LM63CIMA/NOPB National Semiconductor, LM63CIMA/NOPB Datasheet - Page 2

• Manufacturer Part Number: LM63CIMA/NOPB
• Description: IC TEMP SENSR REMOTE DIODE 8SOIC
• Manufacturer: National Semiconductor
• Series: PowerWise®r

Specifications of LM63CIMA/NOPB

• Function: Fan Control, Temp Monitor
• Topology: ADC (Sigma Delta), Comparator, Fan Speed Control, Register Bank
• Sensor Type: External & Internal
• Sensing Temperature: 0°C ~ 85°C, External Sensor
• Output Type: SMBus™
• Output Alarm: Yes
• Output Fan: Yes
• Voltage - Supply: 3 V ~ 3.6 V
• Operating Temperature: 0°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (3.9mm Width)
• Ic Output Type: Digital
• Sensing Accuracy Range: ± 1°C
• Supply Current: 1.3mA
• Supply Voltage Range: 3V To 3.6V
• Resolution (bits): 11bit
• Sensor Case Style: SOIC
• No. Of Pins: 8
• Termination Type: SMD
• Rohs Compliant: Yes
• Filter Terminals: SMD
• Accuracy %: 1°C
• For Use With: LM63EVAL - BOARD EVALUATION LM63
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: *LM63CIMA; LM63CIMA

www.national.com
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