Part # LM83 datasheet

Part Manufacturer: National Semiconductor

National Semiconductor

Part Description:


Part Details:

LM83 November 1999 Triple-Diode LM83Triple-Diode Input and Local Digital Temperature Sensorwith Two-Wire Interface General Description Input n On-board local temperature sensing n SMBus and I2C compatible interface, supports The LM83 is a digital temperature sensor with a 2 wire serial SMBus 1.1 TIMEOUT interface that senses the voltage and thus the temperature ofthree remote diodes using a Delta-Sigma analog-to-digital n Two interrupt outputs: INT and T_CRIT_A and converter with a digital over-temperature detector. The LM83 n Register readback capability accurately senses its own temperature as well as the tem- n 7 bit plus sign temperature data format, 1 °C resolution perature of three external devices, such as Pentium II® Pro- n 2 address select pins allow connection of 9 LM83s on a Local cessors or diode connected 2N3904s. The temperature of single bus any ASIC can be detected using the LM83 as long as a dedi-cated diode (semiconductor junction) is available on the die. Key Specifications Using the SMBus interface a host can access the LM83 s Digital registers at any time. Activation of a T_CRIT_A output oc- j Supply Voltage 3.0V to 3.6V curs when any temperature is greater than a programmable j Supply Current 0.8mA (max) comparator limit, T_CRIT. Activation of an INT output occurs j Local Temp Accuracy (includes quantization error) when any temperature is greater than its corresponding pro-grammable comparator HIGH limit. 0°C to +85°C ±3.0°C (max) T The host can program as well as read back the state of the j Remote Diode Temp Accuracy (includes quantization emperature T_CRIT register and the four T_HIGH registers. Three state error) logic inputs allow two pins (ADD0, ADD1) to select up to 9 +25°C to +100°C ±3°C (max) SMBus address locations for the LM83. The sensor powers 0°C to +125°C ±4°C (max) up with default thresholds of 127°C for T_CRIT and allT_HIGHs. The LM83 is pin for pin and register compatiblewith the LM84 as well as the Maxim MAX1617 and the Ana- Applications log Devices ADM1021. n System Thermal Management n Computers Sensor


Please click the following link to download the datasheet:

LM83.pdf Datasheet