LM63CIMA National Semiconductor, LM63CIMA Datasheet - Page 2

• Manufacturer Part Number: LM63CIMA
• Manufacturer: National Semiconductor

Specifications of LM63CIMA

• Temperature Sensor Function: Temp Sensor
• Interface Type: Serial (2-Wire)
• Output Type: Digital
• Package Type: SOIC N
• Operating Temperature (min): 0C
• Operating Temperature (max): 85C
• Operating Temperature Classification: Commercial
• Operating Supply Voltage (min): 3V
• Operating Supply Voltage (typ): 3.3V
• Operating Supply Voltage (max): 3.6V
• Lead Free Status / Rohs Status: Not Compliant

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Pin
Pin Descriptions
1
2
3
4
5
6
7
8
Simplified Block Diagram
ALERT/TACH
SMBDAT
SMBCLK
Name
PWM
GND
V
D+
D−
DD
Power Supply Input
Open-Drain Output
Digital Output
Input/Output
Analog Input
Analog Input
Digital Input/
Digital Input
Open-Drain
Digital I/O
Ground
Connect to a low-noise +3.3 ± 0.3 VDC power supply, and bypass to GND with a 0.1
µF ceramic capacitor in parallel with a 100 pF ceramic capacitor. A bulk capacitance
of 10 µF needs to be in the vicinity of the LM63's V
Connect to the anode (positive side) of the remote diode. A 2.2 nF ceramic capacitor
must be connected between pins 2 and 3.
Connect to the cathode (negative side) of the remote diode. A 2.2 nF ceramic
capacitor must be connected between pins 2 and 3.
Open-Drain Digital Output. Connect to fan drive circuitry. The power-on default for
this pin is low (pin 4 pulled to ground).
This is the analog and digital ground return.
Depending on how the LM63 is programmed, this pin is either an open-drain
ALERT output or a tachometer input for measuring fan speed. The power-on default
for this pin is the ALERT function.
This is the bi-directional SMBus data line.
Digital Input. This is the SMBus clock input.
2
Function and Connection
DD
pin.
20057002