LM74CIMX-3 National Semiconductor, LM74CIMX-3 Datasheet - Page 6

• Manufacturer Part Number: LM74CIMX-3
• Description: IC TEMP SENSOR DGTL 8-SOIC
• Manufacturer: National Semiconductor

Specifications of LM74CIMX-3

• Function: Temp Monitoring System (Sensor)
• Topology: ADC (Sigma Delta), Register Bank
• Sensor Type: Internal
• Sensing Temperature: -55°C ~ 150°C
• Output Type: MICROWIRE™, SPI™
• Output Alarm: No
• Output Fan: No
• Voltage - Supply: 3 V ~ 5.5 V
• Operating Temperature: -55°C ~ 150°C
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (0.154", 3.90mm Width)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: LM74CIMX-3TR

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Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. DC and AC electrical specifications do not apply when operating
the device beyond its rated operating conditions.
Note 2: When the input voltage (V
maximum package input current rating limits the number of pins that can safely exceed the power supplies with an input current of 5 mA to four.
Note 3: Reflow temperature profiles are different for lead-free and non-lead-free packages.
Note 4: Human body model, 100 pF discharged through a 1.5 kΩ resistor. Machine model, 200 pF discharged directly into each pin.
Note 5: The life expectancy of the LM74 will be reduced when operating at elevated temperatures. LM74 θ
attached to a printed circuit board with 2 oz. foil is summarized in the table below:
Note 6: All SOP (LM74CIM) parts will function over the V
the V
temperature ranges of −10°C to +65°C, −55°C to +125°C and −55°C to +150°C. For the SOP (LM74CIM) parts, the temperature error specifications for temperature
ranges of −40°C to +85°C, −25°C to +110°C, and −40°C to +110°C include error induced by power supply variation of ±5% from the nominal value. For the
LM74CIM (SOP) parts, the temperature error will increase by ±0.3°C for a power supply voltage (V
For the LM74CIBP-3 and LM74CITP-3 (micro SMD) parts all accuracies are guaranteed over the supply range of 2.65V to 3.6V, except for the temperature ranges
of -55°C to 125°C and −55°C to +150°C where the accuracy applies for the nominal supply voltage of 3.3V. For the LM74CIBP-5 and LM74CITP-5 (micro SMD)
parts all accuracies are guranteed over the supply range of 4.75V to 5.25V, except for the temperature ranges of -55°C to 125°C and −55°C to +150°C where
the accuracy applies for the nominal supply voltage of 5.0V. For the LM74CIBP and LM74CITP over -55°C to 125°C and −55°C to +150°C, a power supply
variation of ±10% will degrade the accuracy by ±0.3°C.
Note 7: Typicals are at T
Note 8: Limits are guaranteed to National's AOQL (Average Outgoing Quality Level).
Note 9: This specification is provided only to indicate how often temperature data is updated. The LM74 can be read at any time without regard to conversion
state (and will yield last conversion result). A conversion in progress will not be interrupted. The output shift register will be updated at the completion of the read
and a new conversion restarted.
Note 10: For best accuracy, minimize output loading. Higher sink currents can affect sensor accuracy with internal heating. This can cause an error of 0.64°C at
full rated sink current and saturation voltage based on junction-to-ambient thermal resistance.
+
supply voltage range of 2.65V to 5.5V. The SOP (LM74CIM) parts are tested and specified for rated temperature error at their nominal supply voltage for
A
= 25°C and represent most likely parametric norm.
I
) at any pin exceeds the power supplies (V
Device Number
LM74CIBP
LM74CITP
LM74CIM
FIGURE 3. TRI-STATE Data Output Timing Diagram
FIGURE 4. Data Input Timing Diagram
+
supply voltage range of 3V to 5.5V. All micro SMD (LM74SIBP and LM75CITP) parts will function over
I
< GND or V
6
NS Package
BPD05MPB
TPD05QSA
Number
M08A
I
> +V
S
) the current at that pin should be limited to 5 mA. The 20 mA
+
) variation of ±10% from the nominal value.
JA
Resistance (θ
(thermal resistance, junction-to-ambient) when
160°C/W
250°C/W
250°C/W
Thermal
JA
)
10090906
10090905