LM90CIMMX National Semiconductor, LM90CIMMX Datasheet - Page 15

• Manufacturer Part Number: LM90CIMMX
• Manufacturer: National Semiconductor

Specifications of LM90CIMMX

• Temperature Sensor Function: Temp Sensor
• Interface Type: Serial (2-Wire)
• Output Type: Digital
• Package Type: MSOP
• Operating Temperature (min): 0C
• Operating Temperature (max): 85C
• Operating Temperature Classification: Commercial
• Operating Supply Voltage (min): 3V
• Operating Supply Voltage (typ): 3.3V
• Operating Supply Voltage (max): 3.6V
• Lead Free Status / Rohs Status: Not Compliant

2.0 LM90 REGISTERS
D7: ALERT mask: When set to “1” ALERT interrupts are masked.
D6: RUN/STOP: When set to “1” SHUTDOWN is enabled.
D5: is not defined and defaults to “0”.
D4: Remote T_CRIT mask: When set to “1” a diode temperature reading that exceeds T_CRIT setpoint will not activate the
T_CRIT_A pin.
D3: is not defined and defaults to “0”.
D2: Local T_CRIT mask: When set to “1” a Local temperature reading that exceeds T_CRIT setpoint will not activate the
T_CRIT_A pin.
D1: is not defined and defaults to “0”.
D0: Fault Queue: when set to “1” three consecutive remote temperature measurements outside the HIGH, LOW, or T_CRIT
setpoints will trigger an “Outside Limit” condition resulting in setting of status bits and associated output pins..
2.5 CONVERSION RATE REGISTER
2.6 LOCAL and REMOTE HIGH SETPOINT REGISTERS (LHS, RHSHB, and RHSLB)
For LHS and RHSHB: HIGH setpoint temperature data. Power up default is LHIGH = RHIGH = 70˚C. 1LSB = 1˚C. Two’s
complement format.
For RHSLB: Remote HIGH Setpoint Low Byte temperature data. Power up default is 0˚C. 1LSB = 0.125˚C. Two’s complement
format.
2.7 LOCAL and REMOTE LOW SETPOINT REGISTERS (LLS, RLSHB, and RLSLB)
For LLS and RLSHB: HIGH setpoint temperature data. Power up default is LHIGH = RHIGH = 0˚C. 1LSB = 1˚C. Two’s
complement format.
For RLSLB: Remote HIGH Setpoint Low Byte temperature data. Power up default is 0˚C. 1LSB = 0.125˚C. Two’s complement
format.
2.8 REMOTE TEMPERATURE OFFSET REGISTERS (RTOHB and RTOLB)
(Read Address 04h /Write
Address 0Ah)
Value
00
01
02
03
04
05
(Read Address 05h, 07h /Write Address 0Bh, 0Dh):
(Read/Write Address 13h):
(Read Address 06h, 08h, /Write Address 0Ch, 0Eh):
(Read/Write Address 14h):
(Read/Write Address 11h):
Value
Value
Value
Value
Value
BIT
BIT
BIT
BIT
BIT
Conversion
62.5 mHz
125 mHz
250 mHz
500 mHz
Rate
1 Hz
2 Hz
SIGN
SIGN
SIGN
(Continued)
0.5
0.5
D7
D7
D7
D7
D7
0.25
0.25
D6
D6
D6
D6
D6
64
64
64
0.125
0.125
D5
D5
D5
D5
D5
32
32
32
15
D4
D4
D4
D4
D4
16
16
16
0
0
D3
D3
D3
D3
D3
8
0
8
0
8
D2
D2
D2
D2
D2
4
0
4
0
4
(Read Address 04h /Write
Address 0Ah)
10-255
Value
D1
D1
D1
D1
D1
06
07
08
09
2
0
2
0
2
D0
D0
D0
D0
D0
1
0
1
0
1
Conversion
Undefined
16 Hz
32 Hz
Rate
4 Hz
8 Hz
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