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LM56_06 PDF预览

LM56_06

更新时间: 2024-11-22 04:20:07
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美国国家半导体 - NSC /
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13页 791K
描述
Dual Output Low Power Thermostat

LM56_06 数据手册

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January 2006  
LM56  
Dual Output Low Power Thermostat  
General Description  
Features  
n Digital outputs support TTL logic levels  
n Internal temperature sensor  
n 2 internal comparators with hysteresis  
n Internal voltage reference  
The LM56 is a precision low power thermostat. Two stable  
temperature trip points (VT1 and VT2) are generated by  
dividing down the LM56 1.250V bandgap voltage reference  
using 3 external resistors. The LM56 has two digital outputs.  
OUT1 goes LOW when the temperature exceeds T1 and  
goes HIGH when the the temperature goes below  
(T1–THYST). Similarly, OUT2 goes LOW when the tempera-  
ture exceeds T2 and goes HIGH when the temperature goes  
below (T2–THYST). THYST is an internally set 5˚C typical  
hysteresis.  
n Available in 8-pin SO and Mini-SO8 plastic packages  
Key Specifications  
j
j
j
j
j
Power Supply Voltage  
Power Supply Current  
VREF  
2.7V–10V  
230 µA (max)  
1.250V 1% (max)  
5˚C  
The LM56 is available in an 8-lead Mini-SO8 surface mount  
package and an 8-lead small outline package.  
Hysteresis Temperature  
Applications  
Internal Temperature Sensor Output Voltage:  
(+6.20 mV/˚C x T) + 395 mV  
n Microprocessor Thermal Management  
n Appliances  
n Temperature Trip Point Accuracy:  
n Portable Battery Powered 3.0V or 5V Systems  
n Fan Control  
n Industrial Process Control  
n HVAC Systems  
n Remote Temperature Sensing  
n Electronic System Protection  
LM56BIM  
LM56CIM  
3˚C (max)  
3˚C (max)  
4˚C (max)  
+25˚C  
2˚C (max)  
2˚C (max)  
3˚C (max)  
+25˚C to +85˚C  
−40˚C to +125˚C  
Simplified Block Diagram and Connection Diagram  
01289302  
01289301  
Order  
Number  
LM56BIM LM56BIMX LM56CIM LM56CIMX LM56BIMM LM56BIMMX LM56CIMM LM56CIMMX  
NS Package  
Number  
M08A  
M08A  
SOP-8  
M08A  
M08A  
MUA08A  
MSOP-8  
MUA08A  
MSOP-8  
MUA08A  
MSOP-8  
MUA08A  
MSOP-8  
SOP-8  
SOP-8  
SOP-8  
2500 Units  
Tape &  
Reel  
2500 Units 1000 Units  
3500 Units  
1000 Units  
3500 Units  
Transport  
Media  
Rail  
Rail  
Tape &  
Reel  
Tape & Reel Tape & Reel Tape & Reel Tape & Reel  
Package  
Marking  
LM56BIM LM56BIM LM56CIM LM56CIM  
T02B  
T02B  
T02C  
T02C  
© 2006 National Semiconductor Corporation  
DS012893  
www.national.com  

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