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參數(shù)資料
| 型號： | TS823CX5E |
| 廠商： | Taiwan Semiconductor Co., Ltd. |
| 英文描述： | Microprocessor Supervisory Circuit with Watchdog Timer & Manual Reset |
| 中文描述： | 微處理器監(jiān)控電路，帶有看門狗定時(shí)器 |
| 文件頁數(shù)： | 3/6頁 |
| 文件大小： | 115K |
| 代理商： | TS823CX5E |
TS823/824/825
3-6
2003/12 rev. A
Detail Description
Pin Function
**
RESET
RESET is active low.
**
GND
Ground
**
(RESET)
(RESET) is active high.
**
MR
This pin is active low. Pulling this pin low to forces a
reset. After a low to high transition reset remains
asserted for exactly one reset timeout period. This pin
is internally pulled high. If this function is unused then
float this pin or tie it to Vdd.
**
WDI
Watch Dog Input. Any transition on this pin will reset
the Watch Dog timer. If this pin remains high or low for
longer than the Watch Dog interval then a reset is
asserted. Float or tri-state this pin to disable the Watch
Dog feature.
**
Vdd
Positive power supply. A reset is asserted after this
voltage drops below a predetermined level. After Vdd
rises above that level reset remains asserted until the
end of the reset timeout period.
Applications Information
The TS823/824/825 are designed to interface with the
reset input of a microprocessor and to prevent CPU
execution errors due to power up, power down, and
other power supply errors. The TS823/824 also monitor
the CPU health by checking for signal transitions form
the CPU at the WDI input.
Reset Output
Active low reset outputs are denoted as RESET, Active
high reset output are denoted as (RESET),
A reset will be asserted if any of three things happen:
1) Vdd drops below the threshold (Vth)
2) The MR pin is pulled low.
3) The WDI pin does not detect a transition within the
Watch Dog interval (T
WD
)
The reset will remain asserted for the prescribed reset
interval after:
1) Vdd rises above the threshold (Vth)
2) MR goes high
3) The Watch Dog timer have timed out causing the
reset to assert.
Manual Reset Input
The TS823 and TS825 feature a manual reset feature
(MR). A logic low on the MR pin asserts a reset. The
reset remains asserted a long as the MR pin remains
low. After the MR pin transitions to a high state the reset
remains asserted for the prescribed reset interval (T
D2
).
The MR pin is internally pulled up to Vdd by a 100K
resistor. It is internally de-bounced to reject switching
transients.
The MR pin is ESD protected by diodes connected to
Vdd and Gnd. So the MR pin should never be driven
higher than Vdd or lower than Gnd.
Watchdog Input
The TS823 and TS824 are equipped with a watchdog
input (WDI). If the microprocessor does not produce a
valid logic edge at the watchdog input (WDI) within the
prescribed watchdog interval (T
WD
) then a reset asserts.
The reset remains asserted for the required reset
interval (T
D2
). Ata the end of the reset interval the reset
is deasserted and the watchdog interval timer starts
again from zero.
If the watchdog input is left unconnected or is connected
to a tri-stated buffer the watchdog function is disabled.
As soon as the WDI input is driven either low or high the
watchdog function resumes with the watchdog timer set
to zero.
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| TS824CX5E | Microprocessor Supervisory Circuit with Watchdog Timer & Manual Reset |
| TS823 | Microprocessor Supervisory Circuit with Watchdog Timer & Manual Reset |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TS823CX5E RF | 制造商:SKMI/Taiwan 功能描述:Processor Supervisor 2.93V 3V/3.3V/5V 5-Pin SOT-25 T/R |
| TS823CX5ERF | 制造商:TSC 制造商全稱:Taiwan Semiconductor Company, Ltd 功能描述:Microprocessor Supervisory Circuit with Watchdog Timer & Manual Reset |
| TS823CX5F | 功能描述:監(jiān)控電路 uP Supervisory Watch dog Manual Reset 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 |
| TS823CX5F RF | 制造商:SKMI/Taiwan 功能描述:Processor Supervisor 2.63V 3V/3.3V/5V 5-Pin SOT-25 T/R |
| TS823CX5FRF | 制造商:TSC 制造商全稱:Taiwan Semiconductor Company, Ltd 功能描述:Microprocessor Supervisory Circuit with Watchdog Timer & Manual Reset |
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