 8DIP |
| 产品培训模块： | I2C Serial EEPROM |
| 标准包装： | 60 |
| 格式 - 存储器： | EEPROMs - 串行 |
| 存储器类型： | EEPROM |
| 存储容量： | 128K (16K x 8) |
| 速度： | 400kHz |
| 接口： | I²C，2 线串口 |
| 电源电压： | 2.5 V ~ 5.5 V |
| 工作温度： | -40°C ~ 125°C |
| 封装/外壳： | 8-DIP（0.300"，7.62mm） |
| 供应商设备封装： | 8-PDIP |
| 包装： | 管件 |
第1页第2页第3页第4页当前第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页
24AA128/24LC128/24FC128
2.0
PIN DESCRIPTIONS
The descriptions of the pins are listed in Table 2-1.
TABLE 2-1:
PIN FUNCTION TABLE
Name
A0
A1
(NC)
A2
V SS
SDA
SCL
WP
V CC
PDIP
1
2
—
3
4
5
6
7
8
SOIC
1
2
—
3
4
5
6
7
8
TSSOP
1
2
—
3
4
5
6
7
8
MSOP
—
—
1, 2
3
4
5
6
7
8
DFN (1)
1
2
—
3
4
5
6
7
8
TDFN (1)
1
2
—
3
4
5
6
7
8
CS
3
2
—
5
8
6
7
4
1
Function
User Configurable Chip Select
User Configurable Chip Select
Not Connected
User Configurable Chip Select
Ground
Serial Data
Serial Clock
Write-Protect Input
+1.7V to 5.5V (24AA128)
+2.5V to 5.5V (24LC128)
+1.7V to 5.5V (24FC128)
Note 1:
The exposed pad on the DFN/TDFN package can be connected to V SS or left floating.
2.1
A0, A1, A2 Chip Address Inputs
2.3
Serial Clock (SCL)
The A0, A1 and A2 inputs are used by the 24XX128 for
multiple device operations. The levels on these inputs
This input is used to synchronize the data transfer to
and from the device.
are compared with the corresponding bits in the slave
address. The chip is selected if the compare is true.
2.4
Write-Protect (WP)
For the MSOP package only, pins A0 and A1 are not
connected.
Up to eight devices (two for the MSOP package) may
be connected to the same bus by using different Chip
Select bit combinations. These inputs must be
This pin must be connected to either V SS or V CC . If tied
to V SS , write operations are enabled. If tied to V CC ,
write operations are inhibited but read operations are
not affected.
connected to either V CC or V SS .
3.0
FUNCTIONAL DESCRIPTION
In most applications, the chip address inputs A0, A1
and A2 are hard-wired to logic ‘ 0 ’ or logic ‘ 1 ’. For
applications in which these pins are controlled by a
microcontroller or other programmable device, the chip
address pins must be driven to logic ‘ 0 ’ or logic ‘ 1 ’
before normal device operation can proceed.
The 24XX128 supports a bidirectional 2-wire bus and
data transmission protocol. A device that sends data
onto the bus is defined as a transmitter and a device
receiving data as a receiver. The bus must be
controlled by a master device which generates the
Serial Clock (SCL), controls the bus access and
2.2
Serial Data (SDA)
generates the Start and Stop conditions while the
24XX128 works as a slave. Both master and slave can
This is a bidirectional pin used to transfer addresses
and data into and out of the device. It is an open drain
terminal. Therefore, the SDA bus requires a pull-up
resistor to V CC (typical 10 k ? for 100 kHz, 2 k ?? for
400 kHz and 1 MHz).
For normal data transfer, SDA is allowed to change
only during SCL low. Changes during SCL high are
reserved for indicating the Start and Stop conditions.
? 2010 Microchip Technology Inc.
operate as a transmitter or receiver, but the master
device determines which mode is activated.
DS21191S-page 5
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