LM56CIMM National Semiconductor, LM56CIMM Datasheet

IC, THERMOSTAT, DUAL, 8MSOP

LM56CIMM

Manufacturer Part Number
LM56CIMM
Description
IC, THERMOSTAT, DUAL, 8MSOP
Manufacturer
National Semiconductor
Datasheet

Specifications of LM56CIMM

Brief Features
Digital Outputs Support TTL Logic Levels, Internal Temperature Sensor, 2 Internal Comparators
Supply Voltage Range
2.7V To 10V
Operating Temperature Range
-40°C To +125°C
Digital Ic Case
RoHS Compliant
Ic Function
Low Power Thermostat
Rohs Compliant
Yes

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© 2009 National Semiconductor Corporation
Dual Output Low Power Thermostat
General Description
The LM56 is a precision low power thermostat. Two stable
temperature trip points (V
ing 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–T
OUT2 goes LOW when the temperature exceeds T2 and goes
HIGH when the temperature goes below (T2–T
an internally set 5°C typical hysteresis.
The LM56 is available in an 8-lead Mini-SO8 surface mount
package and an 8-lead small outline package.
Applications
Simplified Block Diagram and Connection Diagram
NS Package
Number
Transport
Media
Package
Number
Marking
Microprocessor Thermal Management
Appliances
Portable Battery Powered 3.0V or 5V Systems
Fan Control
Industrial Process Control
HVAC Systems
Remote Temperature Sensing
Electronic System Protection
Order
LM56BIM LM56BIMX LM56CIM LM56CIMX LM56BIMM LM56BIMMX LM56CIMM LM56CIMMX
LM56BIM
SOP-8
M08A
Rail
T1
Tape & Reel
2500 Units
and V
LM56BIM
SOP-8
M08A
T2
) are generated by divid-
12893
LM56CIM
SOP-8
M08A
Rail
HYST
HYST
). Similarly,
). T
1289301
Tape & Reel Tape & Reel Tape & Reel Tape & Reel Tape & Reel
2500 Units
HYST
LM56CIM
SOP-8
M08A
is
LM56
Features
Key Specifications
■ 
■ 
■ 
■ 
■ 
+25°C
+25°C to +85°C
−40°C to +125°C
Digital outputs support TTL logic levels
Internal temperature sensor
2 internal comparators with hysteresis
Internal voltage reference
Available in 8-pin SO and Mini-SO8 plastic packages
Temperature Trip Point Accuracy:
1000 Units
Power Supply Voltage
Power Supply Current
V
Hysteresis Temperature
Internal Temperature Sensor Output Voltage:
MUA08A
MSOP-8
REF
T02B
(+6.20 mV/°C x T) + 395 mV
3500 Units
MUA08A
MSOP-8
T02B
±2°C (max)
±2°C (max)
±3°C (max)
LM56BIM
1000 Units
MUA08A
MSOP-8
T02C
1.250V ±1% (max)
August 22, 2009
±3°C (max)
±3°C (max)
±4°C (max)
LM56CIM
230 μA (max)
www.national.com
3500 Units
MUA08A
MSOP-8
2.7V–10V
T02C
1289302
5°C

Related parts for LM56CIMM

LM56CIMM Summary of contents

Page 1

... Industrial Process Control ■ HVAC Systems ■ Remote Temperature Sensing ■ Electronic System Protection Simplified Block Diagram and Connection Diagram Order LM56BIM LM56BIMX LM56CIM LM56CIMX LM56BIMM LM56BIMMX LM56CIMM LM56CIMMX Number NS Package M08A M08A Number SOP-8 SOP-8 2500 Units Transport Media Rail Tape & ...

Page 2

Typical Application V = 1.250V x (R1)/( R3 1.250V x (R1 + R2)/( R3) T2 where kΩ and V = [6.20 mV/° ...

Page 3

Absolute Maximum Ratings Input Voltage Input Current at any pin (Note 2) Package Input Current(Note 2) Package Dissipation 25°C A  (Note 4) ESD Susceptibility (Note 5) Human Body Model - Pin 3 Only: All other pins LM56 ...

Page 4

Symbol Parameter ΔV /ΔI Load Regulation Sourcing REF L Symbol Parameter V + Power Supply I Supply Current S Digital Outputs I Logical “1” Output Leakage OUT(“1”) Current V Logical “0” Output Voltage OUT(“0”) Note 1: Absolute Maximum Ratings indicate ...

Page 5

Typical Performance Characteristics Quiescent Current vs Temperature OUT1 and OUT2 Voltage Levels vs Load Current Temperature Sensor Output Voltage vs Temperature V Output Voltage vs Load Current REF 1289304 Trip Point Hysteresis vs Temperature 1289332 Temperature Sensor Output Accuracy vs ...

Page 6

Trip Point Accuracy vs Temperature OUT1 and OUT2 Leakage Current vs Temperature V Start-Up Response REF www.national.com Comparator Bias Current vs Temperature 1289310 V Output Line Regulation vs Temperature TEMP 1289312 V TEMP 1289313 6 1289311 1289331 Start-Up Response 1289314 ...

Page 7

Functional Description Pin Descriptions V + This is the positive supply voltage pin. This pin should be bypassed with a 0.1 μF capacitor to ground. GND This is the ground pin. V This is the 1.250V bandgap voltage reference output ...

Page 8

Application Hints 1.0 LM56 TRIP POINT ACCURACY SPECIFICATION For simplicity the following is an analysis of the trip point ac- curacy using the single output configuration show in 2 with a set point of 82° ±V − ...

Page 9

MOUNTING CONSIDERATIONS The majority of the temperature that the LM56 is measuring is the temperature of its leads. Therefore, when the LM56 is placed on a printed circuit board not sensing the tem- perature of the ambient ...

Page 10

V AND V CAPACITIVE LOADING REF TEMP The LM56 V and V outputs handle capacitive loading REF TEMP well. Without any special precautions, these outputs can drive any capacitive load as shown in Figure 4 5.0 NOISY ENVIRONMENTS Over ...

Page 11

I = 300 nA (the maximum specified error). B Similarly, bias current affect on V can be defined by: T2   where I = 300 nA (the maximum specified error). B FIGURE 6. Audio Power Amplifier Overtemperature Detector The ...

Page 12

FIGURE 7. Simple Thermostat 12 1289322 ...

Page 13

... Wide) Molded Small Outline Package, JEDEC Order Number LM56BIM, LM56BIMX, LM56CIM or LM56CIMX 8-Lead Molded Mini Small Outline Package (MSOP) Order Number LM56BIMM, LM56BIMMX, LM56CIMM, or LM56CIMMX NS Package Number M08A (JEDEC REGISTRATION NUMBER M0-187) NS Package Number MUA08A 13 www ...

Page 14

... For more National Semiconductor product information and proven design tools, visit the following Web sites at: Products Amplifiers www.national.com/amplifiers Audio www.national.com/audio Clock and Timing www.national.com/timing Data Converters www.national.com/adc Interface www.national.com/interface LVDS www.national.com/lvds Power Management www.national.com/power Switching Regulators www.national.com/switchers LDOs www.national.com/ldo LED Lighting www ...

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