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參數(shù)資料
| 型號： | TPS3828-xx |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | PROCESSOR SUPERVISORY CIRCUITS |
| 中文描述： | 處理器監(jiān)控電路 |
| 文件頁數(shù)： | 1/14頁 |
| 文件大?。?/td> | 217K |
| 代理商： | TPS3828-XX |
SLVS165E – APRIL 1998 – REVISED DECEMBER 2002
1
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
features
Power-On Reset Generator With Fixed
Delay Time of 200 ms (TPS3823/4/5/8)
or 25 ms (TPS3820)
Manual Reset Input (TPS3820/3/5/8)
Reset Output Available in Active-Low
(TPS3820/3/4/5), Active-High (TPS3824) and
Open-Drain (TPS3828)
Supply Voltage Supervision Range
2.5 V, 3 V, 3.3 V, 5 V
Watchdog Timer (TPS3820/3/4/8)
Supply Current of 15
μ
A (Typ)
SOT23-5 Package
Temperature Range . . . –40
°
C to 85
°
C
applications
Applications Using DSPs, Microcontrollers,
or Microprocessors
Industrial Equipment
Programmable Controls
Automotive Systems
Portable/Battery-Powered Equipment
Intelligent Instruments
Wireless Communications Systems
Notebook/Desktop Computers
description
The TPS382x family of supervisors provides
circuit initialization and timing supervision,
primarily for DSP and processor-based systems.
During power-on, RESET is asserted when
supply voltage V
DD
becomes higher than 1.1 V.
Thereafter, the supply voltage supervisor moni-
tors 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
, 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.
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.
Copyright
2002, Texas Instruments Incorporated
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3
2
4
5
TPS3820, TPS3823, TPS3828 . . . DBV PACKAGE
(TOP VIEW)
1
RESET
GND
MR
VDD
WDI
3
2
4
5
TPS3825 . . . DBV PACKAGE
(TOP VIEW)
1
RESET
GND
RESET
VDD
MR
3
2
4
5
TPS3824 . . . DBV PACKAGE
(TOP VIEW)
1
RESET
GND
RESET
VDD
WDI
RESET
MR
WDI
100 nF
VDD
GND
TPS3823-33
VDD
RESET
I/O
GND
MSP430C325
3.3 V
typical application
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|---|---|
| TPS3825-30DBVR | PROCESSOR SUPERVISORY CIRCUITS |
| TPS3820- | PROCESSOR SUPERVISORY CIRCUITS |
| TPS3820-25DBVT | PROCESSOR SUPERVISORY CIRCUITS |
| TPS3820-30DBVT | PROCESSOR SUPERVISORY CIRCUITS |
| TPS3820-xx | PROCESSOR SUPERVISORY CIRCUITS |
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