收藏本站
CAT24AA01, CAT24AA02
Power ? On Reset (POR)
Each CAT24AA01/02 incorporates Power ? On Reset
(POR) circuitry which protects the internal logic against
powering up in the wrong state. The device will power up
into Standby mode after V CC exceeds the POR trigger level
and will power down into Reset mode when V CC drops
below the POR trigger level.
This bi ? directional POR behavior protects the device
against brown ? out failure, following a temporary loss of
power.
Pin Description
SCL: The Serial Clock input pin accepts the clock signal
generated by the Master.
SDA: The Serial Data I/O pin accepts input data and delivers
output data. In transmit mode, this pin is open drain. Data is
acquired on the positive edge, and delivered on the negative
edge of SCL.
WP: When the Write Protect input pin is forced HIGH by an
external source, all write operations are inhibited. When the
pin is not driven by an external source, it is pulled LOW
internally.
Functional Description
The CAT24AA01/02 supports the Inter ? Integrated
Circuit (I 2 C) Bus protocol. The protocol relies on the use of
a Master device, which provides the clock and directs bus
traffic, and Slave devices which execute requests. The
CAT24AA01/02 operates as a Slave device. Both Master
and Slave can transmit or receive, but only the Master can
assign those roles.
I 2 C BUS PROTOCOL
The 2 ? wire I 2 C bus consists of two lines, SCL and SDA,
connected to the V CC supply via pull ? up resistors. The
Master provides the clock to the SCL line, and the Master
and Slaves drive the SDA line. A ‘0’ is transmitted by
pulling a line LOW and a ‘1’ by releasing it HIGH. Data
transfer may be initiated only when the bus is not busy (see
A.C. Characteristics). During data transfer, SDA must
remain stable while SCL is HIGH.
START/STOP Condition
An SDA transition while SCL is HIGH creates a START
or STOP condition (Figure 2). A START is generated by a
HIGH to LOW transition, while a STOP is generated by a
LOW to HIGH transition. The START acts like a wake ? up
call. Absent a START, no Slave will respond to the Master.
The STOP completes all commands.
Device Addressing
The Master addresses a Slave by creating a START
condition and then broadcasting an 8 ? bit Slave address
(Figure 3). The four most significant bits of the Slave
address are 1010 (Ah).
For the CAT24AA01/02 the next three bits must be 000.
The last bit, R/W, instructs the Slave to either provide (1)
or accept (0) data, i.e. it signals a Read (1) or a Write (0)
request.
Acknowledge
During the 9 th clock cycle following every byte sent onto
the bus, the transmitter releases the SDA line, allowing the
receiver to respond. The receiver then either acknowledges
(ACK) by pulling SDA LOW, or does not acknowledge
(NoACK) by letting SDA stay HIGH (Figure 4). Bus timing
is illustrated in Figure 5.
SCL
SDA
START
CONDITION
Figure 2. Start/Stop Timing
STOP
CONDITION
1
0
1
0
0
0
0
R/W
Figure 3. Slave Address Bits
http://onsemi.com
4
发布紧急采购，3分钟左右您将得到回复。

采购需求

(若只采购一条型号，填写一行即可)

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

*型号 *数量 厂商 批号 封装
添加更多采购

我的联系方式

*
*
*
相关PDF资料
CAT24C01ZI-G IC EEPROM SERIAL 1KB I2C 8MSOP
CAT24C03WI-G IC EEPROM SERIAL 2KB I2C 8SOIC
CAT24C04ZI-G IC EEPROM SERIAL 4KB I2C 8MSOP
CAT24C05YI-G IC EEPROM SERIAL 4KB I2C 8TSSOP
CAT24C08TDI-GT3 8KB I2C SER EEPROM TSOT 23
CAT24C128HU4IGT3 IC EEPROM 128KB I2C SRL 8UDFN
CAT24C164YI-G IC EEPROM SERIAL 16KB I2C 8TSSOP
CAT24C208WI-GT3 IC EEPROM SER 8KB 400KHZ 8SOIC
相关代理商/技术参数
CAT24AA02WI-G10 制造商:CATALYST 制造商全称:Catalyst Semiconductor 功能描述:1-Kb and 2-Kb I2C CMOS Serial EEPROM
CAT24AA02WI-G3 制造商:CATALYST 制造商全称:Catalyst Semiconductor 功能描述:1-Kb and 2-Kb I2C CMOS Serial EEPROM
CAT24AA02WI-GT 制造商:CATALYST 制造商全称:Catalyst Semiconductor 功能描述:1-Kb and 2-Kb I2C CMOS Serial EEPROM
CAT24AA02WI-GT10 制造商:ONSEMI 制造商全称:ON Semiconductor 功能描述:1-Kb and 2-Kb I2C CMOS Serial EEPROM
CAT24AA02WI-GT3 功能描述:电可擦除可编程只读存储器 2K-Bit I2C Serial 电可擦除可编程只读存储器 RoHS:否 制造商:Atmel 存储容量:2 Kbit 组织:256 B x 8 数据保留:100 yr 最大时钟频率:1000 KHz 最大工作电流:6 uA 工作电源电压:1.7 V to 5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8
CAT24AA02WI-T 制造商:CATALYST 制造商全称:Catalyst Semiconductor 功能描述:1-Kb and 2-Kb I2C CMOS Serial EEPROM
CAT24AA02WI-T10 制造商:ONSEMI 制造商全称:ON Semiconductor 功能描述:1-Kb and 2-Kb I2C CMOS Serial EEPROM
CAT24AA02WI-T3 制造商:ONSEMI 制造商全称:ON Semiconductor 功能描述:1-Kb and 2-Kb I2C CMOS Serial EEPROM