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参数资料
| 型号： | MAX6873ETJ+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 33/48页 |
| 文件大小： | 0K |
| 描述： | IC SEQUENCE/SUPERVISOR 32TQFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 类型： | 序列发生器 |
| 监视电压数目： | 4 |
| 输出： | 开路漏极，推挽式 |
| 复位： | 高有效/低有效 |
| 复位超时： | 可调节/可选择 |
| 电压 - 阀值： | 5 种可调阀值电压 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 32-WFQFN 裸露焊盘 |
| 供应商设备封装： | 32-TQFN-EP（5x5） |
| 包装： | 带卷 (TR) |
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EEPROM-Programmable, Hex/Quad,
Power-Supply Sequencers/Supervisors
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 MAX6872/MAX6873 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 I 2 C format. At least one clock
pulse must separate any START and STOP conditions.
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 7). SR may also be used
Acknowledge
The acknowledge bit (ACK) is the 9th bit attached to any
8-bit data word. The receiving device always generates
an ACK. The MAX6872/MAX6873 generate an ACK
when receiving an address or data by pulling SDA low
during the 9th clock period ( Figure 5). When transmitting
data, such as when the master device reads data back
from the MAX6872/MAX6873, the MAX6872/MAX6873
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 MAX6872/MAX6873 generate a NACK
after the slave address during a software reboot, while
writing to the EEPROM, or when receiving an illegal
memory address.
Slave Address
The MAX6872/MAX6873 slave address conforms to the
following table :
when the bus master is writing to several I 2 C devices
and does not want to relinquish control of the bus. The
MAX6872/MAX6873 serial interface supports continu-
ous write operations with or without an SR condition
SA7
(MSB)
1
SA6
0
SA5
1
SA4
0
SA3
A1
SA2
A0
SA1
X
SA0
(LSB)
R/ W
separating them. Continuous read operations require
SR conditions because of the change in direction of
data flow.
START
CONDITION
X = Don’t care.
CLOCK PULSE FOR ACKNOWLEDGE
SCL
1
2
8
9
SDA BY
TRANSMITTER
S
SDA BY
RECEIVER
Figure 5. Acknowledge
______________________________________________________________________________________
33
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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 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+ | 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: |
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