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參數(shù)資料
| 型號(hào)： | TPS3707 |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | Processor Supervisory Circuits With Power-Fail(帶電源故障監(jiān)視處理機(jī)監(jiān)控電路) |
| 中文描述： | 處理器監(jiān)控電路，帶有電源失效（帶電源故障監(jiān)視處理機(jī)監(jiān)控電路） |
| 文件頁(yè)數(shù)： | 2/13頁(yè) |
| 文件大小： | 233K |
| 代理商： | TPS3707 |
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TPS3705-30, TPS3705-33, TPS3705-50
TPS3707-25, TPS3707-30, TPS3707-33, TPS3707-50
PROCESSOR SUPERVISORY CIRCUITS WITH POWER-FAIL
SLVS184B – NOVEMBER 1998 – REVISED JANUARY 1999
2
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
description
The TPS3705, TPS3707 family of microprocessor supply-voltage supervisors 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
supply voltage supervisor 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 typ
= 200 ms, 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.
The TPS3705-xx and TPS3707-xx devices incorporate a manual reset input, MR. A low level at MR causes
RESET to become active.
The TPS370x-xx families integrate a power-fail comparator which can be used for low-battery detection,
power-fail warning, or for monitoring a power supply other than the main supply.
The TPS3705-xx devices have a watchdog timer that is periodically triggered by a positive or negative transition
at WDI. When the supervising system fails to retrigger the watchdog circuit within the time-out interval,
t
t(out)
= 1.6 s, WDO becomes active. This event also reinitializes the watchdog timer. Leaving WDI unconnected
disables the watchdog.
The TPS3707-xx devices do not have the Watchdog function, but include a high-level output RESET.
The product spectrum is designed for supply voltages of 2.5 V, 3 V, 3.3 V, and 5 V. The circuits are available in
either 8-pin MSOP or standard SOIC packages. The TPS3705, TPS3707 devices are characterized for
operation over a temperature range of –40
°
C to 85
°
C.
AVAILABLE OPTIONS
PACKAGED DEVICES
TA
THRESHOLD
VOLTAGE
SMALL OUTLINE
(D)
POWER–PAD
μ
-SMALL OUTLINE
(DGN)
MARKING DGN
PACKAGE
CHIP FORM
(Y)
2.63 V
TPS3705–30D
TPS3705–30DGN
TIAAT
TPS3705-30Y
2.93 V
TPS3705–33D
TPS3705–33DGN
TIAAU
TPS3705–33Y
4.55 V
TPS3705–50D
TPS3705–50DGN
TIAAV
TPS3705–50Y
–40
°
C to 85
°
C
2.25 V
TPS3707–25D
TPS3707–25DGN
TIAAW
TPS3707–25Y
2.63 V
TPS3707–30D
TPS3707–30DGN
TIAAX
TPS3707–30Y
2.93 V
4.55 V
TPS3707–33D
TPS3707–50D
TPS3707–33DGN
TPS3707–50DGN
TIAAY
TIAAZ
TPS3707–33Y
TPS3707–50Y
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| tps3800(中文) | ULTRA SMALL SUPPLY VOLTAGE(超低電源電壓監(jiān)控器) |
| TPS3823(中文) | Processor Supervisory Circuits(處理器監(jiān)控電路) |
| TPS3823 | Processor Supervisory Circuits(處理器監(jiān)控電路) |
| TPS3824 | Processor Supervisory Circuits(處理器監(jiān)控電路) |
| TPS3825 | Processor Supervisory Circuits(處理器監(jiān)控電路) |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TPS3707-25D | 功能描述:監(jiān)控電路 2.25V Monitor 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 |
| TPS3707-25DG4 | 功能描述:監(jiān)控電路 Processor Supery 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 |
| TPS3707-25DGN | 功能描述:監(jiān)控電路 Processor with Power-Fail 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 |
| TPS3707-25DGNG4 | 功能描述:監(jiān)控電路 Processor with Power-Fail 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 |
| TPS3707-25DGNR | 功能描述:監(jiān)控電路 2.25V Monitor 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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