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| 型号： | MAX6889ETJ+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 16/40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： | 60 |
| 类型： | 序列发生器 |
| 监视电压数目： | 8 |
| 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： | 8 种可选阀值组合 |
| 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： | 管件 |
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EEPROM-Programmable, Octal/Hex/Quad,
Power-Supply Sequencers/Supervisors
Table 4. IN8 Threshold Settings
REGISTER
ADDRESS
07h
EEPROM
MEMORY
ADDRESS
87h
BIT
RANGE
[7:0]
DESCRIPTION
IN8 undervoltage detector threshold (V8) (see equations in the Inputs section)
IN8 range selection.
08h
88h
[7]
0 = 2.5V to 15.25V range in 50mV increments.
1 = 1.25V to 7.625V range in 25mV increments.
09h
89h
[7]
IN8 input impedance. 0 = normal mode. 1 = high-Z mode, with a 0.1667V to 1.0167V
range in 3.3mV increments.
Table 5. GPI1–GPI4 Active Logic States
REGISTER
ADDRESS
28h
EEPROM
ADDRESS
A8h
BIT
RANGE
[0]
[1]
[2]
[3]
DESCRIPTION
GPI1. 0 = active-low, 1 = active-high.
GPI2. 0 = active-low, 1 = active-high.
GPI3. 0 = active-low, 1 = active-high.
GPI4 (MAX6889/MAX6890 only). 0 = active-low, 1 = active-high.
MARGIN
MARGIN allows system-level testing while power sup-
plies exceed the normal ranges. Driving MARGIN low
forces the programmable outputs to hold the last state
while system-level testing occurs. Leave MARGIN
unconnected or connect to DBP if unused. An internal
10μA current source pulls MARGIN to DBP. The state of
each programmable output does not change while
MARGIN = GND. MARGIN overrides MR if both assert
at the same time.
Programmable Outputs
The MAX6889 features ten programmable outputs, the
MAX6890 features eight programmable outputs, and
the MAX6891 features five programmable outputs.
Selectable output stage configurations include: active-
low or active-high, open drain, or weak pullup. During
power-up, the programmable outputs pull to GND with
an internal 10μA current sink for 1V < V CC < V UVLO .
The programmable outputs remain in their active states
until their respective PO timeout period expires, and all
of the programmed conditions are met for each output.
Any output programmed to depend on no condition
always remains in its active state (Table 17). An output
configured as active-high is considered asserted when
that output is logic-high.
The voltage monitors generate fault signals (logical 0) to
the MAX6889/MAX6890/MAX6891s’ logic array when an
input voltage is below the programmed undervoltage
threshold. For example, the PO3 (Table 9) programmable
output may depend on the IN1 undervoltage threshold,
and the state of GPI1. Write “1”s to R10h[0] and R11h[1]
to configure as indicated. IN1 must be above the under-
voltage threshold (Table 2) and GPI1 must be inactive
(Table 5) to be a logic “1,” then PO3 deasserts. The logic
state of PO3, in this example, is equivalent to the logical
statement: “V1 · GPI1.”
Registers 0Ah through 27h configure each of the pro-
grammable outputs. Programmable timing blocks set
the PO_ timeout period from 25μs to 1600ms for each
programmable output. See Table 17 to set the active
state (active-high or active-low) for each programmable
output and Tables 18 and 19 to select the output stage
types, and PO_ timeout periods for each output. Each
programmable output allows a different set of condi-
tions to assert each output as shown in Tables 7–16.
16
______________________________________________________________________________________
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX6889ETJ+ | 功能描述:监控电路 EEPROM-Prog Octal 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 |
| MAX6889ETJ+T | 功能描述:监控电路 EEPROM-Prog Octal 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 |
| MAX6889ETJ-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 |
| MAX6889EVCMAXQ | 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 |
| MAX6889EVCMAXQU | 功能描述:监控电路 Evaluation Kit/Evaluation System for the MAX6889 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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