參數(shù)資料
型號(hào)： TPS3813K33DBV
廠商： Texas Instruments, Inc.
英文描述： PROCESSOR SUPERVISORY CIRCUITS WITH WINDOW-WATCHDOG
中文描述： 處理器監(jiān)控電路與窗口看門(mén)狗
文件頁(yè)數(shù)： 1/12頁(yè)
文件大?。?/td> 191K
代理商： TPS3813K33DBV
TPS3813J25, TPS3813L30, TPS3813K33, TPS3813I50
PROCESSOR SUPERVISORY CIRCUITS WITH WINDOW-WATCHDOG
SLVS331A – DECEMBER 2000 – REVISED APRIL 2001
1
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
features
Window-Watchdog With Programmable
Delay and Window Ratio
6-Pin SOT-23 Package
Supply Current of 9
μ
A (Typ)
Power On Reset Generator With a Fixed
Delay Time of 25 ms
Precision Supply Voltage Monitor 2.5 V, 3 V,
3.3 V, 5 V
Open-Drain Reset Output
Temperature Range . . . –40
°
C to 85
°
C
typical applications
Applications Using DSPs, Microcontrollers,
or Microprocessors
Safety Critical Systems
Automotive Systems
Heating Systems
TPS3813
DBV PACKAGE
description
The TPS3813 family of supervisory circuits pro-
vides circuit initialization and timing supervision,
primarily for DSPs and processor-based systems.
During power on, RESET is asserted when supply
voltage (V
DD
) becomes higher than 1.1 V. There
after, the supervisory circuit monitors V
DD
and keeps RESET active as long as V
DD
remains below the threshold
voltage (V
IT
). An internal timer delays the return of the output to the inactive state (high) to ensure proper system
reset. The delay time, t
d
= 25 ms typical, starts after V
DD
has risen above the threshold voltage (V
IT
). When the
supply voltage drops below the threshold voltage (V
IT
), the output becomes active (low) again. No external
components are required. All the devices of this family have a fixed-sense threshold voltage (V
IT
)
set by an
internal voltage divider.
For safety critical applications the TPS3813 family incorporates a so-called window-watchdog with
programmable delay and window ratio. The upper limit of the watchdog time-out can be set by either connecting
WDT to GND, V
DD
, or using an external capacitor. The lower limit and thus the window ratio is set by connecting
WDR to GND or V
DD
. The supervised processor now needs to trigger the TPS3813 within this window not to
assert a RESET.
typical operating circuit
WDR
RESET
WDT
WDI
VDD
GND
CWP
VDD
R
RESET
I/O
GND
0.1
μ
F
VDD
TPS3813
uC
0.1
μ
F
Copyright
2001, Texas Instruments Incorporated
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
3
2
4
6
(TOP VIEW)
1
WDI
GND
WDT
RESET
VDD
WDR
5
ACTUAL SIZE
3,00 mm x 3,00 mm
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TPS3813K33DBVR 功能描述:監(jiān)控電路 w/Prog Watchdog Window RoHS:否 制造商:STMicroelectronics 監(jiān)測(cè)電壓數(shù): 監(jiān)測(cè)電壓: 欠電壓閾值: 過(guò)電壓閾值: 輸出類(lèi)型:Active Low, Open Drain 人工復(fù)位:Resettable 監(jiān)視器:No Watchdog 電池備用開(kāi)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
TPS3813K33DBVRG4 功能描述:監(jiān)控電路 w/Prog Watchdog Window RoHS:否 制造商:STMicroelectronics 監(jiān)測(cè)電壓數(shù): 監(jiān)測(cè)電壓: 欠電壓閾值: 過(guò)電壓閾值: 輸出類(lèi)型:Active Low, Open Drain 人工復(fù)位:Resettable 監(jiān)視器:No Watchdog 電池備用開(kāi)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
TPS3813K33DBVT 功能描述:監(jiān)控電路 w/Prog Watchdog Window RoHS:否 制造商:STMicroelectronics 監(jiān)測(cè)電壓數(shù): 監(jiān)測(cè)電壓: 欠電壓閾值: 過(guò)電壓閾值: 輸出類(lèi)型:Active Low, Open Drain 人工復(fù)位:Resettable 監(jiān)視器:No Watchdog 電池備用開(kāi)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
TPS3813K33DBVTG4 功能描述:監(jiān)控電路 w/Prog Watchdog Window RoHS:否 制造商:STMicroelectronics 監(jiān)測(cè)電壓數(shù): 監(jiān)測(cè)電壓: 欠電壓閾值: 過(guò)電壓閾值: 輸出類(lèi)型:Active Low, Open Drain 人工復(fù)位:Resettable 監(jiān)視器:No Watchdog 電池備用開(kāi)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
TPS3813K33MDBVREP 功能描述:監(jiān)控電路 Mil Enh Proc Sup Circuits RoHS:否 制造商:STMicroelectronics 監(jiān)測(cè)電壓數(shù): 監(jiān)測(cè)電壓: 欠電壓閾值: 過(guò)電壓閾值: 輸出類(lèi)型:Active Low, Open Drain 人工復(fù)位:Resettable 監(jiān)視器:No Watchdog 電池備用開(kāi)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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