Datasheet
LM95234
www.ti.com
SNIS136D –AUGUST 2006–REVISED MARCH 2013
PIN DESCRIPTIONS
Label Pin # Function Typical Connection
NC 1 No Connect Not connected. May be left floating, connected to GND or V
DD
.
V
DD
2 Positive Supply Voltage Input DC Voltage from 3.0V to 3.6V. V
DD
should be bypassed with a
0.1 µF capacitor in parallel with 100 pF. The 100 pF capacitor
should be placed as close as possible to the power supply pin.
Noise should be kept below 200 mVp-p, a 10 µF capacitor may
be required to achieve this.
D4+ 3 Diode Current Source 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 performance in noisy systems. Float this pin if
this thermal diode is not used.
D3+ 4 Diode Current Source 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 performance in noisy systems. Float this pin if
this thermal diode is not used.
D− 5 Diode Return Current Sink All Diode Cathodes. Common D- pin for all four remote diodes.
D2+ 6 Diode Current Source 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 performance in noisy systems. Float this pin if
this thermal diode is not used.
D1+ 7 Diode Current Source 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 performance in noisy systems. Float this pin if
this thermal diode is not used.
GND 8 Power Supply Ground System low noise ground.
A0 9 Digital 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 Bidirectional Data Line, From and to Controller; may require an external pull-up resistor
Open-Drain Output
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".
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