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參數(shù)資料
| 型號： | TPS3618 |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | BATTERY-BACKUP SUPERVISOR FOR RAM RETENTION |
| 中文描述： | 電池備份的RAM保持督導(dǎo)員 |
| 文件頁數(shù)： | 1/14頁 |
| 文件大?。?/td> | 315K |
| 代理商： | TPS3618 |
www.ti.com
FEATURES
Supply Current of 40 μA (Max)
Battery Supply Current of 100 nA (Max)
Precision 5-V Supply Voltage Monitor, Other
Voltage Options on Request
Backup-Battery Voltage Can Exceed V
DD
Watchdog Timer With 800-ms Time-Out
Power-On Reset Generator With Fixed 100-ms
Reset Delay Time
Voltage Monitor for Power-Fail or Low-Battery
Monitoring
Battery Freshness Seal (TPS3617 Only)
8-Pin MSOP Package
Temperature Range: -40
°
C to 85
°
C
DESCRIPTION
The TPS3617 and TPS3618 are battery-backup
supervisors that monitor 5 V supplies. They provide a
battery-backup function ideal for applications that
require data retention of CMOS RAM during fault
conditions. When the voltage at V
DD
drops below a
preset threshold (V
), the active low push-pull
RESET output asserts, and V
OUT
switches from V
DD
to V
BAT
. When V
DD
rises above the trip threshold,
V
switches
immediately
The RESET output remains low until the delay time
(t
d
) expires. During power on, RESET is asserted
when the supply voltage (V
DD
or V
BAT
) goes higher
than 1.1 V.
APPLICATIONS
Fax Machines
Set-Top Boxes
Advanced Voice Mail Systems
Portable Battery Powered Equipment
Computer Equipment
Advanced Modems
Automotive Systems
Portable Long-Time Monitoring Equipment
Point-of-Sale Equipment
V
DD
V
BAT
PFI
Backup
Battery
RESET
WDI
PFO
V
OUT
GND
R
x
R
y
External
Source
0.1
μ
F
Power
Supply
GND
RESET
I/O
I/O
V
CC
Switchover
Capacitor
0.1
μ
F
TPS3617
TPS3618
Microcontroller
or
Microprocessor
ACTUAL SIZE
3,05 mm x 4,98 mm
V
BAT
RESET
WDI
PFO
V
OUT
V
DD
GND
PFI
MSOP (DGK) Package
(TOP VIEW)
TPS3617
TPS3618
SLVS339C–DECEMBER 2000–REVISED NOVEMBER 2004
BATTERY-BACKUP SUPERVISOR FOR RAM RETENTION
from
V
to
V
.
The PFI and PFO pins are provided if additional
voltage monitoring is needed. If the voltage at PFI is
less than 1.15 V, the push-pull PFO pin will assert
low. When the voltage at PFI exceeds the threshold
voltage, PFO will go high.
These devices also feature a watchdog timer pin
(WDI) that monitors processor activity and asserts
RESET if the the processor is inactive longer than the
watchdog timeout period. If the watchdog timer is not
used, the WDI pin should be left floating.
The TPS3617 and TPS3618 are available in an 8-pin
MSOP package and are characterized for operation
over a temperature range of -40
°
C to 85
°
C.
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.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright 2000–2004, Texas Instruments Incorporated
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TPS3618-50DGKR | 功能描述:監(jiān)控電路 5-V Battery-Backup for RAM Retention RoHS:否 制造商:STMicroelectronics 監(jiān)測電壓數(shù): 監(jiān)測電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復(fù)位:Resettable 監(jiān)視器:No Watchdog 電池備用開關(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 |
| TPS3618-50DGKRG4 | 功能描述:監(jiān)控電路 5-V Batt Backup Supers for RAM Ret RoHS:否 制造商:STMicroelectronics 監(jiān)測電壓數(shù): 監(jiān)測電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復(fù)位:Resettable 監(jiān)視器:No Watchdog 電池備用開關(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 |
| TPS3618-50DGKT | 功能描述:監(jiān)控電路 5-V Battery-Backup for RAM Retention RoHS:否 制造商:STMicroelectronics 監(jiān)測電壓數(shù): 監(jiān)測電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復(fù)位:Resettable 監(jiān)視器:No Watchdog 電池備用開關(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 |
| TPS3618-50DGKTG4 | 功能描述:監(jiān)控電路 5-V Battery-Backup for RAM Retention RoHS:否 制造商:STMicroelectronics 監(jiān)測電壓數(shù): 監(jiān)測電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復(fù)位:Resettable 監(jiān)視器:No Watchdog 電池備用開關(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 |
| TPS3619-33 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:備份電池監(jiān)督員保留內(nèi)存 |
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