lm84cimqax National Semiconductor Corporation, lm84cimqax Datasheet - Page 15

• Manufacturer Part Number: lm84cimqax
• Description: Diode Input Digital Temperature Sensor With Two-wire Interface
• Manufacturer: National Semiconductor Corporation

3.0 Application Hints
7. The ideal place to connect the LM84’s GND pin is as
Noise on the digital lines, overshoot greater than V
undershoot less than GND, may prevent successful SMBus
communication with the LM84. SMBus no acknowledge is
the most common symptom, causing unnecessary traffic on
the bus. Although, the SMBus maximum frequency of com-
4.0 Typical Applications
close as possible to the Processors GND associated
Using a Diode Connected 2N3904 as a Remote Temperture Sensing Element
(Continued)
FIGURE 6. Recommended Diode Trace Layout
CC
and
15
munication is rather low (400 kHz max) care still needs to be
taken to ensure proper termination within a system with
multiple parts on the bus and long printed circuit board
traces.
with the sense diode. For the Pentium II this would be
pin A14.
DS100961-15
www.national.com
DS100961-17