Dual Output Resistor-Programmable Temperature Switch - LM56

LM56 (ACTIVE)

Dual Output Resistor-Programmable Temperature Switch

Recommended alternative parts

  • LM57  - The device has SIMILAR FUNCTIONALITY but is not functionally equivalent to the compared device.   Resistor programmable dual trip point with analog ouput

Description

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 temperature exceeds T2 and goes HIGH when the temperature goes below (T2–THYST). THYST is an internally set 5°C typical hysteresis.

The LM56 is available in an 8-lead VSSOP surface mount package and an 8-lead SOIC.

Features

  • Digital Outputs Support TTL Logic Levels
  • Internal Temperature Sensor
  • 2 Internal Comparators with Hysteresis
  • Internal Voltage Reference
  • Available in 8-pin SOIC and VSSOP Packages

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Parametrics Compare all products in Thermostat/Temperature Switch

 
Operating Temperature Range (C)
Accuracy Over Temp Range (Max) (C)
Sensor Gain (mV/Deg C)
SetPoint Value (deg C)
SetPoint Type
Output Type
Supply Voltage (Min) (V)
Supply Voltage (Max) (V)
Supply Current (Typ) (uA)
# Comparators
Special Features
Rating
Package Group
Estimated Package Size (WxL) (mm2)
Approx. Price (US$)
Interface
LM56 LM26LV LM57 TMP300 TMP708 TMP709
-40 to 125     0 to 150     -50 to 150     -40 to 125     -40 to 125     -40 to 125    
3     2.3     1.5     2     3     3    
6.2     -5.1 to -12.8     -5.2 to -12.9     10        
-40 to 125     0 to 150     -40 to 150     -40 to 125     0 to 125     0 to 125    
Resistor Programmable     Factory Programmed     Resistor Programmable     Resistor Programmable     Resistor Programmable     Resistor Programmable    
Open Drain     Open Drain
Push Pull    
Open Drain
Push Pull    
Open Drain     Open Drain     Open Drain    
2.7     1.6     2.4     1.8     2.7     2.7    
10     5.5     5.5     18     5.5     5.5    
230     8     24     110     40     40    
2     1     1     1     1     1    
Built-in Hysteresis
Hysteresis (5°C)
Temperature Sensor and Switch    
Built-in Hysteresis
Hysteresis (5°C)
Temperature Sensor and Switch
Trip Test    
Built-in Hysteresis
Hysteresis (5°C or 10°C)
Temperature Sensor and Switch
Trip Test    
Hysteresis (5°C or 10°C)
Pin-Selectable Hysteresis
Temperature Sensor and Switch    
Hysteresis (10°C or 30°C)
Pin-Selectable Hysteresis    
Hysteresis (2°C or 10°C)
Pin-Selectable Hysteresis    
Catalog     Catalog     Catalog     Catalog     Catalog     Catalog    
SOIC
VSSOP    
WSON     TSSOP
WSON    
SC70
SOT-23    
SOT-23     SOT-23    
8VSSOP: 3 x 3: 15 mm2
8SOIC: 3.91 x 4.9: 29 mm2    
6WSON: 2.2 x 2.5: 5.5 mm2     8WSON: 2.5 x 2.5: 6.3 mm2
8TSSOP: 4.4 x 3: 19 mm2    
6SC70: 1.25 x 2: 6.5 mm2
6SOT-23: 1.6 x 2.9: 10 mm2    
5SOT-23: 1.6 x 2.9: 10 mm2     5SOT-23: 1.6 x 2.9: 10 mm2    
0.66 | 1ku     0.43 | 1ku     0.65 | 1ku     0.75 | 1ku     0.30 | 1ku     0.30 | 1ku    
Analog Output     Analog Output     Analog Output     Analog Output     Analog Output     Analog Output    

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