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LM74CIM-3
Texas Instruments
SENSOR DIGITAL -55C-150C 8SOIC
2245 Pcs New Original In Stock
Temperature Sensor Digital, Local -55°C ~ 150°C 12 b
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Minimum 1
5.0 / 5.0
- (410 Ratings)
LM74CIM-3
Product Overview
1283894
DiGi Electronics Part Number
LM74CIM-3-DGManufacturer
Texas Instruments
LM74CIM-3
Description
SENSOR DIGITAL -55C-150C 8SOICInventory
2245 Pcs New Original In Stock
Temperature Sensor Digital, Local -55°C ~ 150°C 12 b
Quantity
Minimum 1
Minimum 1
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LM74CIM-3 Technical Specifications
Category
Temperature Sensors, Analog and Digital Output
Packaging
Tube
Series
-
Product Status
Not For New Designs
Sensor Type
Digital, Local
Sensing Temperature - Local
-55°C ~ 150°C
Sensing Temperature - Remote
-
Output Type
SPI
Voltage - Supply
3V ~ 5.5V
Resolution
12 b
Features
Shutdown Mode
Accuracy - Highest (Lowest)
1.25°C (±5°C)
Test Condition
-10°C ~ 65°C (-55°C ~ 150°C)
Operating Temperature
-55°C ~ 150°C
Mounting Type
Surface Mount
Package / Case
8-SOIC (0.154", 3.90mm Width)
Base Product Number
LM74
Datasheet & Documents
HTML Datasheet
LM74CIM-3-DG
Environmental & Export Classification
RoHS Status
RoHS non-compliant
Moisture Sensitivity Level (MSL)
1 (Unlimited)
REACH Status
REACH Affected
ECCN
EAR99
HTSUS
8542.39.0001
Additional Information
Other Names
LM74CIM-3-DG
*LM74CIM-3
2156-LM74CIM-3-TI
LM74CIM3
NATNSCLM74CIM-3
296-35138-5
Standard Package
95
Alternative Parts
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MANUFACTURER
QUANTITY AVAILABLE
DiGi PART NUMBER
UNIT PRICE
SUBSTITUTE TYPE
Reviews
5.0/5.0-(Show up to 5 Ratings)
de desembre 02, 2025
Le soin apporté à la fabrication se voit dans chaque produit. Je suis très satisfait.
de desembre 02, 2025
Schnelle Lieferungen verbunden mit einem exzellenten Service – genau das, was man sich wünscht.
de desembre 02, 2025
The quality consistency across different batches from DiGi Electronics is very reassuring.
de desembre 02, 2025
Their commitment to consistency reassures me every time I shop.
de desembre 02, 2025
The build quality is consistently excellent, giving confidence in every project I undertake.
de desembre 02, 2025
Ordering from DiGi Electronics is always a trustworthy decision due to their fair prices and careful packaging.
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Frequently Asked Questions (FAQ)
Can I use the LM74CIM-3 in a new design, and what are the risks given its 'Not For New Designs' status from Texas Instruments?
The LM74CIM-3 is marked as 'Not For New Designs' by Texas Instruments, meaning it's in legacy status and may be discontinued in the future. While it is currently in stock and functional, using it in new designs poses sourcing and long-term reliability risks. For new projects, consider recommended pin-compatible drop-in replacements like the LM74CIM-3/NOPB, which offers the same performance but with RoHS compliance and better long-term availability. If you're already using the LM74CIM-3 in an existing design, plan for eventual obsolescence by qualifying alternatives early to avoid production disruptions.
How does the LM74CIM-3 compare to the Microchip TC77-5.0MOA for SPI temperature sensing in industrial applications?
The LM74CIM-3 and TC77-5.0MOA are functionally similar digital temperature sensors with 12-bit resolution and SPI interfaces, operating across -55°C to 150°C. However, the LM74CIM-3 has better accuracy in the extended range (±1.25°C from -10°C to 65°C vs. ±2°C for the TC77), making it preferable in precision industrial environments. The TC77 series offers RoHS compliance, whereas the LM74CIM-3 is RoHS non-compliant, which may impact compliance in regulated markets. Additionally, the TC77 has faster conversion times (typ. 200ms vs. 340ms for LM74CIM-3), so consider response time versus accuracy trade-offs when selecting between them.
What PCB layout considerations should I follow to maintain accuracy with the LM74CIM-3 in high-noise environments?
To maintain accuracy with the LM74CIM-3 in noisy environments, minimize trace lengths between the sensor and MCU, especially on the SPI lines. Use a ground plane under the 8-SOIC package to reduce thermal and electrical noise. Place a 0.1µF ceramic bypass capacitor as close as possible to the VDD and GND pins to suppress supply noise. Avoid routing high-speed or high-current traces near the LM74CIM-3, as these can couple noise into the sensor die and affect temperature readings. Since the LM74CIM-3 has shutdown mode, ensure control lines are stable during operation to prevent unintended power cycling that could corrupt readings.
Is the LM74CIM-3 susceptible to thermal lag when monitoring fast-changing ambient temperatures on a PCB?
Yes, the LM74CIM-3 can experience thermal lag due to its SOIC package's thermal mass, especially during rapid ambient temperature changes. Since it measures local die temperature, the thermal response depends on PCB copper density, airflow, and proximity to heat sources. To minimize lag, reduce copper pours directly connected to the sensor pins (especially GND), place the LM74CIM-3 away from high-power components, and consider using thin-section PCBs or thermal vias to improve ambient coupling. For dynamic thermal monitoring, evaluate whether the 340ms conversion time of the LM74CIM-3 is sufficient for your control loop requirements.
What are the replacement options for the LM74CIM-3 if I need RoHS compliance without redesigning my PCB?
For RoHS-compliant replacements that maintain pin-to-pin and SPI compatibility with the LM74CIM-3, consider the LM74CIM-3/NOPB, which is the same TI device in a Pb-free package. Alternatively, the Microchip TC77 series—including TC77-3.3MOA, TC77-5.0MOA, and their tape-and-reel variants—offer similar 8-SOIC packages, 12-bit resolution, and SPI output. However, verify voltage compatibility: the TC77-3.3MOA is optimized for 3.3V systems, while the LM74CIM-3 supports 3V–5.5V, making the 5.0V versions a better match for 5V designs. Always confirm timing and shutdown characteristics in your firmware, as slight differences in initialization or conversion cycles may require minor code adjustments.
Quality Assurance (QC)
DiGi ensures the quality and authenticity of every electronic component through professional inspections and batch sampling, guaranteeing reliable sourcing, stable performance, and compliance with technical specifications, helping customers reduce supply chain risks and confidently use components in production.
LM74CIM-3 CAD Models
Texas Instruments LM74CIM-3 PCB symbols & footprints
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