1 Features
• Internal Comparator with Pin Programmable 2°C
or 10°C Hysteresis
• No External Components Required
• Open Drain or Push-Pull Digital Output; Supports
CMOS Logic Levels
• Internal Temperature Sensor
• Internal Voltage Reference and DAC for Trip-Point
Setting
• Currently Available in 5-Pin SOT-23 Plastic
Package
• Excellent Power Supply Noise Rejection
• Key Specifications:
– Power Supply Voltage: 2.7V to 5.5 V
– Power Supply Current:
• 40μA(max)
• 20μA(typ)
– Hysteresis Temperature: 2°C or 10°C(typ)

2 Applications
• Microprocessor Thermal Management
• Appliances
• Portable Battery Powered Systems
• Fan Control
• Industrial Process Control
• HVAC Systems
• Remote Temperature Sensing
• Electronic System Protection

3 Description
The LM26NV is a precision, single digital-output, lowpower
thermostat comprised of an internal reference,
DAC, temperature sensor and comparator. Utilizing
factory programming, it can be manufactured with
different trip points as well as different digital output
functionality. The trip point (TOS) can be preset at
the factory to any temperature in the range of −55°C
to +110°C in 1°C increments. The LM26NV has one
digital output (OS/ OS/US/ US) and one digital input
(HYST). The digital output stage can be preset as
either open-drain or push-pull. In addition, it can be
factory programmed to be active HIGH or LOW. The
digital output can be factory programmed to indicate
an over temperature shutdown event (OS or OS) or
an under temperature shutdown event (US or US).
When preset as an overtemperature shutdown ( OS),
it will go LOW to indicate that the die temperature is
over the internally preset TOS and go HIGH when the
temperature goes below (TOS–THYST). Similarly, when
preprogrammed as an undertemperature shutdown
(US) it will go HIGH to indicate that the temperature
is below TUS and go LOW when the temperature is
above (TUS+THYST). The typical hysteresis, THYST, can
be set to 2°C or 10°C and is controlled by the state of
the HYST pin.
Available parts are detailed in the ordering
information. For other part options, contact a Texas
Instruments Distributor or Sales Representative for
information on minimum order qualification. The
LM26NV is currently available in a 5-lead SOT-23
package.