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參數(shù)資料
| 型號： | MAX814N |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | 【1% Accuracy, Low-Power, +3V and +5V レP Supervisory Circuits |
| 中文描述： | 【1％精度，低功耗，3V和5VレP監(jiān)控電路 |
| 文件頁數(shù)： | 7/16頁 |
| 文件大?。?/td> | 111K |
| 代理商： | MAX814N |
M
±1% Ac c urac y, Low-Power, +3V and +5V
μP S upervisory Circ uits
_______________________________________________________________________________________
7
_______________Detailed Desc ription
The MAX814/MAX815/MAX816 are high-accuracy, low-
power microprocessor (μP) supervisory circuits. They
have μP-reset, watchdog-timer, and power-fail func-
tions. Typical applications illustrating their similarities
and differences are shown in Figures 1, 2, and 3.
Figures 4, 5, and 6 show the block diagrams of these
parts.
______________________________________________________________Pin Desc ription
PIN
MAX814
MAX815
MAX816
NAME
FUNCTION
1
1
1
MR
Manual-Reset Input. Triggers a reset when pulled below 1.10V. This active-
low input has an internal 150μA pull-up current to V
CC
, and can be driven
with CMOS logic or shorted to GND with a switch or transistor.
2
2
—
Positive Power-Supply Input. When V
CC
is below the reset threshold
voltage*, RESET is low, and remains low for a minimum of 140ms after
it rises above the threshold.
—
—
2
V
CC
Positive Power-Supply Input. On the MAX816, RESET is controlled by
RESET IN, not V
CC
.
3
3
3
GND
Ground
4
4
4
PFI
Power-Fail Input. The PFI threshold voltage is 1.70V on the MAX816 and on
MAX814/MAX815 parts with the T suffix. It is 2.50V on MAX814/MAX815
parts with K, L, and N suffixes. Connect PFI to GND or V
CC
when not used.
5
5
5
PFO
Power-Fail Output. When PFI is below its threshold, PFO is low;
otherwise it is high.
—
6
—
WDI
Watchdog CMOS Input. If WDI remains high or low for more than 1.56sec,
the watchdog timer times out, and WDO goes low. The timer is reset to
zero on each WDI transition.
6
—
—
LOW LINE
Low-Line Output. Normally high, LOW LINE goes low when V
CC
falls 60mV
above the reset threshold. It returns high as soon as V
CC
rises above the
low-line threshold.
—
—
6
RESET IN
Reset Comparator Input. Reference is 1.70V. When RESET IN is below
1.70V, RESET is low, and remains low for a minimum of 140ms after it rises
above the reference.
7
7
7
RESET
Reset Output. Normally high, active low. Controlled by MR and reset
comparator.
8
—
8
RESET
Reset Output. Active high. The inverse of RESET.
—
8
—
WDO
Watchdog Output. Normally high, WDO goes low whenever the V
CC
reset
threshold comparator input voltage is low or when the watchdog timer
times out. There is no appreciable delay going either direction when the
V
CC
threshold comparator toggles.
*Reset Threshold Voltage is determined by part number suffix: K = 4.80V, L = 4.70V, N = 4.55V, T = 3.03V.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MAX814T | 【1% Accuracy, Low-Power, +3V and +5V レP Supervisory Circuits |
| MAX814TC | 【1% Accuracy, Low-Power, +3V and +5V レP Supervisory Circuits |
| MAX814TE | 【1% Accuracy, Low-Power, +3V and +5V レP Supervisory Circuits |
| MAX815 | 【1% Accuracy, Low-Power, +3V and +5V レP Supervisory Circuits |
| MAX815C | 【1% Accuracy, Low-Power, +3V and +5V レP Supervisory Circuits |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX814NCPA | 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 |
| MAX814NCPA+ | 功能描述:監(jiān)控電路 3V & 5V 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 |
| MAX814NCSA | 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 |
| MAX814NCSA+ | 功能描述:監(jiān)控電路 3V & 5V 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 |
| MAX814NCSA+T | 功能描述:監(jiān)控電路 3V & 5V 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 |
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