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參數(shù)資料
| 型號： | MAX820_EPE |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | Microprocessor and Non-Volatile Memory Supervisory Circuits |
| 中文描述： | 微處理器和非揮發(fā)性內(nèi)存監(jiān)控電路 |
| 文件頁數(shù)： | 7/16頁 |
| 文件大?。?/td> | 250K |
| 代理商： | MAX820_EPE |
M
Mic roproc essor and Non-Volatile
Memory S upervisory Circ uits
_______________________________________________________________________________________
7
______________________________________________________________Pin Desc ription
PIN
NAME
FUNCTION
1
RESET
2
RESET
Reset is the inverse of
RESET
.
3
V
CC
Input Supply Voltage
4
RESET IN/
INT
5
LLIN/REF OUT
6
OVO
7
OVI
8
SWT
9
MR
10
LOW LINE
11
WDI
12
GND
Ground
13
CE
OUT
Active-Low Reset Output goes low whenever V
CC
falls below the reset threshold in internal thresh-
old programming mode, or RESET IN falls below 1.30V in external threshold programming mode.
RESET
remains low for 200ms typ after the threshold is exceeded on power-up.
Reset-Input/Internal-Mode Select. Connect this input to GND to select internal threshold mode.
Select external programming mode by pulling this input 600mV or higher through an external volt-
age divider.
Low-Line Input/Reference Output connects directly to the low-line comparator in external program-
ming mode (RESET IN/
INT
≥
600mV). Connects directly to the internal 1.30V reference in internal
threshold mode (RESET IN/
INT
≤
60mV).
Overvoltage Comparator Output goes low when OVI is greater than 1.30V. This is an uncommitted
comparator and has no effect on any other internal circuitry.
Inverting Input to the Overvoltage Comparator. When OVI is greater than 1.30V,
OVO
goes low.
Connect OVI to GND or V
CC
when not used.
Set Watchdog-Timeout Input. Connect this input to V
CC
to select the default 1.6sec watchdog
timeout period. Connect a capacitor between this input and GND to select another watchdog-
timeout period. Watchdog timeout period = k x (capacitor value in nF)mV, where k = 27 for
V
CC
= 5V and k = 16.2 for V
CC
= 3V. If the watchdog function is unused, connect SWT to V
CC
.
16
WDPO
15
WDO
14
CE
IN
Manual-Reset Input. This input can be tied to an external momentary pushbutton switch, or to a
logic gate output. Internally pulled up to V
CC
.
Low-Line Output.
LOW LINE
goes low 120mV above the reset threshold in internal threshold mode,
or when LLIN/REFOUT goes below 1.30V in external programming mode.
Watchdog Input. If WDI remains either high or low for longer than the watchdog timeout period,
WDPO
pulses low and
WDO
goes low.
WDO
remains low until the next transition at WDI. Connect to
GND or V
CC
if unused.
Chip-Enable Output.
CE
OUT goes low only when
CE
IN is low and reset is not asserted. If
CE
IN is
CE
OUT will stay low for 15μs or until
CE
IN goes high, whichever
occurs first.
Chip-Enable Input—the input to the chip-enable transmission gate. Connect to GND or V
CC
if not
used.
Watchdog Output.
WDO
goes low if WDI remains either high or low longer than the watchdog time-
out period.
WDO
returns high on the next transition at WDI.
Watchdog-Pulse Output. Upon the absence of a transition at WDI,
WDPO
will pulse low for a mini-
mum of 500μs.
WDPO
precedes
WDO
by typically 70ns.
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| MAX820_ESE | Microprocessor and Non-Volatile Memory Supervisory Circuits |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX820ESE | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:Microprocessor and Nonvolatile Memory Supervisory Circuits |
| MAX820LC/D | 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 |
| MAX820LCPE | 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 |
| MAX820LCPE+ | 功能描述:監(jiān)控電路 MPU & NV Memory 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 |
| MAX820LCSE | 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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