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参数资料
| 型号： | MAX6874ETJ |
| 厂商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分类： | 电源管理 |
| 英文描述： | EEPROM-Programmable, Hex/Quad, Power-Supply Sequencers/Supervisors |
| 中文描述： | 6-CHANNEL POWER SUPPLY MANAGEMENT CKT, QCC32 |
| 封装： | 7 X 7 MM, 0.80 MM HEIGHT, MO-220, TQFN-32 |
| 文件页数： | 18/40页 |
| 文件大小： | 337K |
| 代理商： | MAX6874ETJ |
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MAX6874/MAX6875
EEPROM-Programmable, Hex/Quad,
Power-Supply Sequencers/Supervisors
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25
A master device communicates to the MAX6874/
MAX6875 by transmitting the proper address followed by
command and/or data words. Each transmit sequence is
framed by a START (S) or REPEATED START (SR) condi-
tion and a STOP (P) condition. Each word transmitted
over the bus is 8 bits long and is always followed by an
acknowledge pulse.
SCL is a logic input, while SDA is a logic input/open-
drain output. SCL and SDA both require external pullup
resistors to generate the logic-high voltage. Use 4.7k
for most applications.
Bit Transfer
Each clock pulse transfers one data bit. The data on
SDA must remain stable while SCL is high (Figure 3),
otherwise the MAX6874/MAX6875 register a START or
STOP condition (Figure 4) from the master. SDA and
SCL idle high when the bus is not busy.
Start and Stop Conditions
Both SCL and SDA idle high when the bus is not busy. A
master device signals the beginning of a transmission
with a START (S) condition (Figure 4) by transitioning
SDA from high to low while SCL is high. The master
device issues a STOP (P) condition (Figure 4) by transi-
tioning SDA from low to high while SCL is high. A STOP
condition frees the bus for another transmission. The bus
remains active if a REPEATED START condition is gener-
ated, such as in the block read protocol (see Figure 7).
Early STOP Conditions
The MAX6874/MAX6875 recognize a STOP condition at
any point during transmission except if a STOP condition
occurs in the same high pulse as a START condition. This
condition is not a legal I2C format. At least one clock
pulse must separate any START and STOP condition.
STOP
CONDITION
REPEATED START
CONDITION
START
CONDITION
tHIGH
tLOW
tR
tF
tSU:DAT
tSU:STA
tSU:STO
tHD:STA
tBUF
tHD:STA
tHD:DAT
SCL
SDA
START
CONDITION
Figure 2. Serial-Interface Timing Details
DATA LINE STABLE,
DATA VALID
SDA
SCL
CHANGE OF
DATA ALLOWED
P
S
START
CONDITION
SDA
SCL
STOP
CONDITION
Figure 3. Bit Transfer
Figure 4. Start and Stop Conditions
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX6874ETJ+ | 功能描述:监控电路 EEPROM-Prog Hex Power-Sup Sequencer RoHS:否 制造商:STMicroelectronics 监测电压数: 监测电压: 欠电压阈值: 过电压阈值: 输出类型:Active Low, Open Drain 人工复位:Resettable 监视器:No Watchdog 电池备用开关:No Backup 上电复位延迟（典型值）:10 s 电源电压-最大:5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:UDFN-6 封装:Reel |
| MAX6874ETJ+T | 功能描述:监控电路 EEPROM-Prog Hex Power-Sup Sequencer RoHS:否 制造商:STMicroelectronics 监测电压数: 监测电压: 欠电压阈值: 过电压阈值: 输出类型:Active Low, Open Drain 人工复位:Resettable 监视器:No Watchdog 电池备用开关:No Backup 上电复位延迟（典型值）:10 s 电源电压-最大:5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:UDFN-6 封装:Reel |
| MAX6874ETJ-T | 功能描述:监控电路 RoHS:否 制造商:STMicroelectronics 监测电压数: 监测电压: 欠电压阈值: 过电压阈值: 输出类型:Active Low, Open Drain 人工复位:Resettable 监视器:No Watchdog 电池备用开关:No Backup 上电复位延迟（典型值）:10 s 电源电压-最大:5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:UDFN-6 封装:Reel |
| MAX6874TCC+ | 制造商:Maxim Integrated Products 功能描述: |
| MAX6875ETJ | 功能描述:监控电路 RoHS:否 制造商:STMicroelectronics 监测电压数: 监测电压: 欠电压阈值: 过电压阈值: 输出类型:Active Low, Open Drain 人工复位:Resettable 监视器:No Watchdog 电池备用开关:No Backup 上电复位延迟（典型值）:10 s 电源电压-最大:5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:UDFN-6 封装:Reel |
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