参数资料
型号: 24LC32AT/SM
厂商: Microchip Technology
文件页数: 5/44页
文件大小: 0K
描述: IC EEPROM 32KBIT 400KHZ 8SOIC
产品培训模块: I2C Serial EEPROM
标准包装: 2,100
格式 - 存储器: EEPROMs - 串行
存储器类型: EEPROM
存储容量: 32K (4K 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: 0°C ~ 70°C
封装/外壳: 8-SOIC(0.209",5.30mm 宽)
供应商设备封装: 8-SOIJ
包装: 带卷 (TR)
24AA32A/24LC32A
2.0
PIN DESCRIPTIONS
The descriptions of the pins are listed in Table 2-1.
TABLE 2-1:
PIN FUNCTION TABLE
Name PDIP SOIC SOIJ TSSOP
Rotated
TSSOP
DFN (1) TDFN (1) MSOP SOT-23 CS
Description
A0
A1
A2
V SS
SDA
SCL
WP
V CC
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
3
4
5
6
7
8
1
2
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
2
3
1
5
4
2
5
4
3
1
Chip Address Input
Chip Address Input
Chip Address Input
Ground
Serial Address/Data I/O
Serial Clock
Write-Protect Input
+1.7V to 5.5V Power Supply
Note 1: The exposed pad on the DFN/TDFN packages 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 24XX32A for
multiple device operation. The levels on these inputs
are compared with the corresponding bits in the slave
The SCL input is used to synchronize the data transfer
to and from the device.
address. The chip is selected if the comparison is true.
2.4
Write-Protect (WP)
Up to eight devices may be connected to the same bus
by using different Chip Select bit combinations. These
inputs must be connected to either V CC or V SS .
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. Address
pins are not available in the SOT-23 and chip scale
packages.
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.
2.2
Serial Data (SDA)
SDA 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)
For normal data transfer, SDA is allowed to change
only during SCL low. Changes during SCL high are
reserved for indicating Start and Stop conditions.
? 2002-2012 Microchip Technology Inc.
DS21713M-page 5
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