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LM56  Product Folder

Dual Output Low Power Thermostat
Generic P/N 56
General
Description		 Features Datasheet Package
& Models		 Samples
& Pricing

Parametric Table Parametric Table
Temperature Min (deg C) -40 
Temperature Max (deg C) 125 
Accuracy (+/-) (deg C) 2, 3 
Supply Min (Volt) 2.70 
Supply Max (Volt) 10 
Quiescent Current (mA) .23 
Sensor Gain 6.2 mV/Deg C 
VtempOutput Impedance (Ohm) 1500 
Comparators () 2 
RemoteDiode ThermalSensors () - 
Reference Output (Volt) 1.25 
Preset Setpoints No 

Datasheet

TitleSize in KbytesDate
View Online
Download
Receive via Email
LM56 Dual Output Low Power Thermostat 383 Kbytes 26-Feb-01 View Online Download Receive via Email
LM56 Dual Output Low Power Thermostat (JAPANESE)
 646 Kbytes   View Online Download Receive via Email

If you have trouble printing or viewing PDF file(s), see Printing Problems.

Package Availability, Models, Samples & Pricing

Part NumberPackageStatusModelsSamples &
Electronic
Orders		Budgetary PricingStd
Pack
Size		Package
Marking
TypePinsMSL/Lead-Free AvailabilityLead
Time		QtySPICEIBISQty$US each
LM56BIMSOIC NARROW8StatusFull productionN/AN/A24 Hour Samples
Buy Now 		1K+$0.85rail
of
95		NSXYTT
LM56
BIM
10-12 weeks15000
LM56CIMSOIC NARROW8StatusFull productionN/AN/A24 Hour Samples
Buy Now 		1K+$0.64rail
of
95		NSXYTT
LM56
CIM
10-12 weeks5000
LM56BIMMMINI SOIC8StatusFull productionN/AN/A24 Hour Samples
Buy Now 		1K+$1.00reel
of
1000		ZXTT
T02B
10-12 weeks0
LM56CIMMMINI SOIC8StatusFull productionN/AN/A24 Hour Samples
Buy Now 		1K+$0.76reel
of
1000		ZXTT
T02C
10-12 weeks0
LM56C MDCUnpackaged DieFull productionN/AN/ASamples  tray
of
N/A		-
N/A0
LM56C MWCWaferFull productionN/AN/A   wafer jar
of
N/A		-
N/A0

General 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 Mini-SO8 surface mount package and an 8-lead small outline package.

Features

  • Digital outputs support TTL logic levels
  • Internal temperature sensor
  • 2 internal comparators with hysteresis
  • Internal voltage reference
  • Currently available in 8-pin SO plastic package
  • Future availability in the 8-pin Mini-SO8 package

Key Specification

Power Supply Voltage2.7V-10V
Power Supply Current230 µA (max)
VREF1.250V ±1% (max)
Hysteresis Temperature5°C
Internal Temperature Sensor Output Voltage(+6.20 mV/°C x T) +395 mV
  • Temperature Trip Point Accuracy:
 LM56BIMLM56CIM
+25°C±2°C (max)±3°C (max)
+25°C to +85°C±2°C (max)±3°C (max)
-40°C to +125°C±3°C (max)±4°C (max)

Applications

  • 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
[Information as of 15-Jan-2004]

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