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參數資料
| 型號： | TPS3838K |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | NANPOWER SUPERVISORY CIRCUITS(處理器監控電路) |
| 中文描述： | NANPOWER監控電路（處理器監控電路） |
| 文件頁數： | 1/11頁 |
| 文件大小： | 173K |
| 代理商： | TPS3838K |
TPS3836E18 / J25 / H30 / L30 / K33
TPS3837E18 / J25 / L30 / K33, TPS3838E18 / J25 / L30 / K33
NANOPOWER SUPERVISORY CIRCUITS
SLVS292A – JUNE 2000 – REVISED JANUARY 2002
1
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
Supply Current of 220 nA (Typ)
Precision Supply Voltage Supervision
Range: 1.8 V, 2.5 V, 3.0 V, 3.3 V
Power-On Reset Generator With Selectable
Delay Time of 10 ms or 200 ms
Push/Pull RESET Output (TPS3836),
RESET Output (TPS3837), or
Open-Drain RESET Output (TPS3838)
Manual Reset
5-Pin SOT-23 Package
Temperature Range –40
°
C to 85
°
C
Applications Include
– Applications Using Low-Power DSPs,
Microcontrollers, or Microprocessors
– Portable/Battery-Powered Equipment
– Intelligent Instruments
– Wireless Communication Systems
– Notebook Computers
– Automotive Systems
description
The TPS3836, TPS3837, TPS3838 families of
supervisory circuits provide circuit initialization
and timing supervision, primarily for DSP and
processor-based systems.
During power on, RESET is asserted when the
supply voltage V
DD
becomes higher than 1.1 V.
Thereafter, the supervisory circuit monitors V
DD
and keeps RESET output 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 starts after V
DD
has risen
above the threshold voltage V
IT
.
When CT is connected to GND a fixed delay time of typical 10 ms is asserted. When connected to V
DD
the delay
time is typically 200 ms.
When the supply voltage drops below the threshold voltage V
IT
, the output becomes active (low) again.
All the devices of this family have a fixed-sense threshold voltage V
IT
set by an internal voltage divider.
The TPS3836 has an active-low push-pull RESET output. The TPS3837 has active-high push-pull RESET, and
TPS3838 integrates an active-low open-drain RESET output.
VDD
GND
CT
MR
RESET
TPS3836K33
VCC
VSS
RST
Xin
MSP430
Xout
T
Quartz
32 kHz
Lithium
Battery
3.6 V
TYPICAL OPERATING CIRCUIT
Copyright
2002, 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
5
(TOP VIEW)
1
CT
GND
MR
VDD
RESET
TPS3836, TPS3838
DBV PACKAGE
3
2
4
5
(TOP VIEW)
1
CT
GND
MR
VDD
RESET
TPS3837
DBV PACKAGE
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相關代理商/技術參數 |
參數描述 |
|---|---|
| TPS3838K33DB4 | 制造商:Texas Instruments 功能描述: |
| TPS3838K33DBVR | 功能描述:監控電路 220nA w/ 10ms/200ms Select delay time RoHS:否 制造商:STMicroelectronics 監測電壓數: 監測電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復位:Resettable 監視器:No Watchdog 電池備用開關:No Backup 上電復位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
| TPS3838K33DBVRG4 | 功能描述:監控電路 220nA w/ 10ms/200ms Select delay time RoHS:否 制造商:STMicroelectronics 監測電壓數: 監測電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復位:Resettable 監視器:No Watchdog 電池備用開關:No Backup 上電復位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
| TPS3838K33DBVT | 功能描述:監控電路 220nA w/ 10ms/200ms Select delay time RoHS:否 制造商:STMicroelectronics 監測電壓數: 監測電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復位:Resettable 監視器:No Watchdog 電池備用開關:No Backup 上電復位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
| TPS3838K33DBVTG4 | 功能描述:監控電路 220nA w/ 10ms/200ms Select delay time RoHS:否 制造商:STMicroelectronics 監測電壓數: 監測電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復位:Resettable 監視器:No Watchdog 電池備用開關:No Backup 上電復位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
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