1 Features
1• No External Components Required
• Shutdown Mode to Minimize Power Consumption
• Up to Eight LM75s Can be Connected to a Single
Bus
• Power Up Defaults Permit Stand-alone Operation
as Thermostat
• UL Recognized Component (LM75B and LM75C)
• Key Specifications:
– Supply Voltage
– LM75B, LM75C: 3 V to 5.5 V
– Supply Current
– Operating: 280 μA (typical)
– Shutdown: 4 μA (typical)
– Temperature Accuracy
– −25°C to 100°C: ±2°C (maximum)
– −55°C to 125°C: ±3°C (maximum)

2 Applications
• General System Thermal Management
• Communications Infrastructure
• Electronic Test Equipment
• Environmental Monitoring

3 Description
The LM75B and LM75C are industry-standard digital
temperature sensors with an integrated Sigma-Delta analog-to-digital converter and I2C interface. The
LM75 provides 9-bit digital temperature readings with
an accuracy of ±2°C from -25°C to 100°C and ±3°C
over –55°C to 125°C.
Communication is accomplished over a 2-wire
interface which operates up to 400kHz. The LM75
has three address pins, allowing up to eight LM75
devices to operate on the same 2-wire bus. The
LM75 has a dedicated over-temperature output (O.S.)
with programmable limit and hystersis. This output
has programmable fault tolerance, which allows the
user to define the number of consecutive error
conditions that must occur before O.S. is activated.
The wide temperature and supply range and I2C
interface make the LM75 ideal for a number of
applications including base stations, electronic test
equipment, office electronics, personal computers,
and any other system where thermal management is
critical to performance. The LM75B and LM75C are available in an SOIC package or VSSOP package.