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TPS3813K33 PDF预览

TPS3813K33

更新时间： 2024-11-07 04:48:51
品牌 Logo 应用领域
德州仪器 - TI 监控
页数 文件大小 规格书
16页 386K
描述
PROCESSOR SUPERVISORY CIRCUITS WITH WINDOW-WATCHDOG

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TPS3813K33 数据手册

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TPS3813J25, TPS3813L30  
TPS3813K33, TPS3813I50  
www.ti.com  
SLVS331B–DECEMBER 2000–REVISED JUNE 2005  
PROCESSOR SUPERVISORY CIRCUITS WITH WINDOW-WATCHDOG  
FEATURES  
TPS3813  
DBV PACKAGE  
(TOP VIEW)  
•
Window-Watchdog With Programmable Delay  
and Window Ratio  
•
•
•
6-Pin SOT-23 Package  
Supply Current of 9 µA (Typ)  
1
2
3
6
5
4
RESET  
WDR  
WDI  
GND  
Power On Reset Generator With a Fixed Delay  
Time of 25 ms  
V
DD  
WDT  
•
Precision Supply Voltage Monitor 2.5 V, 3 V,  
3.3 V, 5 V  
•
•
Open-Drain Reset Output  
ACTUAL SIZE  
3,00 mm x 3,00 mm  
Temperature Range –40°C to 85°C  
APPLICATIONS  
•
Applications Using DSPs, Microcontrollers, or  
Microprocessors  
•
•
•
Safety Critical Systems  
Automotive Systems  
Healing Systems  
DESCRIPTION  
The TPS3813 family of supervisory circuits provides circuit initialization and timing supervision, primarily for  
DSPs and processor-based systems.  
During power on, RESET is asserted when supply voltage (VDD) becomes higher than 1.1 V. Thereafter, the  
supervisory circuit monitors VDD and keeps RESET active as long as VDD remains below the threshold voltage  
(VIT). An internal timer delays the return of the output to the inactive state (high) to ensure proper system reset.  
The delay time, td = 25 ms typical, starts after VDD has risen above the threshold voltage (VIT). When the supply  
voltage drops below the threshold voltage (VIT), the output becomes active (low) again. No external components  
are required. All the devices of this family have a fixed-sense threshold voltage (VIT) set by an internal voltage  
divider.  
TYPICAL OPERATING CIRCUIT  
V
DD  
0.1 µF  
0.1 µF  
R
V
DD  
V
DD  
WDR RESET  
TPS3813  
RESET  
uC  
WDT  
WDI  
I/O  
GND  
GND  
C
WP  
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.  
PRODUCTION DATA information is current as of publication date.  
Copyright © 2000–2005, Texas Instruments Incorporated  
Products conform to specifications per the terms of the Texas  
Instruments standard warranty. Production processing does not  
necessarily include testing of all parameters.  
1234567...16

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