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| 型号： | MAX6889ETJ+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 13/40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 1. Programmable Features
FEATURE
High-Voltage Input IN1
Positive Voltage Input
IN2–IN7 (MAX6889)
IN2–IN6 (MAX6890)
IN2–IN4 (MAX6891)
High-Voltage Input IN8
(MAX6889)
Programmable Outputs
PO1–PO10 (MAX6889)
PO1–PO8 (MAX6890)
PO1–PO5 (MAX6891)
General-Purpose Logic Inputs:
GPI1–GPI4
(MAX6889–MAX6890)
DESCRIPTION
? 2.5V to 13.2V threshold in 50mV increments.
? 1.25V to 7.625V threshold in 25mV increments.
? 1V to 5.5V threshold in 20mV increments.
? 0.5V to 3.05V threshold in 10mV increments.
? 0.1667V to 1.0167V threshold in 3.3mV increments in high-Z mode.
? 2.5V to 15.25V threshold in 50mV increments.
? 1.25V to 7.625V threshold in 25mV increments.
? 0.1667V to 1.0167V threshold in 3.3mV increments in high-Z mode.
? Active-high or active-low.
? Open-drain or weak pullup output.
? Dependent on MR , MARGIN , IN_, GPI_, and WD.
? Programmable reset timeout periods of 25μs, 1.5625ms, 6.25ms, 25ms, 50ms, 200ms, 400ms,
or 1.6s.
? Active-high or active-low logic levels.
? Configure GPI_ as inputs to the watchdog timer or the programmable output stages.
GPI1–GPI3 (MAX6891)
? Clear dependent on any combination of one GPI_ input and one programmable output, a GPI_
input only, or a programmable output only.
Watchdog Timer
Manual Reset Input ( MR )
V CC Power Mode
Write Disable
Configuration Lock
? Initial watchdog timeout period of 6.25ms, 25ms, 100ms, 400ms, 1.6s, 6.4s, 25.6s, or 102.4s.
? Normal watchdog timeout period of 6.25ms, 25ms, 100ms, 400ms, 1.6s, 6.4s, 25.6s, or 102.4s.
? Watchdog enable/disable.
? Forces PO_ into the active output state when MR = GND.
? PO_ deassert after MR releases high and the PO_ timeout period expires.
Programs whether the device is powered from the highest IN_ input or from an external supply
connected to V CC .
Locks user EEPROM based on PO_.
Locks configuration registers and EEPROM.
Powering the
MAX6889/MAX6890/MAX6891
The MAX6889/MAX6890/MAX6891 derive power from
the voltage detector inputs: IN1 –IN5 (MAX6889/
MAX6890), IN1–IN4 (MAX6891), or an external V CC
supply. A virtual diode-ORing scheme selects the posi-
tive input that supplies power to the device (see the
Functional Diagram). IN1 must be at least 4V, or one of
IN2 –IN5 (MAX6889/MAX6890)/IN2 –IN4 (MAX6891)
must be at least 2.7V to ensure device operation. An
internal LDO regulates IN1 down to 5.4V.
The highest input voltage on IN2 –IN5 (MAX6889/
MAX6890)/IN2–IN4 (MAX6891) supplies power to the
device, unless V IN1 > 6.5V, in which case IN1 supplies
power to the device. For 4V < V IN1 < 6.5V and one of
V IN2 –V IN5 > 2.7V, the input power source cannot be
determined due to the dropout voltage of the LDO.
Internal hysteresis ensures that the supply input that ini-
tially powered the device continues to power the device
when multiple input voltages are within 50mV of
each other.
V CC powers the analog circuitry. Bypass V CC to GND
with a 1μF ceramic capacitor installed as close to the
device as possible. The internal supply voltage, mea-
sured at V CC , equals the maximum of IN2–IN5 if V IN1 =
0V, or equals 5.4V when V IN1 > 6.5V. Do not use the
internally generated V CC to provide power to external
circuitry. Power cannot be supplied through high-
impedance voltage detector inputs. To externally sup-
ply power through V CC :
______________________________________________________________________________________
13
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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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