參數(shù)資料
型號(hào)： tps3617
廠商： Texas Instruments, Inc.
英文描述： BATTERY-BACKUP SUPERVISOR FOR RAM RETENTION(TPS3617-50 為保持RAM提供電池監(jiān)控的監(jiān)控器)
中文描述： 電池備份的RAM保持（TPS3617監(jiān)管者50為保持內(nèi)存提供電池監(jiān)控的監(jiān)控器）
文件頁(yè)數(shù)： 6/15頁(yè)
文件大?。?/td> 279K
代理商： TPS3617
SLVS339B
–
DECEMBER 2000
–
REVISED DECEMBER 2002
6
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
detailed description (continued)
VIT
WDI
RESET
td
td
t(tout)
VOUT
td
Undefined
Figure 1. Watchdog Timing
backup-battery switchover
In case of a brownout or power failure, it may be necessary to preserve the contents of RAM. If a backup battery
is installed at V
BAT
, the device automatically switches the connected RAM to backup power when V
DD
fails. In
order to allow the backup battery (e.g., a 3.6-V lithium cell) to have a higher voltage than V
DD
, these supervisors
should not connect V
BAT
to V
OUT
when V
BAT
is greater than V
DD
. V
BAT
only connects to V
OUT
(through a 15-
switch) when V
DD
falls below V
IT
and
V
BAT
is greater than V
DD
. When V
DD
recovers, switchover is deferred
either until V
DD
crosses V
BAT
, or until V
DD
rises above the reset threshold V
IT
. V
OUT
connects to V
DD
through
a 1-
(max) PMOS switch when V
DD
crosses the reset threshold.
VDD > VBAT
1
VDD > VIT
1
VOUT
VDD
VDD
VDD
VBAT
1
0
0
1
0
0
相關(guān)PDF資料
PDF描述
TPS3619 BACKUP-BATTERY SUPERVISORS FOR RAM RETENTION(用于RAM數(shù)據(jù)保持的后備電源監(jiān)控器)
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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)
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TPS3617-50 制造商:未知廠家 制造商全稱(chēng):未知廠家 功能描述:Battery-Backup Supervisors for RAM Retention
TPS3617-50DGK 功能描述:監(jiān)控電路 Battery-Backup for RAM Retention 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
TPS3617-50DGK 制造商:Texas Instruments 功能描述:BATTERY-BACKUP SVS FOR RAM RETEN
TPS3617-50DGKG4 功能描述:監(jiān)控電路 Battery-Backup for RAM Retention 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
TPS3617-50DGKR 功能描述:監(jiān)控電路 Battery-Backup for RAM Retention 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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