- 您现在的位置：买卖IC网 > PDF目录229281 > MAX6891ETP (MAXIM INTEGRATED PRODUCTS INC) EEPROM-Programmable, Octal/Hex/Quad, Power-Supply Sequencers/Supervisors PDF资料下载
参数资料
| 型号： | MAX6891ETP |
| 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： | 4-CHANNEL POWER SUPPLY MANAGEMENT CKT, PQCC20 |
| 封装： | 5 X 5 MM, TQFN-20 |
| 文件页数： | 8/40页 |
| 文件大小： | 255K |
| 代理商： | MAX6891ETP |
第1页第2页第3页第4页第5页第6页第7页当前第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页第40页
MAX6889/MAX6890/MAX6891
EEPROM-Programmable, Octal/Hex/Quad,
Power-Supply Sequencers/Supervisors
16
______________________________________________________________________________________
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
10A 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 10A current sink for 1V < VCC < VUVLO.
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 25s 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.
REGISTER
ADDRESS
EEPROM
MEMORY
ADDRESS
BIT
RANGE
DESCRIPTION
07h
87h
[7:0]
IN8 undervoltage detector threshold (V8) (see equations in the Inputs section)
08h
88h
[7]
IN8 range selection.
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 4. IN8 Threshold Settings
REGISTER
ADDRESS
EEPROM
ADDRESS
BIT
RANGE
DESCRIPTION
[0]
GPI1. 0 = active-low, 1 = active-high.
[1]
GPI2. 0 = active-low, 1 = active-high.
[2]
GPI3. 0 = active-low, 1 = active-high.
28h
A8h
[3]
GPI4 (MAX6889/MAX6890 only). 0 = active-low, 1 = active-high.
Table 5. GPI1–GPI4 Active Logic States
相关PDF资料 |
PDF描述 |
|---|---|
| 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 |
| MG200-BCR2 | T-1 3/4 SINGLE COLOR LED, RED, 5.1 mm |
相关代理商/技术参数 |
参数描述 |
|---|---|
| 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 |
| MAX6891ETP-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 |
| MAX6892ETJ | 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 |
| MAX6892ETJ+ | 功能描述:监控电路 Pin-Selectable 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 |
发布紧急采购，3分钟左右您将得到回复。