参数资料
型号: MAX6884ETP+
厂商: MAXIM INTEGRATED PRODUCTS INC
元件分类: 电源管理
英文描述: EEPROM-Programmable, Hex, Power-Supply Supervisors with an ADC
中文描述: 1-CHANNEL POWER SUPPLY MANAGEMENT CKT, QCC20
封装: 5 X 5 MM, 0.80 MM PITCH, MO-220WHHC, QFN-20
文件页数: 13/34页
文件大小: 310K
代理商: MAX6884ETP+
MAX6884/MAX6885
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 (P) soft-
ware execution for a stalled condition and resets the P
if it stalls. The output of the watchdog timer (WDO) con-
nects to the reset input or a nonmaskable interrupt of
the P. 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 (tWDI) 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 P to perform its initialization process.
EEPROM-Programmable, Hex
Power-Supply Supervisory Circuits
20
______________________________________________________________________________________
WDO
WDI
tRP
*tWDI
tWD
tD-PO
RESET
VCC OR IN1–IN4
RESET NOT DEPENDENT ON WDO
2.5V
tRP
*tWDI
tWD
tD-PO
WDO CONNECTED TO MR.
WDI
VCC OR IN1–IN4
2.5V
*tWDI IS THE INITIAL WATCHDOG TIMEOUT PERIOD.
WDO
RESET
Figure 4. Watchdog Timing Diagrams
相关PDF资料
PDF描述
MAX6885ETP+ EEPROM-Programmable, Hex, Power-Supply Supervisors with an ADC
MAX6886ETP+ Pin-Selectable, Hex Power-Supply Supervisory Circuit
MAX6886ETP+T Pin-Selectable, Hex Power-Supply Supervisory Circuit
MAX6887AETE+ Hex/Quad, Power-Supply Supervisory Circuits
MAX6887AETE+T Hex/Quad, Power-Supply Supervisory Circuits
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