LM73CIMK-0/NOPB National Semiconductor, LM73CIMK-0/NOPB Datasheet - Page 13

• Manufacturer Part Number: LM73CIMK-0/NOPB
• Description: DIGITAL TS W/SMBUS INTERFACE
• Manufacturer: National Semiconductor
• Series: PowerWise®r

Specifications of LM73CIMK-0/NOPB

• Function: Temp Monitoring System (Sensor)
• Topology: ADC (Sigma Delta), Comparator, Register Bank
• Sensor Type: Internal
• Sensing Temperature: -40°C ~ 150°C
• Output Type: I²C™/SMBus™
• Output Alarm: No
• Output Fan: No
• Voltage - Supply: 2.7 V ~ 5.5 V
• Operating Temperature: -40°C ~ 150°C
• Mounting Type: Surface Mount
• Package / Case: TSOT-23-6, TSOT-6
• For Use With: LM73EVAL - BOARD EVALUATION FOR LM73
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: LM73CIMK-0; LM73CIMK-0TR

2.2 TEMPERATURE DATA REGISTER
Pointer Address 00h (Read Only)
Reset State: 7FFCh (+255.96875°C)
One-Shot State: 8000h (-256°C)
2.3 CONFIGURATION REGISTER
Pointer Address 01h (R/W)
Reset State: 40h
Bits
15:2
1:0
Bits
7
6
5
4
3
2
1:0
SIGN
D15
1°C
PD
D7
D7
Name
Full Power Down
reserved
ALERT Enable
ALERT Polarity
ALERT Reset
One Shot
Reserved
Name
Temperature Data
Not Used
reserved
128°C
0.5°C
D14
D6
D6
Description
Writing a "1" to this bit and holding it high for at least the specified maximum conversion time, at the
existing temperature resolution setting, puts the LM73 in shutdown mode for power conservation.
Writing a "0" to this bit restores the LM73 to normal mode. Waiting one specified maximum conversion
time for the existing resolution setting assures accurate data in the temperature register.
User must write only a 1 to this bit
A 0 in this location enables the ALERT output. A 1 disables it. This bit also controls the ALERT Status
bit (the Control/Status Register, Bit 3) since that bit reflects the state of the Alert pin.
When set to 1, the ALERT pin and ALERT Status bit are active-high. When 0, it is active-low.
Writing a 1 to this bit resets the ALERT pin and the ALERT Status bit. It will always be 0 when read.
When in shutdown mode (Bit 7 is 1), initiates a single temperature conversion and update of the
temperature register with new temperature data. Has no effect when in continuous conversion mode
(i.e., when Bit 7 is 0). Always returns a 0 when read.
User must write only a 0 to these bits.
Description
Represents the temperature that was measured by the most recent temperature conversion. On
Power-up, this data is invalid until the Data Available (DAV) bit in the Control/Status register is
high (after the completion of the first temperature conversion). The resolution is user-
progammable from 11-bit resolution (0.25°C/LSB) through 14-bit resolution (0.03125°C/LSB).
The desired resolution is programmed with bits 5 and 6 of the Control/Status register.
Return zeros upon read.
ALRT EN
0.25°C
64°C
D13
D5
D5
ALRT POL
0.125°C
32°C
D12
D4
D4
13
ALRT RST
0.0625°C
16°C
D11
D3
D3
ONE SHOT
0.03125°C
D10
8°C
D2
D2
reserved
4°C
D9
D1
D1
reserved
reserved
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2°C
D8
D0
D0