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參數(shù)資料
| 型號： | MAX6747KA29 |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | UP Reset Circuits with Capacitor-Adjustable Reset/Watchdog Timeout Delay |
| 中文描述： | 復(fù)位電路的電容可調(diào)的復(fù)位/看門狗超時周期 |
| 文件頁數(shù)： | 11/14頁 |
| 文件大小： | 187K |
| 代理商： | MAX6747KA29 |
Interfacing to Other Voltages for
Logic Compatibility
The open-drain
RESET
output can be used to interface
to a μP with other logic levels. As shown in
Figure
6, the
open-drain output can be connected to voltages from 0
to 6V.
Generally, the pullup resistor connected to the
RESET
connects to the supply voltage that is being monitored
at the IC
’
s V
CC
pin. However, some systems can use
the open-drain output to level-shift from the monitored
supply to reset circuitry powered by some other supply.
Keep in mind that as the supervisor
’
s V
CC
decreases
towards 1V, so does the IC
’
s ability to sink current at
RESET
. Also, with any pullup resistor,
RESET
is pulled
high as V
CC
decays toward zero. The voltage where
this occurs depends on the pullup resistor value and
the voltage to which it is connected.
Ensuring a Valid
RESET
Down to V
CC
= 0V
(Push-Pull
RESET
)
When V
CC
falls below 1V,
RESET
current sinking capabil-
ities decline drastically. The high-impedance CMOS-
logic inputs connected to
RESET
can drift to undeter-
mined voltages. This presents no problems in most
applications, since most μPs and other circuitry do not
operate with V
CC
below 1V.
In those applications where
RESET
must be valid down
to 0V, add a pulldown resistor between
RESET
and
GND for the MAX6746/MAX6748/MAX6750/MAX6752
push/pull outputs. The resistor sinks any stray leakage
currents, holding
RESET
low (
Figure
7). The value of the
pulldown resistor is not critical; 100k
is large enough
not to load
RESET
and small enough to pull
RESET
to
ground. The external pulldown can not be used with
the open-drain reset outputs.
M
μP Reset Circuits with Capacitor-Adjustable
Reset/Watchdog Timeout Delay
______________________________________________________________________________________
11
MAX6746
MAX6748
MAX6450
MAX6752
GND
RESET
V
CC
V
CC
100k
Figure 7. Ensuring RESET Valid to V
CC
= 0
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX6747KA29/GG8-T | 功能描述:監(jiān)控電路 Microprocessor Reset Circuits with Capacitor-Adjustable Reset/Watchdog Timeout delay 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 |
| MAX6747KA29+ | 制造商:Maxim Integrated Products 功能描述:RESET CIRCUITS WITH CAPACITOR-ADJUSTABLE 制造商:Maxim Integrated Products 功能描述:PROCESSOR SUPERVISOR 2.925V 4.2UA 8PIN SOT-23 - Rail/Tube 制造商:Maxim 功能描述:Maxim MAX6747KA29+ Processor Supervisors |
| MAX6747KA29+T | 功能描述:監(jiān)控電路 Single uPower Supervisor 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 |
| MAX6747KA29+T | 制造商:Maxim Integrated Products 功能描述:IC, MPU SUPERVISOR, 10 uA, 5.5V, SOT23-8 |
| MAX6747KA29-T | 功能描述:監(jiān)控電路 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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