Datasheet
SMBus
Master
* Note, place close to LM95221 pins.
Q1
MMBT3904
LM95221
1
2
3
4
D1+
D1-
D2+
D2-
5
6
7
8
V
DD
SMBCLK
SMBDAT
GND
C1*
100 pF
C2
0.1 PF
SMBCLK
SMBDAT
C3*
2.2 nF
Pentium
®
4
PROCESSOR
C4*
2.2 nF
+3.3V
Standby
R1
1.3k
R2
1.3k
LM95221
www.ti.com
SNIS134B –MAY 2004–REVISED MARCH 2013
Typical Application
These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam
during storage or handling to prevent electrostatic damage to the MOS gates.
Absolute Maximum Ratings
(1)
Supply Voltage −0.3 V to 6.0 V
Voltage at SMBDAT, SMBCLK −0.5V to 6.0V
Voltage at Other Pins −0.3 V to (V
DD
+
0.3 V)
D− Input Current ±1 mA
Input Current at All Other Pins
(2)
±5 mA
Package Input Current
(2)
30 mA
SMBDAT Output Sink Current 10 mA
Storage Temperature −65°C to +150°C
Soldering Information, Lead Temperature VSSOP-8 Package
(3)
Vapor Phase (60 seconds) 215°C
Infrared (15 seconds) 220°C
ESD Susceptibility
(4)
Human Body Model 2000 V
Machine Model 200 V
(1) Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. DC and AC electrical specifications do not
apply when operating the device beyond its rated operating conditions.
(2) When the input voltage (V
I
) at any pin exceeds the power supplies (V
I
< GND or V
I
> V
DD
), the current at that pin should be limited to 5
mA. Parasitic components and or ESD protection circuitry are shown in Figure 3 below for the LM95221's pins. The nominal breakdown
voltage of D4 is 6.5 V. Care should be taken not to forward bias the parasitic diode, D1, present on pins: D1+, D2+, D1−, D2−. Doing so
by more than 50 mV may corrupt the temperature measurements.
(3) See the URL ”http://www.ti.com/packaging/“ for other recommendations and methods of soldering surface mount devices.
(4) Human body model, 100pF discharged through a 1.5kΩ resistor. Machine model, 200pF discharged directly into each pin.
Operating Ratings
(1)(2)
Operating Temperature Range 0°C to +115°C
Electrical Characteristics Temperature Range T
MIN
≤T
A
≤T
MAX
LM95221CIMM 0°C≤T
A
≤+85°C
Supply Voltage Range (V
DD
) +3.0V to +3.6V
(1) Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. DC and AC electrical specifications do not
apply when operating the device beyond its rated operating conditions.
(2) Thermal resistance junction-to-ambient when attached to a printed circuit board with 2 oz. foil:
— VSSOP-8 = 210°C/W
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