- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄385012 > TPS3610U18PWR (Texas Instruments, Inc.) BATTERY-BACKUP SUPERVISORS FOR RAM RETENTION PDF資料下載
參數(shù)資料
| 型號(hào)： | TPS3610U18PWR |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | BATTERY-BACKUP SUPERVISORS FOR RAM RETENTION |
| 中文描述： | 電池備份的RAM保持監(jiān)事 |
| 文件頁數(shù)： | 10/22頁 |
| 文件大?。?/td> | 453K |
| 代理商： | TPS3610U18PWR |
SLVS327B
–
DECEMBER 2000
–
REVISED DECEMBER 2002
10
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
detailed description (continued)
manual switchover (MSWITCH)
While operating in the normal mode from V
DD
, the device can be forced manually to operate in battery-backup
mode by connecting MSWITCH to V
DD
. Refer to Table 1 for different switchover modes.
Table 1. Switchover Modes
MSWITCH
GND
STATUS
VDD mode
VDD mode
Switch to battery-backup mode
VDD
GND
VDD
Batter back p mode
Battery-backup mode
Battery-backup mode
Battery-backup mode
If the manual switchover feature is not used, MSWITCH
must
be connected to ground.
watchdog
In a microprocessor- or DSP-based system, it is important not only to supervise the supply voltage, but also to
ensure correct program execution. The task of a watchdog is to ensure that the program is not stalled in an
indefinite loop. The microprocessor, microcontroller or DSP has to toggle the watchdog input within typically
0.8 s to avoid the occurence of a time-out. Either a low-to-high or a high-to-low transition resets the internal
watchdog timer. If the input is unconnected, the watchdog is disabled and is retriggered internally.
saving current while using the watchdog
The watchdog input is internally driven low during the first 7/8 of the watchdog time-out period, then the input
momentarily pulses high, resetting the watchdog counter. For minimum watchdog input current (minimum
overall power consumption), WDI should be left low for the majority of the watchdog time-out period, and pulsed
low-high-low once within 7/8 of the watchdog time-out period to reset the watchdog timer. If instead WDI is
externally driven high for the majority of the timeout period, a current of, e.g., 5 V/40 k
≈
125
μ
A, can flow into
WDI.
VIT
WDI
RESET
td
td
t(tout)
VOUT
td
Undefined
Figure 5. Watchdog Timing
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| TPS3617 | BATTERY-BACKUP SUPERVISOR FOR RAM RETENTION |
| TPS3618 | BATTERY-BACKUP SUPERVISOR FOR RAM RETENTION |
| TPS3618-50DGKR | BATTERY-BACKUP SUPERVISOR FOR RAM RETENTION |
| TPS3801J25DCK | ULTRA-SMALL SUPPLY VOLTAGE SUPERVISORS |
| TPS3801 | Ultra-Small Supply Voltage Supervisors(超小電源電壓監(jiān)控器) |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TPS3610U18PWRG4 | 功能描述:監(jiān)控電路 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 |
| TPS3610U25PWR | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Analog IC |
| TPS3610U30PWR | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Analog IC |
| TPS3610U33PWR | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Analog IC |
| TPS3610U50 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:BATTERY-BACKUP SUPERVISORS FOR RAM RETENTION |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。