The LM95235 is an 11-bit digital temperature sensor with a
2-wire System Management Bus (SMBus) interface and
TruTherm technology that can monitor the temperature of a
remote diode as well as its own temperature. The LM95235
can be used to very accurately monitor the temperature of
external devices such as microprocessors, graphics processors,
or a diode-connected MMBT3904 transistor. For automotive
applications the LM95235Q is available that is AECQ100
Grade3 compliant and is manufactured on an
Automotive Grade Flow. TruTherm BJT (transistor) beta compensation
technology allows the LM95235 to precisely monitor
thermal diodes found in 90 nm and smaller geometry
processes. LM95235 reports temperature in two different formats
for +127.875°C/-128°C range and 0°C/255°C range.
The LM95235 T_CRIT and OS outputs are asserted when
either unmasked channel exceeds its programmed limit and
can be used to shutdown the system, to turn on the system
fans, or as a microcontroller interrupt function. The current
status of the T_CRIT and OS pins can be read back from the
status registers via the SMBus interface. All limits have a
shared programmable hysteresis register.