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參數(shù)資料
MAX16997/MAX16998
High-Voltage Watchdog Timers with
Adjustable Timeout Delay
8
_______________________________________________________________________________________
Timing Diagrams (continued)
VRESETIN
VHYST
PROPER WATCHDOG TRIGGER RESETS THE INTERNAL ENABLE COUNTER
tRESET = RESET TIMEOUT PERIOD
tOW = T OPEN WINDOW
tCW = T CLOSED WINDOW
tWP = tCW + tOW
tWDI = WDI TRIGGER PERIOD
3 CONSECUTIVE RESETS ENABLE GOES ACTIVE LOW
3 CONSECUTIVE WATCHDOG TRIGGER (WDI) ENABLE GOES ACTIVE HIGH
tWP
1
2
3
12
3
tWDI
tRESET
tOW
tCW
tWP
tWDI
VPON
WDI
ENABLE
RESET
Figure 3. MAX16998B/D Timing Diagram
VHYST
tOW
t = 0
tCW
tWP
tRESET
tCW
≤ tWDI ≤ tWP
tCW
≤ tWDI ≤ tWP
tWP
ENABLE DOES NOT GET ASSERTED IF THE VOLTAGE
AT RESETIN IS BELOW ITS THRESHOLD.
THE WATCHDOG TIMER CLEARS
WHENEVER RESET IS ASSERTED.
tRRDL
tWDI
tWDI tWDI tWDI tWDI
tWDI tWDI
VRESETIN
VPON
WDI
1.1V
VIN = ENABLE
RESET
tRESET
Figure 4. RESETIN, RESET, VIN, ENABLE, and WDI Voltage Monitoring
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX16998AAUA/V+ | 功能描述:監(jiān)控電路 Watchdog Timer w/Adj Timeout Delay RoHS:否 制造商:STMicroelectronics 監(jiān)測電壓數(shù): 監(jiān)測電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復(fù)位:Resettable 監(jiān)視器:No Watchdog 電池備用開關(guān):No Backup 上電復(fù)位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
| MAX16998AAUA/V+T | 功能描述:監(jiān)控電路 Watchdog Timer w/Adj Timeout Delay RoHS:否 制造商:STMicroelectronics 監(jiān)測電壓數(shù): 監(jiān)測電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復(fù)位:Resettable 監(jiān)視器:No Watchdog 電池備用開關(guān):No Backup 上電復(fù)位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
| MAX16998AAUA+ | 功能描述:監(jiān)控電路 Watchdog Timer w/Adj Timeout Delay RoHS:否 制造商:STMicroelectronics 監(jiān)測電壓數(shù): 監(jiān)測電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復(fù)位:Resettable 監(jiān)視器:No Watchdog 電池備用開關(guān):No Backup 上電復(fù)位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
| MAX16998AAUA+T | 功能描述:監(jiān)控電路 Watchdog Timer w/Adj Timeout Delay RoHS:否 制造商:STMicroelectronics 監(jiān)測電壓數(shù): 監(jiān)測電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復(fù)位:Resettable 監(jiān)視器:No Watchdog 電池備用開關(guān):No Backup 上電復(fù)位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
| MAX16998BAUA/V+ | 功能描述:監(jiān)控電路 Watchdog Timer w/Adj Timeout Delay RoHS:否 制造商:STMicroelectronics 監(jiān)測電壓數(shù): 監(jiān)測電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復(fù)位:Resettable 監(jiān)視器:No Watchdog 電池備用開關(guān):No Backup 上電復(fù)位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
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