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参数资料
| 型号： | MAX6814XK+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 5/6页 |
| 文件大小： | 0K |
| 描述： | IC WATCHDOG TIMER CIRC SC70-5 |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 1 |
| 类型： | 监视器电路 |
| 监视电压数目： | 1 |
| 输出： | 推挽式，图腾柱 |
| 复位： | 低有效 |
| 复位超时： | 最小为 1.12 s |
| 电压 - 阀值： | 2.19V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 6-TSSOP（5 引线），SC-88A，SOT-353 |
| 供应商设备封装： | SC-70-5 |
| 包装： | 标准包装 |
| 其它名称： | MAX6814XK+TDKR |
5-Pin Watchdog Timer Circuit
Watchdog Software Considerations
One way to help the watchdog timer monitor software
execution more closely is to set and clear the watchdog
input at different points in the program, rather than
pulsing the watchdog input high-low-high or low-high-
low. This technique avoids a stuck loop, in which the
watchdog timer would continue to be cleared inside the
loop, keeping the watchdog from timing out.
Figure 4 shows an example of a flow diagram where
the I/O driving the watchdog input is set high at the
beginning of the program, set low at the beginning of
every subroutine or loop, then set high again when the
program returns to the beginning. If the program
should hang in any subroutine, the problem would
quickly be corrected, since the I/O is continually set low
and the watchdog timer is allowed to time out, causing
an interrupt to be issued. This scheme results in higher
time average WDI input current than does leaving WDI
low for the majority of the timeout period and periodi-
cally pulsing it low-high-low (see the Watchdog Input
Current section).
V CC
V UVLO
V UVLO
START
SET WDI
WDO
t PP
HIGH
PROGRAM
CODE
Figure 2. Power-Up Timing Diagram
SUBROUTINE OR
PROGRAM LOOP
SET WDI LOW
V CC
V UVLO
WDO
WDI
t PP
t WD
t PP
RETURN
Figure 4. Watchdog Flow Diagram
Figure 3. Watchdog Timing Relationship
____________________Chip Information
TRANSISTOR COUNT: 607
PROCESS: BiCMOS
_______________________________________________________________________________________
5
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| MAX6829TWUT+T | IC MPU SUPERVISOR SOT23-6 |
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX6815LEUS | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
| MAX6815LEUS-T | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
| MAX6815MEUS | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
| MAX6815MEUS-T | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
| MAX6815REUS | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
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