1FEATURES
23• Window Comparison Simplifies Design of
ACPI-Compatible Temperature Monitoring and
Control
• Serial Bus Interface
• Separate Open-Drain Outputs for Interrupt and
Critical Temperature Shutdown
• Shutdown Mode to Minimize Power
Consumption
• Up to Four LM92s can be Connected to a
Single Bus
• 12-Bit + Sign Output
• Operation up to 150°C

APPLICATIONS
• HVAC
• Medical Electronics
• Electronic Test Equipment
• System Thermal Management
• Personal Computers
• Office Electronics
• Automotive

KEY SPECIFICATIONS
• Supply Voltage 2.7V to 5.5V
• Supply Current operating 350 μA (typ) 625 μA
(max) shutdown 5 μA (typ)
• Temperature Accuracy
– 30°C, ±0.33°C (max)
– 10°C to 50°C, ±0.50°C (max)
– −10°C to 85°C, ±1.0°C (max)
– 125°C, ±1.25°C (max)
– −25°C to 150°C, ±1.5°C (max)
• Linearity ±0.5°C (max)
• Resolution 0.0625°C

DESCRIPTION
The LM92 is a digital temperature sensor and thermal
window comparator with an I2 C™ Serial Bus interface
and an accuracy of ±0.33°C. The window-comparator
architecture of the LM92 eases the design of
temperature control systems. The open-drain
Interrupt (INT) output becomes active whenever
temperature goes outside a programmable window,
while a separate Critical Temperature Alarm
(T_CRIT_A) output becomes active when the
temperature exceeds a programmable critical limit.
The INT output can operate in either a comparator or
event mode, while the T_CRIT_A output operates in
comparator mode only.
The host can program both the upper and lower limits
of the window as well as the critical temperature limit.
Programmable Hysteresis as well as a fault queue
are available to minimize false tripping. Two pins (A0,
A1) are available for address selection. The sensor
powers up with default thresholds of 2°C THYST, 10°C
TLOW, 64°C THIGH, and 80°C T_CRIT.
The LM92's 2.7V to 5.5V supply voltage range, Serial
Bus interface, 12-bit + sign output, and full-scale
range of over 128°C make it ideal for a wide range of
applications. These include thermal management and
protection applications in personal computers,
electronic test equipment, office electronics,
automotive, medical and HVAC applications.