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參數(shù)資料
| 型號： | SP708EN |
| 英文描述： | Low Power Microprocessor Supervisory Circuits |
| 中文描述： | 低功耗微處理器監(jiān)控電路 |
| 文件頁數(shù)： | 10/18頁 |
| 文件大小： | 197K |
| 代理商： | SP708EN |
SP705DS/09
SP705 Low Power Microprocessor Supervisory Circuits
Copyright 2000 Sipex Corporation
10
Typically, WDO will be connected to the
non-maskable interrupt input (NMI) of a
μ
P.
When V
CC
drops below the reset threshold,
WDO will go LOW whether or not the watch-
dog timer has timed out. Normally this would
trigger an NMI but RESET goes LOW simulta-
neously, and thus overrides the NMI.
If WDI is left unconnected, WDO can be used as
a low-line output. Since floating WDI disables
the internal timer, WDO goes LOW only when
V
CC
falls below the reset threshold, thus func-
tioning as a low-line output.
Figure 14. SP705/706/813L/813M Watchdog Timing Waveforms
Figure 15. SP705/706 Timing Diagrams with WDI Tri-stated. The SP707/708/813L/813M RESET Output is the Inverse
of the RESET Waveform Shown.
t
RS
RESET*
WDO
0V
+5V
WDI
RESET*
0V
+5V
0V
+5V
0V
+5V
t
WD
t
WD
t
WD
t
WP
* externally triggered LOW by MR,
RESET is for the SP813L/813M only
V
CC
RESET
0V
+5V
0V
+5V
0V
+5V
t
RS
t
RS
t
MR
0V
+5V
MR*
WDO
V
RT
V
RT
*externally driven LOW
t
MD
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PDF描述 |
|---|---|
| SP706 | Low Power Microprocessor Supervisory Circuits(低功耗，微處理器監(jiān)控電路) |
| SP813L | Low Power Microprocessor Supervisory Circuits |
| SP813LCN | Low Power Microprocessor Supervisory Circuits |
| SP813LCP | Low Power Microprocessor Supervisory Circuits |
| SP813LCU | Low Power Microprocessor Supervisory Circuits |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SP708EN/TR | 制造商:Exar Corporation 功能描述: |
| SP708EN-L | 功能描述:監(jiān)控電路 LOW PWR MICROPROCESSOR 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 |
| SP708EN-L/TR | 功能描述:監(jiān)控電路 LOW PWR MICROPROCESSOR 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 |
| SP708EP | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:Low Power Microprocessor Supervisory Circuits |
| SP708EP-L | 制造商:Rochester Electronics LLC 功能描述: 制造商:Exar Corporation 功能描述: |
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