LM63CIMA/NOPB National Semiconductor, LM63CIMA/NOPB Datasheet - Page 17

• 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

4D
4C
Address
Hex
HEX
HEX
4D
4C
FAN PWM FREQUENCY REGISTER
PWM VALUE REGISTER
reg 4A
5 = 1.)
Read/
(Write
only if
Write
Read
R/W
bit
Bit
7:5
4:0
7:6
5:0 000000
s
Value
10111
POR
000
00
Frequency
Name
Value
PWM
PWM
These bits are unused and always set to 0
The PWM Frequency = PWM_Clock / 2n, where PWM_Clock = 360 kHz or 1.4 kHz
(per the PWM Clock Select bit in Register 4A), and n = value of the register. Note:
n = 0 is mapped to n = 1. See the Application Note at the end of this datasheet.
These bits are unused and always set to 0
If PWM Program (register 4A, bit 5) = 0 this register is read only and reflects the
LM63’s current PWM value from the Lookup Table.
If PWM Program (register 4A, bit 5) = 1, this register is read/write and the desired
PWM value is written directly to this register, instead of from the Lookup Table, for
direct fan speed control.
This register will read 0 during the Spin-Up cycle.
See Application Notes section at the end of this datasheet for more information
regarding the PWM Value and Duty Cycle in %.
17
Description
www.national.com