LM63CIMA/NOPB National Semiconductor, LM63CIMA/NOPB Datasheet - Page 19

• 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

03 (09)
Address
03 (09)
Configuration Register
Hex
HEX
CONFIGURATION REGISTER
Read/
Write
R/W
Bits
4:3
7
6
5
2
1
0
Value
POR
00
0
0
0
0
0
0
PWM Disable
T_CRIT Limit
in STANDBY
ALERT/Tach
RDTS Fault
STANDBY
Override
ALERT
Queue
Name
Select
Mask
When this bit is a 0, ALERT interrupts are enabled.
When this bit is set to a 1, ALERT interrupts are masked, and the ALERT pin is
always in a high impedance (open) state.
When this bit is a 0, the LM63 is in operational mode, converting, comparing,
and updating the PWM output continuously.
When this bit is a 1, the LM63 enters a low power standby mode.
In STANDBY, continuous conversions are stopped, but a conversion/
comparison cycle may be initiated by writing any value to register 0x0F.
Operation of the PWM output in STANDBY depends on the setting of bit 5 in
this register.
When this bit is a 0, the LM63’s PWM output continues to output the current fan
control signal while in STANDBY.
When this bit is a 1, the PWM output is disabled (as defined by the PWM polarity
bit) while in STANDBY.
These bits are unused and always set to 0.
When this bit is a 0, the ALERT/Tach pin is an open drain ALERT output.
When this bit is a 1, the ALERT/Tach pin is a high impedance Tachometer input.
Note that if this bit is set, the function of the ALERT/Tach pin must be Tach input,
so an external ALERT condition will not occur.
The T_CRIT limit for the remote diode is nominally 85°C. This value can be
changed once after power-up by first setting this bit to a 1, then programming
a new T_CRIT value into the Remote Diode T_CRIT Limit (register 0x19). The
T_CRIT value can not be changed again except by cycling power to the LM63.
0: an ALERT will be generated if any Remote Diode conversion result is above
the Remote High Set Point or below the Remote Low Setpoint.
1: an ALERT will be generated only if three consecutive Remote Diode
conversions are above the Remote High Set Point or below the Remote Low
Setpoint.
19
Description
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