LM56 Dual Output Resistor-Programmable Temperature Switch | TI.com

LM56 (ACTIVE)

Dual Output Resistor-Programmable Temperature Switch

Dual Output Resistor-Programmable Temperature Switch - LM56
Datasheet
 

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

Parametrics

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Part number Order 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) Comparator channels (#) Features Rating Package Group Package size: mm2:W x L (PKG) Interface
LM56 Order now -40 to 125     3     6.2     -40 to 125     Resistor Programmable     Open Drain     2.7     10     230     2     Built-in Hysteresis
Hysteresis (5°C)
Temperature Sensor and Switch    
Catalog     SOIC | 8
VSSOP | 8    
8SOIC: 19 mm2: 3.91 x 4.9 (SOIC | 8)
8VSSOP: 15 mm2: 4.9 x 3 (VSSOP | 8)    
Analog Output
Switch    
LM26LV Order now -40 to 150     2.3     -5.1 to -12.8     Range (0 to 150)
50, 60, 65, 70
75, 80, 85, 90
95, 100, 105, 110
115, 120, 125, 130
135, 140, 145, 150    
Factory Programmed     Open Drain
Push Pull    
1.6     5.5     8     1     Built-in Hysteresis
Hysteresis (5°C)
Temperature Sensor and Switch
Trip Test    
Catalog     WSON | 6     See datasheet (WSON)     Analog Output
Switch    
LM57 Order now -50 to 150     1.5     -5.2 to -12.9     -40 to 150     Resistor Programmable     Open Drain
Push Pull    
2.4     5.5     24     1     Built-in Hysteresis
Hysteresis (5°C or 10°C)
Temperature Sensor and Switch
Trip Test    
Catalog     TSSOP | 8
WSON | 8    
8TSSOP: 19 mm2: 6.4 x 3 (TSSOP | 8)
See datasheet (WSON)    
Analog Output
Switch    
TMP300 Order now -40 to 125     2     10     -40 to 125     Resistor Programmable     Open Drain     1.8     18     110     1     Hysteresis (5°C or 10°C)
Pin-Selectable Hysteresis
Temperature Sensor and Switch    
Catalog     SC70 | 6
SOT-23 | 6    
6SC70: 4 mm2: 2.1 x 2 (SC70 | 6)
6SOT-23: 5 mm2: 1.6 x 2.9 (SOT-23 | 6)    
Analog Output
Switch    
TMP302 Order now -40 to 125     2       50, 55, 60, 65
70, 75, 80, 85
90, 95, 100, 105
110, 115, 120, 125    
Pin-Selectable     Open Drain     1.4     3.6     8     1     Hysteresis (5°C or 10°C)
Pin-Selectable Hysteresis    
Catalog     SOT-5X3 | 6     6SOT-5X3: 2 mm2: 1.2 x 1.6 (SOT-5X3 | 6)     Switch    
TMP303 Order now -40 to 125     1       0, 60
0, 55
-20, 60    
Factory Programmed     Push Pull     1.4     3.6     3.5     2     Hysteresis (1°C or 2°C or 5°C or 10°C)     Catalog