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参数资料
| 型号： | MAX6884ETP+ |
| 厂商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分类： | 电源管理 |
| 英文描述： | EEPROM-Programmable, Hex, Power-Supply Supervisors with an ADC |
| 中文描述： | 1-CHANNEL POWER SUPPLY MANAGEMENT CKT, QCC20 |
| 封装： | 5 X 5 MM, 0.80 MM PITCH, MO-220WHHC, QFN-20 |
| 文件页数： | 20/34页 |
| 文件大小： | 310K |
| 代理商： | MAX6884ETP+ |
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MAX6884/MAX6885
EEPROM-Programmable, Hex
Power-Supply Supervisory Circuits
______________________________________________________________________________________
27
SCL
1
S
2
89
SDA BY
TRANSMITTER
SDA BY
RECEIVER
START
CONDITION
CLOCK PULSE FOR ACKNOWLEDGE
Figure 9. Acknowledge
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 (see Figure 8) by transitioning
SDA from high to low while SCL is high. The master
device issues a STOP (P) condition (see Figure 8) by
transitioning 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 generated, such as in the block read protocol (see
Figure 11).
Early STOP Conditions
The MAX6884/MAX6885 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.
Repeated START Conditions
A REPEATED START (SR) condition may indicate a
change of data direction on the bus. Such a change
occurs when a command word is required to initiate a
read operation (see Figure 11). SR may also be used
when the bus master is writing to several I2C devices
and does not want to relinquish control of the bus. The
MAX6884/MAX6885 serial interface supports continu-
ous write operations with or without an SR condition
separating them. Continuous read operations require
SR conditions because of the change in direction of
data flow.
Acknowledge
The acknowledge bit (ACK) is the 9th bit attached to any
8-bit data word. The receiving device always generates
an ACK. The MAX6884/MAX6885 generate an ACK
when receiving an address or data by pulling SDA low
during the 9th clock period (see Figure 9). When trans-
mitting data, such as when the master device reads data
back from the MAX6884/MAX6885, the MAX6884/
MAX6885 wait for the master device to generate an ACK.
Monitoring ACK allows for detection of unsuccessful
data transfers. An unsuccessful data transfer occurs if
the receiving device is busy or if a system fault has
occurred. In the event of an unsuccessful data transfer,
the bus master should reattempt communication at a
later time. The MAX6884/MAX6885 generate a NACK
after the command byte during a software reboot, while
writing to the EEPROM, or when receiving an illegal
memory address.
Slave Address
The MAX6884/MAX6885 slave address conforms to the
following table:
SA7
(MSB)
SA6
SA5
SA4
SA3
SA2
SA1
SA0
(LSB)
10
0
A0
X
R/W
X = Don’t care.
相关PDF资料 |
PDF描述 |
|---|---|
| MAX6885ETP+ | EEPROM-Programmable, Hex, Power-Supply Supervisors with an ADC |
| MAX6886ETP+ | Pin-Selectable, Hex Power-Supply Supervisory Circuit |
| MAX6886ETP+T | Pin-Selectable, Hex Power-Supply Supervisory Circuit |
| MAX6887AETE+ | Hex/Quad, Power-Supply Supervisory Circuits |
| MAX6887AETE+T | Hex/Quad, Power-Supply Supervisory Circuits |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX6884ETP+ | 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 |
| MAX6884ETP+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 |
| MAX6884ETP-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 |
| MAX6884EVCMOD2 | 功能描述:监控电路 Programmers, Development Systems 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 |
| MAX6884EVKIT | 功能描述:监控电路 Programmers, Development Systems 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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