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MAX814ESA

更新时间： 2024-11-30 22:55:11
品牌 Logo 应用领域
美信 - MAXIM 监控
页数 文件大小 规格书
16页 112K
描述
【1% Accuracy, Low-Power, +3V and +5V レP Supervisory Circuits

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MAX814ESA 数据手册

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19-0412; Rev 0; 6/95  
±1 % Ac c u ra c y, Lo w -P o w e r, +3 V a n d +5 V  
µP S u p e rvis o ry Circ u it s  
45/MAX816  
_______________Ge n e ra l De s c rip t io n  
____________________________Fe a t u re s  
The MAX814/MAX815/MAX816 a re hig h-a c c ura c y  
microprocessor (µP) supervisory circuits that provide  
power-on reset, watchdog, and power-fail functions.  
They eliminate manual trimming and improve reliability  
in critical applications needing high-accuracy reset  
thresholds. The RESET output is guaranteed to be in  
♦ ±1% Worst-Case Reset Threshold Accuracy  
♦ 4.8V, 4.7V, 4.55V, 3.03V, or Adjustable Reset  
Thresholds  
♦ ±1% Low-Line Threshold Accuracy (MAX814)  
60mV Above Reset Threshold  
the correct state for V  
down to 1V. The reset com-  
CC  
♦ 200ms Reset Time Delay  
parator is designed to ignore fast transients on V  
.
CC  
Reset thresholds are available for operation with a vari-  
ety of 3V and 5V supply voltages.  
♦ Active-Low RESET Output  
Active-High RESET Output (MAX814/MAX816)  
A 75µA maximum supply current makes the MAX814/  
MAX815/MAX816 ideal for use in portable equipment.  
All three devices are available in 8-pin DIP and SO  
packages. See the Selector Table below for a review of  
features.  
♦ 75µA Max Supply Current  
♦ Guaranteed RESET Valid to V  
♦ Manual Reset Input  
= 1V  
CC  
♦ ±2% Power-Fail Comparator  
_____________________S e le c t o r Ta b le  
♦ Independent Watchdog with 1.56sec Timeout  
(MAX815)  
FEATURE  
RESET Output  
RESET Output  
Manual Reset  
MAX814  
MAX815  
MAX816  
✔
✔
✔
✔
✔
✔
✔
♦ Power-Supply Glitch Immunity  
♦ 8-Pin SO and DIP Packages  
✔
V
Reset Voltage  
K, L, N, T  
K, L, N, T Adjustable  
CC  
_____________Re s e t Trip Th re s h o ld s  
✔
✔
✔
✔
Power-Fail Monitor  
Low-Line Detector  
Watchdog Circuit  
MAX814/MAX815  
RESET TRIP THRESHOLD  
SUFFIX  
✔
MIN (V)  
4.75  
MAX (V)  
4.85  
K
L
________________________Ap p lic a t io n s  
Medical Equipment  
4.65  
4.75  
N
T
4.50  
4.60  
Controllers  
Intelligent Instruments  
Critical µP Power Monitoring  
Portable/Battery-Powered Equipment  
Set-Top Boxes  
3.00  
3.06  
MAX816  
—
Adjustable  
Ordering Information appears at end of data sheet.  
__________________________________________________________P in Co n fig u ra t io n s  
TOP VIEW  
1
2
3
4
8
7
6
5
RESET  
RESET  
LOW LINE  
PFO  
1
2
3
4
8
7
6
5
WDO  
RESET  
WDI  
1
2
3
4
8
7
6
5
RESET  
RESET  
RESET IN  
PFO  
MR  
MR  
MR  
V
CC  
V
CC  
V
CC  
MAX814  
MAX815  
MAX816  
GND  
GND  
GND  
PFI  
PFI  
PFO  
PFI  
DIP/SO  
DIP/SO  
DIP/SO  
________________________________________________________________ Maxim Integrated Products  
1
Ca ll t o ll fre e 1 -8 0 0 -9 9 8 -8 8 0 0 fo r fre e s a m p le s o r lit e ra t u re .  
1234567...16

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