LM63CIMA/NOPB National Semiconductor, LM63CIMA/NOPB Datasheet - Page 21

• 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

Address
07 (0D)
08 (0E)
Remote Diode Temperature, Offset And Setpoint Registers
Hex
BF
01
10
11
12
13
14
19
21
Read/
Write
Read
Read
Only
Only
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Bits
7:0
7:5
4:0
7:5
7:5
4:0
7:0
7:5
4:0
7:0
7:5
4:0
7:0
7:0
7:3
2:1
0
(70°C)
(85°C)
(10°C)
Value
00000
(0°C)
0x0A
POR
0x46
0x55
N/A
N/A
00
00
00
00
00
00
00
00
00
00
0
OFFSET (MSB)
Reading (MSB)
Reading (MSB)
OFFSET (LSB)
Setpoint (MSB)
Setpoint (MSB)
Remote Diode
Remote Diode
Setpoint (LSB)
Setpoint (LSB)
Remote Diode
Remote Diode
Remote Diode
Remote HIGH
Remote HIGH
Remote LOW
Remote LOW
T_CRIT Limit
Temperature
Temperature
Temperature
Temperature
Temperature
Comparator
Hysteresis
Remote
Remote
T_CRIT
Name
Mode
Filter
This is the MSB of the 2’s complement value, representing the temperature of
the remote diode connected to the LM63. Bit 7 is the sign bit, bit 6 has a weight
of 0x40 (64°), and bit 0 has a weight of 1°C. This byte to be read first. The LM63C
and LM63D will report the actual thermal diode temperature.
This is the LSB of the 2’s complement value, representing the temperature of
the remote diode connected to the LM63. Bit 7 has a weight 0.5°C, bit 6 has a
weight of 0.25°C, and bit 5 has a weight of 0.125°C.
Always 00.
These registers contain the value added to or subtracted from the remote
diode’s reading to compensate for the different non-ideality factors of different
processors, diodes, etc. The 2’s complement value, in these registers is added
to the output of the LM63’s ADC to form the temperature reading contained in
registers 01 and 10.
Always 00.
High setpoint temperature for remote diode. Same format as Remote
Temperature Reading (registers 01 and 10).
Always 00.
Low setpoint temperature for remote diode. Same format as Remote
Temperature Reading (registers 01 and 10).
Always 00.
This 8-bit integer storing the T_CRIT limit is nominally 85°C. This value can be
changed once after power-up by setting T_CRIT Limit Override (bit 1) in the
Configuration register to a 1, then programming a new T_CRIT value into this
register. The T_CRIT Limit can not be changed again except by cycling power
to the LM63.
8-bit integer storing T_CRIT hysteresis. T_CRIT stays activated until the remote
diode temperature goes below [(T_CRIT Limit)—(T_CRIT Hysteresis)].
These bits are unused and should always set to 0.
00: Filter Disabled
01: Filter Level 1 (minimal filtering, same as 10)
10: Filter Level 1 (minimal filtering, same as 01)
11: Filter Level 2 (maximum filtering)
0: the ALERT/Tach pin functions normally.
1: the ALERTTach pin behaves as a comparator, asserting itself when an
ALERT condition exists, de-asserting itself when the ALERT condition goes
away.
21
Description
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