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LM95234 Datasheet(PDF) 3 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor. Click here to check the latest version.
Part No. LM95234
Description  Quad Remote Diode and Local Temperature Sensor with SMBus Interface and TruTherm™ Technology
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Maker  NSC [National Semiconductor (TI)]
Homepage  http://www.national.com
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LM95234 Datasheet(HTML) 3 Page - National Semiconductor (TI)

   
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Pin Descriptions (Continued)
Label
Pin #
Function
Typical Connection
D4+
3
Diode Current Source
To fourth Diode Anode. Connected to remote
discrete diode-connected transistor junction or to the
diode-connected transistor junction on a remote IC
whose die temperature is being sensed. A capacitor
is not required between D4+ and D-. A 100 pF
capacitor between D4+ and D- can be added and
may improve perfomance in noisy systems. Float
this pin if this thermal diode is not used.
D3+
4
Diode Current Source
To third Diode Anode. Connected to remote discrete
diode-connected transistor junction or to the
diode-connected transistor junction on a remote IC
whose die temperature is being sensed. A capacitor
is not required between D3+ and D-. A 100 pF
capacitor between D3+ and D- can be added and
may improve perfomance in noisy systems. Float
this pin if this thermal diode is not used.
D−
5
Diode Return Current Sink
To all Diode Cathodes. Common D- pin for all four
remote diodes.
D2+
6
Diode Current Source
To second Diode Anode. Connected to remote
discrete diode-connected transistor junction or to the
diode-connected transistor junction on a remote IC
whose die temperature is being sensed. A capacitor
is not required between D2+ and D-. A 100 pF
capacitor between D2+ and D- can be added and
may improve perfomance in noisy systems. Float
this pin if this thermal diode is not used.
D1+
7
Diode Current Source
To first Diode Anode. Connected to remote discrete
diode-connected transistor junction or to the
diode-connected transistor junction on a remote IC
whose die temperature is being sensed. A capacitor
is not required between D1+ and D-. A 100 pF
capacitor between D1+ and D- can be added and
may improve perfomance in noisy systems. Float
this pin if this thermal diode is not used.
GND
8
Power Supply Ground
System low noise ground.
A0
9
Dgital Input
SMBus slave address select pin. Selects one of
three addresses. Can be tied to V
DD, GND, or to the
middle of a resistor divider connected between V
DD
and GND.
TCRIT1
10
Digital Output, Open-Drain
Critical temperature output 1. Requires pull-up
resistor. Active "LOW".
TCRIT2
11
Digital Output, Open-Drain
Critical temperature output 2. Requires pull-up
resistor. Active "LOW".
SMBDAT
12
SMBus Bi-Directional Data
Line, Open-Drain Output
From and to Controller; may require an external
pull-up resistor
SMBCLK
13
SMBus Clock Input
From Controller; may require an external pull-up
resistor
TCRIT3
14
Digital Output, Open-Drain
Critical temperature output 3. Requires pull-up
resistor. Active "LOW".
www.national.com
3


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