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MAX814_ESA

更新时间： 2024-12-02 01:05:19
品牌 Logo 应用领域
美信 - MAXIM /
页数 文件大小 规格书
16页 533K
描述
±1% Accuracy, Low-Power, 3V and 5V uP Supervisory Circuits

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MAX814_ESA 数据手册

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19-0412; Rev 1; 12/05  
1ꢀ Accuracꢁ, Low-Power, +3V and +5V  
µP Supervisorꢁ Circuits  
_______________General Description  
____________________________Features  
The MAX814/MAX815/MAX816 are high-accuracy  
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  
♦ Active-Low RESET Output  
Active-High RESET Output (MAX814/MAX816)  
♦ 75µA Max Supply Current  
Reset thresholds are available for operation with a vari-  
ety of 3V and 5V supply voltages.  
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 pack-  
ages. See the Selector Table for a review of features.  
♦ Guaranteed RESET Valid to V  
♦ Manual Reset Input  
= 1V  
CC  
♦
2% Power-Fail Comparator  
♦ Independent Watchdog with 1.56sec Timeout  
(MAX815)  
_____________________Selector Table  
♦ Power-Supply Glitch Immunity  
♦ 8-Pin SO and DIP Packages  
FEATURE  
RESET Output  
RESET Output  
Manual Reset  
MAX814  
MAX815  
MAX816  
✔
✔
✔
✔
✔
✔
✔
✔
______________Ordering Information  
V
Reset Voltage  
K, L, N, T  
K, L, N, T Adjustable  
CC  
PART*  
TEMP RANGE  
PIN-PACKAGE  
✔
✔
✔
Power-Fail Monitor  
Low-Line Detector  
Watchdog Circuit  
MAX814_CPA  
0°C to +70°C  
8 PDIP  
✔
*The MAX814/MAX815 offer a choice of reset threshold voltages.  
From the Reset Trip Threshold table, select the suffix corre-  
sponding to the desired threshold and insert it into the blank to  
complete the part number.  
Devices are available in both leaded and lead-free packaging.  
Specify lead free by adding the + symbol at the end of the part  
number when ordering.  
✔
________________________Applications  
Medical Equipment  
Controllers  
Intelligent Instruments  
Critical µP Power Monitoring  
Portable/Battery-Powered Equipment  
Set-Top Boxes  
Ordering Information continued at end of data sheet.  
Reset Trip Thresholds table appears at end of data sheet.  
__________________________________________________________Pin Configurations  
TOP VIEW  
1
2
3
4
8
7
6
5
1
2
3
4
8
7
6
5
1
2
3
4
8
7
6
5
RESET  
RESET  
LOW LINE  
PFO  
WDO  
RESET  
WDI  
RESET  
RESET  
RESET IN  
PFO  
MR  
MR  
MR  
V
V
V
CC  
CC  
CC  
MAX814  
MAX815  
MAX816  
GND  
GND  
GND  
PFI  
PFI  
PFO  
PFI  
DIP/SO  
DIP/SO  
DIP/SO  
________________________________________________________________ Maxim Integrated Products  
1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at  
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.  
1234567...16

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