LM63CIMA/NOPB National Semiconductor, LM63CIMA/NOPB Datasheet - Page 22

• 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
02
the time of the read.)
16
Address
ALERT Status And Mask Registers
HEX
HEX
0x02
Hex
16
ALERT STATUS REGISTER (8-bits) (All Alarms are latched until read, then cleared if alarm condition was removed at
ALERT MASK REGISTER (8-bits)
Read/
Write
Read
Only
R/W
Bits
7
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
Value
POR
0
0
0
0
0
0
0
0
1
0
1
0
0
1
0
0
High Alarm Mask
Remote Diode
T_CRIT Alarm
Alarm Mask
Alarm Mask
Alarm Mask
Fault Alarm
Tach Alarm
High Alarm
High Alarm
Low Alarm
Local High
Low Alarm
Remote
Remote
Remote
Remote
Remote
Remote
T_CRIT
Name
Local
Mask
Busy
Tach
When this bit is a 0, the ADC is not converting.
When this bit is set to a 1, the ADC is performing a conversion. This bit does
not affect ALERT status.
When this bit is a 0, the internal temperature of the LM63 is at or below the Local
High Setpoint.
When this bit is a 1, the internal temperature of the LM63 is above the Local
High Setpoint, and an ALERT is triggered.
This bit is unused and always read as 0.
When this bit is a 0, the temperature of the Remote Diode is at or below the
Remote High Setpoint.
When this bit is a 1, the temperature of the Remote Diode is above the Remote
High Setpoint, and an ALERT is triggered.
When this bit is a 0, the temperature of the Remote Diode is at or above the
Remote Low Setpoint.
When this bit is a 1, the temperature of the Remote Diode is below the Remote
Low Setpoint, and an ALERT is triggered.
When this bit is a 0, the Remote Diode appears to be correctly connected.
When this bit is a 1, the Remote Diode may be disconnected or shorted. This
Alarm does not trigger an ALERT.
When this bit is a 0, the temperature of the Remote Diode is at or below the
T_CRIT Limit.
When this bit is a 1, the temperature of the Remote Diode is above the T_CRIT
Limit, and an ALERT is triggered..
When this bit is a 0, the Tachometer count is lower than or equal to the
Tachometer Limit (the RPM of the fan is greater than or equal to the minimum
desired RPM).
When this bit is a 1, the Tachometer count is higher than the Tachometer Limit
(the RPM of the fan is less than the minimum desired RPM), and an ALERT is
triggered. 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 be generated. The user may
read the status register periodically to find out if and ALERT condition has
occurred.
This bit is unused and always read as 1.
When this bit is a 0, a Local High Alarm event will generate an ALERT.
When this bit is a 1, a Local High Alarm will not generate an ALERT
This bit is unused and always read as 1.
When this bit is a 0, Remote High Alarm event will generate an ALERT.
When this bit is a 1, a Remote High Alarm event will not generate an ALERT.
When this bit is a 0, a Remote Low Alarm event will generate an ALERT.
When this bit is a 1, a Remote Low Alarm event will not generate an ALERT.
This bit is unused and always read as 1.
When this bit is a 0, a Remote T_CRIT event will generate an ALERT.
When this bit is a 1, a Remote T_CRIT event will not generate an ALERT.
When this bit is a 0, a Tach Alarm event will generate an ALERT.
When this bit is a 1, a Tach Alarm event will not generate an ALERT.
22
Description