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MAX690T

更新时间: 2024-11-06 14:57:23
品牌 Logo 应用领域
亚德诺 - ADI 监控微处理器
页数 文件大小 规格书
13页 1557K
描述
3.0V/3.3V微处理器监控电路

MAX690T 数据手册

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MAX690T/S/R, MAX704T/S/R,  
MAX802T/S/R, MAX804‒MAX806T/S/R  
3.0V/3.3V Microprocessor  
Supervisory Circuits  
General Description  
Features  
RESET and RESET Outputs  
Manual Reset Input  
Precision Supply-Voltage Monitor  
200ms Reset Time Delay  
These microprocessor (µP) supervisory circuits reduce the  
complexity and number of components required for pow-  
er-supply monitoring and battery-control functions in µP  
systems. They significantly improve system reliability and  
accuracy compared to separate ICs or discrete components.  
Watchdog Timer (1.6sec timeout)  
Battery-Backup Power Switching—Battery Can  
These devices are designed for use in systems powered  
by 3.0V or 3.3V supplies. See the selector guide in the  
back of this data sheet for similar devices designed for  
5V systems. The suffixes denote different reset threshold  
voltages: 3.075V (T), 2.925V (S), and 2.625V (R) (see the  
Reset Threshold section in the Detailed Description). All  
these parts are available in 8-pin DIP and SO packages.  
Functions offered in this series are as follows:  
Exceed V  
in Normal Operation  
Supply Current  
CC  
40µA V  
CC  
1µA Battery Supply Current  
Voltage Monitor for Power-Fail or Low-Battery  
Warning  
Guaranteed RESET Assertion to V  
8-Pin DIP and SO Packages  
= 1V  
CC  
Applications  
Battery-Powered Computers and Controllers  
Embedded Controllers  
Intelligent Instruments  
Critical µP Power Monitoring  
Portable Equipment  
MAX690  
MAX704  
MAX802  
MAX804  
MAX805  
MAX806  
±4%  
±4%  
±2%  
±2%  
±4%  
±2%  
±75mV  
±75mV  
±2%  
Ordering Information  
±2%  
PART**  
TEMP RANGE  
0°C to +70°C  
PIN-PACKAGE  
8 Plastic DIP  
8 SO  
±75mV  
±2%  
MAX690_CPA  
MAX690_CSA  
MAX690_C/D  
MAX690_EPA  
MAX690_ESA  
MAX690_MJA  
0°C to +70°C  
0°C to +70°C  
Dice*  
-40°C to +85°C  
-40°C to +85°C  
-55°C to +125°C  
8 Plastic DIP  
8 SO  
Typical Operating Circuits  
REGULATED +3.3V OR +3.0V  
V
UNREGULATED  
DC  
CC  
µP  
8 CERDIP  
0.1µF  
V
CC  
RESET  
RESET  
(RESET)  
Ordering Information continued at end of data sheet.  
*Contact factory for dice specifications.  
R1  
R2  
NMI  
PFO  
WDI  
MAX690T/S/R  
MAX802T/S/R  
MAX804T/S/R  
MAX805T/S/R  
I/O LINE  
GND  
PFI  
**These parts offer a choice of reset threshold voltage. Select  
the letter corresponding to the desired nominal reset threshold  
voltage (T = 3.075V, S = 2.925V, R = 2.625V) and insert it into  
the blank to complete the part number.  
Devices in PDIP and SO packages are available in both leaded  
and lead(Pb)-free packaging. Specify lead free by adding the +  
symbol at the end of the part number when ordering. Lead free  
not available for CERDIP package.  
3.6V  
BUS  
LITHIUM  
BATTERY  
V
VBATT  
OUT  
GND  
V
CC  
CMOS RAM  
GND  
0.1µF  
0.1µF  
( ) ARE FOR MAX804T/S/R, MAX805T/S/R  
Typical Operating Circuits continued at at end of data  
sheet.  
Pin Configuration appears at end of data sheet.  
19-0243; Rev 3; 4/15  

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