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| 型号： | MAX16068ETI+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 21/41页 |
| 文件大小： | 0K |
| 描述： | IC SYSTEM MANAGER 6CH 28-TQFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 应用： | 六路电源监控器 |
| 电源电压： | 2.8 V ~ 14 V |
| 电流 - 电源： | 2.8mA |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 28-WFQFN 裸露焊盘 |
| 供应商设备封装： | 28-TQFN-EP（5x5） |
| 包装： | 带卷 (TR) |
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6-Channel, Flash-Configurable System Manager
with Nonvolatile Fault Registers
Watchdog Timer
The watchdog timer operates together with or indepen-
dently of the MAX16068. When operating in dependent
mode, the watchdog is not activated until RESET is
deasserted. When operating in independent mode,
the watchdog timer activates immediately after V CC
exceeds the UVLO threshold and the boot phase is
complete. Set r73h[4] to ‘0’ to configure the watchdog
in dependent mode. Set r73h[4] to ‘1’ to configure the
watchdog in independent mode. See Table 16 for more
information on configuring the watchdog timer in depen-
dent or independent mode. The watchdog timer can be
reset by toggling the WDI inputs (GPIO4) or by writing a
‘1’ to r75h[5].
Dependent Watchdog Timer Operation
Use the watchdog timer to monitor F P activity in two
modes. Flexible timeout architecture provides an adjust-
able watchdog startup delay of up to 300s, allowing
complicated systems to complete lengthy boot-up rou-
tines. An adjustable watchdog timeout allows the super-
visor to provide quick alerts when the processor activity
fails. After each reset event (V CC drops below UVLO
V TH
LAST MON_
WDI
then returns above UVLO, software reboot, manual reset
( MR ), EN input going low then high, or watchdog reset),
the watchdog startup delay provides an extended time
for the system to power up and fully initialize all F P and
system components before assuming responsibility for
routine watchdog updates. Set r76h[6:4] to a value other
than ‘000’ to enable the watchdog startup delay. Set
r76h[6:4] to ‘000’ to disable the watchdog startup delay.
The normal watchdog timeout period, t WDI , begins after
the first transition on WDI before the conclusion of the
long startup watchdog period, t WDI_STARTUP (Figures 3
and 4). During the normal operating mode, WDO asserts
if the F P does not toggle WDI with a valid transition (high-
to-low or low-to-high) within the standard timeout period,
t WDI . WDO remains asserted until WDI is toggled or
RESET is asserted (Figure 4).
While EN is low, the watchdog timer is in reset. The
watchdog timer does not begin counting until the moni-
toring starts and RESET is deasserted. The watchdog
timer is reset and WDO deasserts any time RESET is
asserted (Figure 5). The watchdog timer is held in reset
while RESET is asserted.
< t WDI
t WDI_STARTUP
< t WDI
tRP
RESET
Figure 3. Normal Watchdog Startup Sequence
V CC
WDI
< t WDI
< t WDI
< t WDI
> t WDI
< t WDI
< tWDI
< t WDI
0V
t WDI
V CC
WDO
0V
Figure 4. Watchdog Timer Operation
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| MAX16069FTC+ | 功能描述:监控电路 Quad/Hex/Octal Volt uP Supervisor 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 |
| MAX16069FTC+T | 功能描述:监控电路 Quad/Hex/Octal Volt uP Supervisor 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 |
| MAX1606EUA | 功能描述:LCD 驱动器 28V Int Switch LCD Bias Supply RoHS:否 制造商:Maxim Integrated 数位数量:4.5 片段数量:30 最大时钟频率:19 KHz 工作电源电压:3 V to 3.6 V 最大工作温度:+ 85 C 最小工作温度:- 20 C 封装 / 箱体:PDIP-40 封装:Tube |
| MAX1606EUA.C71076 | 制造商:Maxim Integrated Products 功能描述: |
| MAX1606EUA+ | 功能描述:LCD 驱动器 28V Int Switch LCD Bias Supply RoHS:否 制造商:Maxim Integrated 数位数量:4.5 片段数量:30 最大时钟频率:19 KHz 工作电源电压:3 V to 3.6 V 最大工作温度:+ 85 C 最小工作温度:- 20 C 封装 / 箱体:PDIP-40 封装:Tube |
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