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參數(shù)資料
| 型號： | CAT825YSDI-G |
| 英文描述： | System Supervisory Voltage Reset with Watchdog and Manual Reset |
| 中文描述： | 系統(tǒng)監(jiān)控電壓復(fù)位，帶有看門狗和手動復(fù)位 |
| 文件頁數(shù)： | 7/14頁 |
| 文件大?。?/td> | 210K |
| 代理商： | CAT825YSDI-G |
CAT823, CAT824, CAT825
Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
7
Doc. No. MD-3027, Rev. A
FUNCTIONAL DESCRIPTION
PROCESSOR RESET
The CAT823-825 detect supply voltage (V
CC
)
conditions that are below the specified voltage trip
value (V
RST
) and provide a reset output to maintain
correct system operation. On power-up, ˉˉˉˉˉˉ (and
RESET if available) are kept active for a minimum
delay t
RP
of 140ms after the supply voltage (V
CC
) rises
above V
RST
to allow the power supply and processor
to stabilize. When V
CC
drops below the voltage trip
value (V
RST
), the reset output signals ˉˉˉˉˉˉ (and
RESET) are pulled active. ˉˉˉˉˉˉ (and RESET if
available) is specifically designed to provide the reset
input signals for processors. This provides reliable
and consistent operation as power is turned on, off or
during brownout conditions by maintaining the
processor operation in known conditions.
MANUAL RESET
The CAT823 and CAT825 each have a Manual Reset
(ˉˉˉ) input to allow for alternative control of the reset
outputs. The ˉˉˉ input is designed for direct con-
nection to a pushbutton (see Figure 1). The ˉˉˉ input
is internally pulled up by 52k
resistor and must be
pulled low to cause the reset outputs to go active.
Internally, this input is debounced and timed such that
ˉˉˉˉˉˉ (and RESET) signals of at least 140ms
minimum will be generated. The min 140ms t
RP
delay
commences as the Manual Reset input is released
from the low level. (see Figure 2)
Figure 1. Pushbutton RESET
Figure 2. Timing Diagram – Pushbutton RESET
MR
V
IL
V
IH
V
OH
t
RP
t
PDLY
t
PB
V
OL
RESET
RESET
RESET
CAT825
V
CC
RESET
GND
MR
Supply
Voltage
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| CAT825YSDI-GT3 | 功能描述:監(jiān)控電路 SUP ACT LOW ACT HI MR 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 |
| CAT825YTDI-G | 制造商:CATALYST 制造商全稱:Catalyst Semiconductor 功能描述:System Supervisory Voltage Reset with Watchdog and Manual Reset |
| CAT825YTDI-GT3 | 功能描述:監(jiān)控電路 SUP ACT LOW ACT HI MR 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 |
| CAT825ZSDI-G | 制造商:CATALYST 制造商全稱:Catalyst Semiconductor 功能描述:System Supervisory Voltage Reset with Watchdog and Manual Reset |
| CAT825ZSDI-GT3 | 功能描述:監(jiān)控電路 SUP ACT LOW ACT HI MR 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 |
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