参数资料
型号: MAX6884ETP+
厂商: Maxim Integrated Products
文件页数: 20/34页
文件大小: 0K
描述: IC SUPERVISOR PWR SPL 20-TQFN
产品培训模块: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
标准包装: 60
类型: 多压监控器
监视电压数目: 6
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: 6 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: 20-WQFN 裸露焊盘
供应商设备封装: 20-TQFN-EP(5x5)
包装: 管件
EEPROM-Programmable, Hex
Power-Supply Supervisory Circuits
WDO
The MAX6884/MAX6885 offer a separate output for the
watchdog timer system. WDO is active low and program-
mable for open-drain or weak pullup. Program WDO to
assert RESET when the watchdog timer expires. See the
Configuring the Watchdog Timer section for a complete
description of the watchdog timer system.
Configuring the Watchdog Timer
A watchdog timer monitors microprocessor (μP) soft-
ware execution for a stalled condition and resets the μP
2.5V
V CC OR IN1–IN4
WDO
RESET
WDI
if it stalls. The output of the watchdog timer ( WDO ) con-
nects to the reset input or a nonmaskable interrupt of
the μP. Program R15h to configure the watchdog timer
functions (see Table 8). The watchdog timer features
independent initial and normal watchdog timeout peri-
ods between 6.25ms and 102.4s (see Figure 4).
The initial watchdog timeout period (t WDI ) is active
immediately after power-up, after a reset event takes
place, after enabling the watchdog timer, or after the
watchdog timer expires. The initial watchdog timeout
period allows the μP to perform its initialization process.
t D-PO
t RP
*t WDI
t WD
*t WDI
RESET NOT DEPENDENT ON WDO
2.5V
V CC OR IN1–IN4
WDO
RESET
WDI
t D-PO
t RP
*t WDI
t WD
t RP
*t WDI
*t WDI IS THE INITIAL WATCHDOG TIMEOUT PERIOD.
Figure 4. Watchdog Timing Diagrams
WDO CONNECTED TO MR.
20
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相关代理商/技术参数
参数描述
MAX6884ETP+ 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
MAX6884ETP+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
MAX6884ETP-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
MAX6884EVCMOD2 功能描述:监控电路 Programmers, Development Systems 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
MAX6884EVKIT 功能描述:监控电路 Programmers, Development Systems 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