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参数资料
| 型号： | MAX6890ETI |
| 厂商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分类： | 电源管理 |
| 英文描述： | EEPROM-Programmable, Octal/Hex/Quad, Power-Supply Sequencers/Supervisors |
| 中文描述： | 6-CHANNEL POWER SUPPLY MANAGEMENT CKT, PQCC28 |
| 封装： | 5 X 5 MM, TQFN-28 |
| 文件页数： | 29/40页 |
| 文件大小： | 255K |
| 代理商： | MAX6890ETI |
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MAX6889/MAX6890/MAX6891MAX6889/MAX6890/MAX6891MAX6889/MAX6890/MAX6891MAX6889/MAX6890/MAX6891MAX6889/MAX6890/MAX6891MAX6889/MAX6890/MAX6891MAX6889/MAX6890/MAX6891
EEPROM-Programmable, Octal/Hex/Quad,
Power-Supply Sequencers/Supervisors
______________________________________________________________________________________
35
WRITE BYTE FORMAT
S
ADDRESS
7 bits
SEND BYTE FORMAT
WR
ACK
DATA
8 bits
ACK
P
Data Byte–presets the
internal address pointer
or represents a command.
BLOCK WRITE FORMAT
S
ADDRESS
WR
ACK
COMMAND
ACK
BYTE
COUNT= N
ACK
DATA BYTE
1
ACK
DATA BYTE
...
ACK
DATA BYTE
N
ACK
P
7 bits
C0h
8 bits
Slave Address–
equivalent to chip-
select line of a 3-
wire interface.
Command Byte–
prepares device
for block
write operation.
Data Byte–first data goes into the address preset
with a previous "Set Address" and the following data
in the following locations.
BLOCK READ FORMAT
S
ADDRESS
WR
ACK
COMMAND
ACK
SR
ADDRESS
WR
ACK
8 bits
BYTE
COUNT = N
ACK
DATA BYTE
1
ACK
DATA BYTE
...
ACK
DATA BYTE
N
ACK
P
7 bits
C1h
7 bits
8 bits
Slave Address–
equivalent to chip-
select line of a 3-
wire interface.
Command Byte–
prepares device
for block
operation.
Slave Address–
equivalent to chip-
select line of a 3-
wire interface.
Data Byte–data comes from the address set by a
previous "send byte".
S = Start condition.
P = Stop condition.
Shaded = Slave transmission.
SR = Repeated start condition.
Slave Address–
equivalent to chip-
select line of a 3-
wire interface.
S
ADDRESS
WR
ACK
COMMAND
ACK
DATA
ACK
P
7 bits
8 bits
Slave Address–
equivalent to chip-
select line of a 3-
wire interface.
Command Byte–
selects register
EEPROM location you
are writing to.
Data Byte–data goes into the
register (or EEPROM location)
set by the command byte.
0
1
0
READ BYTE FORMAT
S
ADDRESS
WR
ACK
DATA
ACK
SR
ACK
DATA
ACK
P
7 bits
8 bits
Slave Address–
equivalent to chip-
select line of a
3-wire interface.
Data Byte—presets
the internal address
pointer.
Data Byte–data read
from the preset register
(or EEPROM) address.
0
ADDRESS
WR
7 bits
1
Slave Address—
equivalent to chip-
select line of a
3-wire interface.
Figure 8. SMBus/I2C Protocols
Applications Information
Configuration Download at Power-up
The configuration of the MAX6889/MAX6890/MAX6891
(undervoltage thresholds, PO_ timeout periods, watch-
dog behavior, programmable output conditions and
configurations, etc.) depends on the contents of the
EEPROM. The EEPROM is comprised of buffered latch-
es that store the configuration. The local volatile memo-
ry latches lose their contents at power-down. Therefore,
at power-up, the device configuration must be restored
by downloading the contents of the EEPROM (non-
volatile memory) to the local latches. This download
occurs in a number of steps:
1) Programmable outputs go high impedance with no
power applied to the device.
2) When VCC exceeds 1V, all programmable outputs are
weakly pulled to GND through a 10A current sink.
3) When VCC exceeds UVLO, the configuration
EEPROM starts to download its contents to the
volatile configuration registers. The programmable
outputs assume their programmed conditional out-
put state when VCC exceeds UVLO.
相关PDF资料 |
PDF描述 |
|---|---|
| MAX6891ETP | EEPROM-Programmable, Octal/Hex/Quad, Power-Supply Sequencers/Supervisors |
| MG200-BCG24HD | T-1 3/4 SINGLE COLOR LED, GREEN, 5.1 mm |
| MG200-BCG24H | T-1 3/4 SINGLE COLOR LED, GREEN, 5.1 mm |
| MG200-BCG28HD | T-1 3/4 SINGLE COLOR LED, GREEN, 5.1 mm |
| MG200-BCG5H | T-1 3/4 SINGLE COLOR LED, GREEN, 5.1 mm |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX6890ETI+ | 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 |
| MAX6890ETI-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 |
| MAX6891ETP | 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 |
| MAX6891ETP+ | 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 |
| MAX6891ETP+T | 功能描述:监控电路 EEPROM-Programmable Octal/Hex/Quad Power-Supply Sequencers/Supervisors 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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