收藏本站
CAT24C21
Transmit ? Only Mode: (DDC1)
Upon power ? up, the CAT24C21 will output valid data
only after it has been initialized. During initialization, data
will not be available until after the first nine clocks are sent
to the device (Figure 3). The starting address for the
transmit ? only mode can be determined during initialization.
If the SDA pin is high during the first eight clocks, the
starting address will be 7FH. If the SDA pin is low during the
first eight clocks, the starting address will be 00H. During
the ninth clock, SDA will be in the high impedance state.
Transmit ? Only Mode
Data is transmitted in 8 bit words with the most significant
bit first, followed by a 9th ‘don’t care’ bit which will be in
the high impedance state (Figure 4). The CAT24C21 will
continuously sequence through the entire memory array as
long as VCLK is present and no falling edges on SCL are
detected. When the maximum address (7FH) is reached,
addressing will wrap around to the zero location (00H) and
transmitting will continue. The bi ? directional mode clock
(SCL) pin must be held high for the device to remain in the
transmit ? only mode.
Bi ? Directional Mode
SCL
T VHZ
SDA
VCLK
Figure 2. Mode Transition
SCL
SDA at high impedance for 9 clock cycles
SDA
Bit8
Bit7
Bit6
Bit5
Bit4
VCLK
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
T VPU
T VAA
Figure 3. Device Initialization for Transmit ? only Mode
SCL must remain high for transmit ? only mode
SCL
Don’t
SDA
Bit8
(MSB)
Bit7
Bit6
Bit5
Bit4
Bit3
Bit2
Bit1 Bit8
(LSB) Care
Bit7
VCLK
T VHIGH
T VLOW
Figure 4. Transmit ? Only Mode
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
CAT24C256XI-T2 IC EEPROM 256KBIT 400KHZ 8SOIC
CAT24C32HU3I-GT3 IC EEPROM 32KB I2C SERIAL 8UDFN
CAT24C32TSI-T3 IC EEPROM SRL 32KB I2C 5TSOP
CAT24C512HU5IGT3 IC EEPROM SRL 512KB I2C 8UDFN
CAT24C512XI IC EEPROM I2C SRL 512KB 8SOIC
CAT24C64ZI-GT3 IC EEPROM I2C SRL 64KB 8MSOP
CAT24M01XI IC EEPROM I2C SRL 1MB 8SOIC
CAT24M01YI-GT3 IC EEPROM SRL 1MB I2C 8TSSOP
相关代理商/技术参数
CAT24C21WGI 制造商:Rochester Electronics LLC 功能描述: 制造商:Catalyst Semiconductor 功能描述:
CAT24C21WGI-T3 制造商:Rochester Electronics LLC 功能描述: 制造商:Catalyst Semiconductor 功能描述:
CAT24C21WI 功能描述:电可擦除可编程只读存储器 1K Dual Mode Serial 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
CAT24C21WI-G 制造商:Rochester Electronics LLC 功能描述: 制造商:ON Semiconductor 功能描述:
CAT24C21WI-GT3 功能描述:电可擦除可编程只读存储器 1K DUAL MODE SER 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
CAT24C21WI-T3 制造商:ON Semiconductor 功能描述:1K DUAL MODE SERIAL EEPROM - Tape and Reel
CAT24C21ZI 制造商:Catalyst Semiconductor 功能描述:
CAT24C256HU4IGT3 功能描述:电可擦除可编程只读存储器 LOW-SATURATION VOLTAGE 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